diff --git a/asterixdb/asterix-app/data/nontagged/numericData.adm b/asterixdb/asterix-app/data/nontagged/numericData.adm
index 06dd89a..12a7a7a 100644
--- a/asterixdb/asterix-app/data/nontagged/numericData.adm
+++ b/asterixdb/asterix-app/data/nontagged/numericData.adm
@@ -1,2 +1,4 @@
-{ "id": 10, "int8Field": int8("48"), "int16Field": int16("-16"),"int32Field": int32("-32"), "int64Field": int64("-64"), "int8Field2": int8("+48i8"), "int16Field2": int16("+16i16"),"int32Field2": int32("+32i32"),"int64Field2": int64("+64i64"),"int8Field3": +48i8, "int16Field3": +16i16,"int32Field3": +32i32,"int64Field3": +64i64, "int8Field4": -48i8, "int16Field4": -16i16,"int32Field4": -32i32,"int64Field4": -64i64, "floatField": float("+64"),"doubleField": double("+64"),"floatco2": float("+.64"),"doubleco2": double("+.64"),"floatco3": float("+64.1"),"doubleco3": double("+64.1"),"floatco4": float("+5.0e+10"),"doubleco4": double("+5.00e+10"),"floatco5": float("+5.0E10"),"doubleco5": double("+5.00E10"),"floatco6": float("+5.0E-10"),"doubleco6": double("+5.00E-10")}
+{ "id": 8, "int8Field": int8("48"), "int16Field": int16("-16"),"int32Field": int32("-32"), "int64Field": int64("-64"), "int8Field2": int8("+48i8"), "int16Field2": int16("+16i16"),"int32Field2": int32("+32i32"),"int64Field2": int64("+64i64"),"int8Field3": +48i8, "int16Field3": +16i16,"int32Field3": +32i32,"int64Field3": +64i64, "int8Field4": -48i8, "int16Field4": -16i16,"int32Field4": -32i32,"int64Field4": -64i64, "floatField": float("+64"),"doubleField": double("+64"),"floatco2": float("+.64"),"doubleco2": double("+.64"),"floatco3": float("+64.1"),"doubleco3": double("+64.1"),"floatco4": float("+5.0e+10"),"doubleco4": double("+5.00e+10"),"floatco5": float("+5.0E10"),"doubleco5": double("+5.00E10"),"floatco6": float("+5.0E-10"),"doubleco6": double("+5.00E-10")}
+{ "id": 9, "int8Field": int8("2"), "int16Field": int16("-16"),"int32Field": int32("-32"), "int64Field": int64("-64"), "int8Field2": int8("+48i8"), "int16Field2": int16("+16i16"),"int32Field2": int32("+32i32"),"int64Field2": int64("+64i64"),"int8Field3": +48i8, "int16Field3": +16i16,"int32Field3": +32i32,"int64Field3": +64i64, "int8Field4": -48i8, "int16Field4": -16i16,"int32Field4": -32i32,"int64Field4": -64i64, "floatField": float("+64"),"doubleField": double("+64"),"floatco2": float("+.64"),"doubleco2": double("+.64"),"floatco3": float("+64.1"),"doubleco3": double("+64.1"),"floatco4": float("+5.0e+10"),"doubleco4": double("+5.00e+10"),"floatco5": float("+5.0E10"),"doubleco5": double("+5.00E10"),"floatco6": float("+5.0E-10"),"doubleco6": double("+5.00E-10")}
+{ "id": 10, "int8Field": int8("4"), "int16Field": int16("-16"),"int32Field": int32("-32"), "int64Field": int64("-64"), "int8Field2": int8("+48i8"), "int16Field2": int16("+16i16"),"int32Field2": int32("+32i32"),"int64Field2": int64("+64i64"),"int8Field3": +48i8, "int16Field3": +16i16,"int32Field3": +32i32,"int64Field3": +64i64, "int8Field4": -48i8, "int16Field4": -16i16,"int32Field4": -32i32,"int64Field4": -64i64, "floatField": float("+64"),"doubleField": double("+64"),"floatco2": float("+.64"),"doubleco2": double("+.64"),"floatco3": float("+64.1"),"doubleco3": double("+64.1"),"floatco4": float("+5.0e+10"),"doubleco4": double("+5.00e+10"),"floatco5": float("+5.0E10"),"doubleco5": double("+5.00E10"),"floatco6": float("+5.0E-10"),"doubleco6": double("+5.00E-10")}
 { "id": 11}
diff --git a/asterixdb/asterix-app/data/nontagged/numericData.json b/asterixdb/asterix-app/data/nontagged/numericData.json
index 06dd89a..12a7a7a 100644
--- a/asterixdb/asterix-app/data/nontagged/numericData.json
+++ b/asterixdb/asterix-app/data/nontagged/numericData.json
@@ -1,2 +1,4 @@
-{ "id": 10, "int8Field": int8("48"), "int16Field": int16("-16"),"int32Field": int32("-32"), "int64Field": int64("-64"), "int8Field2": int8("+48i8"), "int16Field2": int16("+16i16"),"int32Field2": int32("+32i32"),"int64Field2": int64("+64i64"),"int8Field3": +48i8, "int16Field3": +16i16,"int32Field3": +32i32,"int64Field3": +64i64, "int8Field4": -48i8, "int16Field4": -16i16,"int32Field4": -32i32,"int64Field4": -64i64, "floatField": float("+64"),"doubleField": double("+64"),"floatco2": float("+.64"),"doubleco2": double("+.64"),"floatco3": float("+64.1"),"doubleco3": double("+64.1"),"floatco4": float("+5.0e+10"),"doubleco4": double("+5.00e+10"),"floatco5": float("+5.0E10"),"doubleco5": double("+5.00E10"),"floatco6": float("+5.0E-10"),"doubleco6": double("+5.00E-10")}
+{ "id": 8, "int8Field": int8("48"), "int16Field": int16("-16"),"int32Field": int32("-32"), "int64Field": int64("-64"), "int8Field2": int8("+48i8"), "int16Field2": int16("+16i16"),"int32Field2": int32("+32i32"),"int64Field2": int64("+64i64"),"int8Field3": +48i8, "int16Field3": +16i16,"int32Field3": +32i32,"int64Field3": +64i64, "int8Field4": -48i8, "int16Field4": -16i16,"int32Field4": -32i32,"int64Field4": -64i64, "floatField": float("+64"),"doubleField": double("+64"),"floatco2": float("+.64"),"doubleco2": double("+.64"),"floatco3": float("+64.1"),"doubleco3": double("+64.1"),"floatco4": float("+5.0e+10"),"doubleco4": double("+5.00e+10"),"floatco5": float("+5.0E10"),"doubleco5": double("+5.00E10"),"floatco6": float("+5.0E-10"),"doubleco6": double("+5.00E-10")}
+{ "id": 9, "int8Field": int8("2"), "int16Field": int16("-16"),"int32Field": int32("-32"), "int64Field": int64("-64"), "int8Field2": int8("+48i8"), "int16Field2": int16("+16i16"),"int32Field2": int32("+32i32"),"int64Field2": int64("+64i64"),"int8Field3": +48i8, "int16Field3": +16i16,"int32Field3": +32i32,"int64Field3": +64i64, "int8Field4": -48i8, "int16Field4": -16i16,"int32Field4": -32i32,"int64Field4": -64i64, "floatField": float("+64"),"doubleField": double("+64"),"floatco2": float("+.64"),"doubleco2": double("+.64"),"floatco3": float("+64.1"),"doubleco3": double("+64.1"),"floatco4": float("+5.0e+10"),"doubleco4": double("+5.00e+10"),"floatco5": float("+5.0E10"),"doubleco5": double("+5.00E10"),"floatco6": float("+5.0E-10"),"doubleco6": double("+5.00E-10")}
+{ "id": 10, "int8Field": int8("4"), "int16Field": int16("-16"),"int32Field": int32("-32"), "int64Field": int64("-64"), "int8Field2": int8("+48i8"), "int16Field2": int16("+16i16"),"int32Field2": int32("+32i32"),"int64Field2": int64("+64i64"),"int8Field3": +48i8, "int16Field3": +16i16,"int32Field3": +32i32,"int64Field3": +64i64, "int8Field4": -48i8, "int16Field4": -16i16,"int32Field4": -32i32,"int64Field4": -64i64, "floatField": float("+64"),"doubleField": double("+64"),"floatco2": float("+.64"),"doubleco2": double("+.64"),"floatco3": float("+64.1"),"doubleco3": double("+64.1"),"floatco4": float("+5.0e+10"),"doubleco4": double("+5.00e+10"),"floatco5": float("+5.0E10"),"doubleco5": double("+5.00E10"),"floatco6": float("+5.0E-10"),"doubleco6": double("+5.00E-10")}
 { "id": 11}
diff --git a/asterixdb/asterix-app/data/nontagged/numericData.txt b/asterixdb/asterix-app/data/nontagged/numericData.txt
index fe9d53e..dbc99da 100644
--- a/asterixdb/asterix-app/data/nontagged/numericData.txt
+++ b/asterixdb/asterix-app/data/nontagged/numericData.txt
@@ -2,4 +2,12 @@
 20:int8("+48i8"):int16("+16i16"):int32("+32i32"):int64("+64i64"):float("+5.0e+10"):double("+5.00e+10")
 30:+48i8:+16i16:+32i32:+64i64:float("+5.0E10"):double("+5.00E10")
 40:-48i8:-16i16:-32i32:-64i64:float("+5.0E-10"):double("+5.00E-10")
+50:int8("48"):int16("-16"):int32("-32"):int64("-64"):float("+64"):double("+64")
+60:int8("+48i8"):int16("+16i16"):int32("+32i32"):int64("+64i64"):float("+5.0e+10"):double("+5.00e+10")
+70:+48i8:+16i16:+32i32:+64i64:float("+5.0E10"):double("+5.00E10")
+80:-48i8:-16i16:-32i32:-64i64:float("+5.0E-10"):double("+5.00E-10")
+90:int8("48"):int16("-16"):int32("-32"):int64("-64"):float("+64"):double("+64")
+100:int8("+48i8"):int16("+16i16"):int32("+32i32"):int64("+64i64"):float("+5.0e+10"):double("+5.00e+10")
+110:+48i8:+16i16:+32i32:+64i64:float("+5.0E10"):double("+5.00E10")
+120:-48i8:-16i16:-32i32:-64i64:float("+5.0E-10"):double("+5.00E-10")
 
diff --git a/asterixdb/asterix-app/src/test/resources/optimizerts/queries/aggregate/serial-agg.sqlpp b/asterixdb/asterix-app/src/test/resources/optimizerts/queries/aggregate/serial-agg.sqlpp
new file mode 100644
index 0000000..016921d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/optimizerts/queries/aggregate/serial-agg.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : smallint
+};
+
+create  dataset Test(TestType) primary key id;
+
+select gid, stddev(t.val) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/optimizerts/results/aggregate/serial-agg.plan b/asterixdb/asterix-app/src/test/resources/optimizerts/results/aggregate/serial-agg.plan
new file mode 100644
index 0000000..a5d897d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/optimizerts/results/aggregate/serial-agg.plan
@@ -0,0 +1,24 @@
+-- DISTRIBUTE_RESULT  |PARTITIONED|
+  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+    -- STREAM_PROJECT  |PARTITIONED|
+      -- ASSIGN  |PARTITIONED|
+        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+          -- EXTERNAL_GROUP_BY[$$43]  |PARTITIONED|
+                  {
+                    -- AGGREGATE  |LOCAL|
+                      -- NESTED_TUPLE_SOURCE  |LOCAL|
+                  }
+            -- HASH_PARTITION_EXCHANGE [$$43]  |PARTITIONED|
+              -- EXTERNAL_GROUP_BY[$$38]  |PARTITIONED|
+                      {
+                        -- AGGREGATE  |LOCAL|
+                          -- NESTED_TUPLE_SOURCE  |LOCAL|
+                      }
+                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                  -- STREAM_PROJECT  |PARTITIONED|
+                    -- ASSIGN  |PARTITIONED|
+                      -- STREAM_PROJECT  |PARTITIONED|
+                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                          -- DATASOURCE_SCAN  |PARTITIONED|
+                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                              -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null/agg_null.3.query.aql b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null/agg_null.3.query.aql
index 15a560d..db3e6c1 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null/agg_null.3.query.aql
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null/agg_null.3.query.aql
@@ -24,4 +24,4 @@
 
 let $l1 := [null]
 let $l2 := {{null, null}}
-return { "sql-count1": sql-count($l1), "average1": sql-avg($l1), "sql-sum1": sql-sum($l1), "sql-min1": sql-min($l1), "sql-max1": sql-max($l1), "sql-count2": sql-count($l2), "average2": sql-avg($l2), "sql-sum2": sql-sum($l2), "sql-min2": sql-min($l2), "sql-max2": sql-max($l2) } 
+return { "sql-count1": sql-count($l1), "average1": sql-avg($l1), "sql-sum1": sql-sum($l1), "sql-min1": sql-min($l1), "sql-max1": sql-max($l1), "sql-stddev1": sql-stddev($l1), "sql-count2": sql-count($l2), "average2": sql-avg($l2), "sql-sum2": sql-sum($l2), "sql-min2": sql-min($l2), "sql-max2": sql-max($l2),  "sql-stddev2": sql-stddev($l2)}
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null_rec/agg_null_rec.3.query.aql b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null_rec/agg_null_rec.3.query.aql
index 0ffbe42..0e9081a 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null_rec/agg_null_rec.3.query.aql
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null_rec/agg_null_rec.3.query.aql
@@ -25,4 +25,4 @@
 use dataverse test;
 
 let $l := for $t in dataset Test return $t.valplus
-return { "sql-count": sql-count($l), "average": sql-avg($l), "sql-sum": sql-sum($l), "sql-min": sql-min($l), "sql-max": sql-max($l) }  
+return { "sql-count": sql-count($l), "average": sql-avg($l), "sql-stddev": sql-stddev($l), "sql-sum": sql-sum($l), "sql-min": sql-min($l), "sql-max": sql-max($l) }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.query.aql b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.query.aql
index b584709..121264d 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.query.aql
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.query.aql
@@ -26,5 +26,5 @@
 
 let $l := for $t in dataset Test return $t
 return { "sql-count": sql-count($l), "average": sql-avg(for $i in $l return $i.val), "sql-sum":
-sql-sum(for $i in $l return $i.val), "sql-min": sql-min(for $i in $l return $i.valplus),
-"sql-max": sql-max(for $i in $l return $i.valplus) }
+sql-sum(for $i in $l return $i.val), "sql-stddev": sql-stddev(for $i in $l return $i.valplus),
+"sql-min": sql-min(for $i in $l return $i.valplus), "sql-max": sql-max(for $i in $l return $i.valplus) }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_number/agg_number.3.query.aql b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_number/agg_number.3.query.aql
index db6c991..ea1db8a 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_number/agg_number.3.query.aql
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_number/agg_number.3.query.aql
@@ -29,5 +29,6 @@
 let $a3 := sql-sum($l2)
 let $a4 := sql-min($l2)
 let $a5 := sql-max($l2)
-return { "sql-count1": sql-count($l1), "average1": sql-avg($l1), "sql-sum1": sql-sum($l1), "sql-min1": sql-min($l1), "sql-max1": sql-max($l1), "sql-count2": $a1, "average2": $a2, "sql-sum2": $a3, "sql-min2": $a4, "sql-max2": $a5 }
+let $a6 := sql-stddev($l2)
+return { "sql-count1": sql-count($l1), "average1": sql-avg($l1), "sql-stddev1": sql-stddev($l1), "sql-sum1": sql-sum($l1), "sql-min1": sql-min($l1), "sql-max1": sql-max($l1), "sql-count2": $a1, "average2": $a2, "sql-stddev2": $a6, "sql-sum2": $a3, "sql-min2": $a4, "sql-max2": $a5 }
 
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_number_rec/agg_number_rec.3.query.aql b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_number_rec/agg_number_rec.3.query.aql
index b7a42a0..522b50e 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_number_rec/agg_number_rec.3.query.aql
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate-sql/agg_number_rec/agg_number_rec.3.query.aql
@@ -25,4 +25,4 @@
 use dataverse test;
 
 let $l := for $t in dataset Test return $t.valplus
-return { "sql-count": sql-count($l), "average": sql-avg($l), "sql-sum": sql-sum($l), "sql-min": sql-min($l), "sql-max": sql-max($l) }  
+return { "sql-count": sql-count($l), "average": sql-avg($l), "sql-stddev": sql-stddev($l), "sql-sum": sql-sum($l), "sql-min": sql-min($l), "sql-max": sql-max($l) }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null/agg_null.3.query.aql b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null/agg_null.3.query.aql
index 292e130..5f39d47 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null/agg_null.3.query.aql
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null/agg_null.3.query.aql
@@ -24,4 +24,4 @@
 
 let $l1 := [null]
 let $l2 := {{null, null}}
-return { "count1": count($l1), "average1": avg($l1), "sum1": sum($l1), "min1": min($l1), "max1": max($l1), "count2": count($l2), "average2": avg($l2), "sum2": sum($l2), "min2": min($l2), "max2": max($l2) } 
+return { "count1": count($l1), "average1": avg($l1), "sum1": sum($l1), "min1": min($l1), "max1": max($l1),"stddev1": stddev($l1), "count2": count($l2), "average2": avg($l2), "sum2": sum($l2), "min2": min($l2), "max2": max($l2), "stddev2": stddev($l2) }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null_rec/agg_null_rec.3.query.aql b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null_rec/agg_null_rec.3.query.aql
index d8e1d91..5b14f2d 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null_rec/agg_null_rec.3.query.aql
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null_rec/agg_null_rec.3.query.aql
@@ -25,4 +25,4 @@
 use dataverse test;
 
 let $l := for $t in dataset Test return $t.valplus
-return { "count": count($l), "average": avg($l), "sum": sum($l), "min": min($l), "max": max($l) }  
+return { "count": count($l), "average": avg($l), "stddev": stddev($l), "sum": sum($l), "min": min($l), "max": max($l) }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null_rec_1/agg_null_rec_1.3.query.aql b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null_rec_1/agg_null_rec_1.3.query.aql
index 415198a..5b8a017 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null_rec_1/agg_null_rec_1.3.query.aql
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_null_rec_1/agg_null_rec_1.3.query.aql
@@ -26,5 +26,5 @@
 
 let $l := for $t in dataset Test return $t
 return { "count": count($l), "average": avg(for $i in $l return $i.val), "sum":
-sum(for $i in $l return $i.val), "min": min(for $i in $l return $i.valplus),
-"max": max(for $i in $l return $i.valplus) }
+sum(for $i in $l return $i.val), "stddev": stddev(for $i in $l return $i.val),
+"min": min(for $i in $l return $i.valplus), "max": max(for $i in $l return $i.valplus) }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_number/agg_number.3.query.aql b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_number/agg_number.3.query.aql
index 3e60dad..3ece422 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_number/agg_number.3.query.aql
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_number/agg_number.3.query.aql
@@ -29,5 +29,6 @@
 let $a3 := sum($l2)
 let $a4 := min($l2)
 let $a5 := max($l2)
-return { "count1": count($l1), "average1": avg($l1), "sum1": sum($l1), "min1": min($l1), "max1": max($l1), "count2": $a1, "average2": $a2, "sum2": $a3, "min2": $a4, "max2": $a5 }
+let $a6 := stddev($l2)
+return { "count1": count($l1), "average1": avg($l1), "stddev1": stddev($l1), "sum1": sum($l1), "min1": min($l1), "max1": max($l1), "count2": $a1, "average2": $a2, "stddev2": $a6, "sum2": $a3, "min2": $a4, "max2": $a5 }
 
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_number_rec/agg_number_rec.3.query.aql b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_number_rec/agg_number_rec.3.query.aql
index 1ad04fa..220ff31 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_number_rec/agg_number_rec.3.query.aql
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries/aggregate/agg_number_rec/agg_number_rec.3.query.aql
@@ -25,4 +25,4 @@
 use dataverse test;
 
 let $l := for $t in dataset Test return $t.valplus
-return { "count": count($l), "average": avg($l), "sum": sum($l), "min": min($l), "max": max($l) }  
+return { "count": count($l), "average": avg($l), "stddev": stddev($l), "sum": sum($l), "min": min($l), "max": max($l) }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null/agg_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null/agg_null.3.query.sqlpp
index 911bb59..9fd31d1 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null/agg_null.3.query.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null/agg_null.3.query.sqlpp
@@ -22,4 +22,4 @@
 * Date         : Feb 7th 2014
 */
 
-{'sql-count1':array_count([null]),'average1':array_avg([null]),'sql-sum1':array_sum([null]),'sql-min1':array_min([null]),'sql-max1':array_max([null]),'sql-count2':array_count({{null,null}}),'average2':array_avg({{null,null}}),'sql-sum2':array_sum({{null,null}}),'sql-min2':array_min({{null,null}}),'sql-max2':array_max({{null,null}})};
+{'sql-count1':array_count([null]),'average1':array_avg([null]),'sql-sum1':array_sum([null]),'sql-min1':array_min([null]),'sql-max1':array_max([null]),'sql-stddev1':array_stddev([null]),'sql-count2':array_count({{null,null}}),'average2':array_avg({{null,null}}),'sql-sum2':array_sum({{null,null}}),'sql-min2':array_min({{null,null}}),'sql-max2':array_max({{null,null}}),'sql-stddev2':array_stddev({{null,null}})};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null_rec/agg_null_rec.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null_rec/agg_null_rec.3.query.sqlpp
index 1307ccc..b5bdd81 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null_rec/agg_null_rec.3.query.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null_rec/agg_null_rec.3.query.sqlpp
@@ -40,4 +40,7 @@
 )),'sql-max':test.array_max((
     select element t.valplus
     from  Test as t
+)),'sql-stddev':test.array_stddev((
+    select element t.valplus
+    from  Test as t
 ))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.query.sqlpp
index 629a7bb..13c8be1 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.query.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.query.sqlpp
@@ -52,4 +52,10 @@
         select element t
         from  Test as t
     ) as i
+)),'sql-stddev':test.array_stddev((
+    select element i.valplus
+    from  (
+        select element t
+        from  Test as t
+    ) as i
 ))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_number/agg_number.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_number/agg_number.3.query.sqlpp
index cc5aaa0..4776925 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_number/agg_number.3.query.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_number/agg_number.3.query.sqlpp
@@ -22,4 +22,4 @@
 * Date         : Feb 7th 2014
 */
 
-{'sql-count1':array_count([float('2.0'),double('3.0'),93847382783847382,1]),'average1':array_avg([float('2.0'),double('3.0'),93847382783847382,1]),'sql-sum1':array_sum([float('2.0'),double('3.0'),93847382783847382,1]),'sql-min1':array_min([float('2.0'),double('3.0'),93847382783847382,1]),'sql-max1':array_max([float('2.0'),double('3.0'),93847382783847382,1]),'sql-count2':array_count({{float('2.0'),double('3.0'),93847382783847382,1}}),'average2':array_avg({{float('2.0'),double('3.0'),93847382783847382,1}}),'sql-sum2':array_sum({{float('2.0'),double('3.0'),93847382783847382,1}}),'sql-min2':array_min({{float('2.0'),double('3.0'),93847382783847382,1}}),'sql-max2':array_max({{float('2.0'),double('3.0'),93847382783847382,1}})};
+{'sql-count1':array_count([float('2.0'),double('3.0'),93847382783847382,1]),'average1':array_avg([float('2.0'),double('3.0'),93847382783847382,1]),'sql-sum1':array_sum([float('2.0'),double('3.0'),93847382783847382,1]),'sql-min1':array_min([float('2.0'),double('3.0'),93847382783847382,1]),'sql-max1':array_max([float('2.0'),double('3.0'),93847382783847382,1]),'sql-stddev1':array_stddev([float('2.0'),double('3.0'),93847382783847382,1]),'sql-count2':array_count({{float('2.0'),double('3.0'),93847382783847382,1}}),'average2':array_avg({{float('2.0'),double('3.0'),93847382783847382,1}}),'sql-sum2':array_sum({{float('2.0'),double('3.0'),93847382783847382,1}}),'sql-min2':array_min({{float('2.0'),double('3.0'),93847382783847382,1}}),'sql-max2':array_max({{float('2.0'),double('3.0'),93847382783847382,1}}),'sql-stddev2':array_stddev({{float('2.0'),double('3.0'),93847382783847382,1}})};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_number_rec/agg_number_rec.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_number_rec/agg_number_rec.3.query.sqlpp
index 8476060..faec87a 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_number_rec/agg_number_rec.3.query.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/agg_number_rec/agg_number_rec.3.query.sqlpp
@@ -40,4 +40,7 @@
 )),'sql-max':test.array_max((
     select element t.valplus
     from  Test as t
+)),'sql-stddev':test.array_stddev((
+    select element t.valplus
+    from  Test as t
 ))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.1.ddl.sqlpp
new file mode 100644
index 0000000..fbd4e19
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.1.ddl.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of array_avg without nulls.
+ * Success        : Yes
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.3.query.sqlpp
new file mode 100644
index 0000000..8a4ed23
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.3.query.sqlpp
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of array_stddev without nulls.
+ * Success        : Yes
+ */
+
+use test;
+
+
+with  i8 as test.array_stddev([test.tinyint('1'),test.tinyint('2'),test.tinyint('3')]),
+      i16 as test.array_stddev([test.smallint('1'),test.smallint('2'),test.smallint('3')]),
+      i32 as test.array_stddev([test.integer('1'),test.integer('2'),test.integer('3')]),
+      i64 as test.array_stddev([test.bigint('1'),test.bigint('2'),test.bigint('3')]),
+      f as test.array_stddev([test.float('1'),test.float('2'),test.float('3')]),
+      d as test.array_stddev([test.double('1'),test.double('2'),test.double('3')])
+select element i
+from  [i8,i16,i32,i64,f,d] as i
+;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.1.ddl.sqlpp
new file mode 100644
index 0000000..430406c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.1.ddl.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of array_avg with an empty list.
+ * Success        : Yes
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.3.query.sqlpp
new file mode 100644
index 0000000..2b01753
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.3.query.sqlpp
@@ -0,0 +1,24 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of array_stddev with an empty list.
+ * Success        : Yes
+ */
+
+select element array_stddev([]);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.1.ddl.sqlpp
new file mode 100644
index 0000000..87b10c9
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.1.ddl.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of array_avg with nulls.
+ * Success        : Yes
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.3.query.sqlpp
new file mode 100644
index 0000000..e49076d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.3.query.sqlpp
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of array_stddev with nulls.
+ * Success        : Yes
+ */
+
+use test;
+
+
+with  i8 as test.array_stddev([test.tinyint('1'),test.tinyint('2'),test.tinyint('3'),null]),
+      i16 as test.array_stddev([test.smallint('1'),test.smallint('2'),test.smallint('3'),null]),
+      i32 as test.array_stddev([test.integer('1'),test.integer('2'),test.integer('3'),null]),
+      i64 as test.array_stddev([test.bigint('1'),test.bigint('2'),test.bigint('3'),null]),
+      f as test.array_stddev([test.float('1'),test.float('2'),test.float('3'),null]),
+      d as test.array_stddev([test.double('1'),test.double('2'),test.double('3'),null])
+select element i
+from  [i8,i16,i32,i64,f,d] as i
+;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.1.ddl.sqlpp
new file mode 100644
index 0000000..da0bd7b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : double
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.2.update.sqlpp
new file mode 100644
index 0000000..88d820c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':double(4.32),'valplus':double(473847.0)};
+insert into Test
+select element {'id':1,'gid':1,'val':double(5.32)};
+insert into Test
+select element {'id':2,'gid':1,'val':double(6.32),'valplus':double(38473827484738239.0)};
+insert into Test
+select element {'id':3,'gid':1,'val':double(4.32),'valplus':double(678900.0)};
+insert into Test
+select element {'id':4,'gid':1,'val':double(4.32),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.3.query.sqlpp
new file mode 100644
index 0000000..1219f2e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.val) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.1.ddl.sqlpp
new file mode 100644
index 0000000..da0bd7b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : double
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.2.update.sqlpp
new file mode 100644
index 0000000..88d820c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':double(4.32),'valplus':double(473847.0)};
+insert into Test
+select element {'id':1,'gid':1,'val':double(5.32)};
+insert into Test
+select element {'id':2,'gid':1,'val':double(6.32),'valplus':double(38473827484738239.0)};
+insert into Test
+select element {'id':3,'gid':1,'val':double(4.32),'valplus':double(678900.0)};
+insert into Test
+select element {'id':4,'gid':1,'val':double(4.32),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.3.query.sqlpp
new file mode 100644
index 0000000..2125b05
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.valplus) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.1.ddl.sqlpp
new file mode 100644
index 0000000..da0bd7b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : double
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.3.query.sqlpp
new file mode 100644
index 0000000..1219f2e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.val) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.1.ddl.sqlpp
new file mode 100644
index 0000000..ddac6a0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : float
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.2.update.sqlpp
new file mode 100644
index 0000000..40641b5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':float('4.32'),'valplus':float('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':float('5.32')};
+insert into Test
+select element {'id':2,'gid':1,'val':float('6.32'),'valplus':float('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':float('4.32'),'valplus':float('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':float('4.32'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.3.query.sqlpp
new file mode 100644
index 0000000..1219f2e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.val) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.1.ddl.sqlpp
new file mode 100644
index 0000000..ddac6a0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : float
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.2.update.sqlpp
new file mode 100644
index 0000000..40641b5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':float('4.32'),'valplus':float('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':float('5.32')};
+insert into Test
+select element {'id':2,'gid':1,'val':float('6.32'),'valplus':float('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':float('4.32'),'valplus':float('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':float('4.32'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.3.query.sqlpp
new file mode 100644
index 0000000..2125b05
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.valplus) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.1.ddl.sqlpp
new file mode 100644
index 0000000..0c0bfee
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : smallint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.2.update.sqlpp
new file mode 100644
index 0000000..6210af4
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':smallint('4'),'valplus':smallint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':smallint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':smallint('6'),'valplus':smallint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':smallint('4'),'valplus':smallint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':smallint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.3.query.sqlpp
new file mode 100644
index 0000000..1219f2e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.val) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.1.ddl.sqlpp
new file mode 100644
index 0000000..0c0bfee
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : smallint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.2.update.sqlpp
new file mode 100644
index 0000000..6210af4
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':smallint('4'),'valplus':smallint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':smallint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':smallint('6'),'valplus':smallint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':smallint('4'),'valplus':smallint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':smallint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.3.query.sqlpp
new file mode 100644
index 0000000..2125b05
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.valplus) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.1.ddl.sqlpp
new file mode 100644
index 0000000..07312bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : integer
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.2.update.sqlpp
new file mode 100644
index 0000000..a248a0f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':integer('4'),'valplus':integer('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':integer('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':integer('6'),'valplus':integer('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':integer('4'),'valplus':integer('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':integer('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.3.query.sqlpp
new file mode 100644
index 0000000..1219f2e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.val) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.1.ddl.sqlpp
new file mode 100644
index 0000000..07312bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : integer
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.2.update.sqlpp
new file mode 100644
index 0000000..a248a0f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':integer('4'),'valplus':integer('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':integer('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':integer('6'),'valplus':integer('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':integer('4'),'valplus':integer('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':integer('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.3.query.sqlpp
new file mode 100644
index 0000000..2125b05
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.valplus) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.1.ddl.sqlpp
new file mode 100644
index 0000000..5e9972c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : bigint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.2.update.sqlpp
new file mode 100644
index 0000000..b460af2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':bigint('4'),'valplus':bigint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':bigint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':bigint('6'),'valplus':bigint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':bigint('4'),'valplus':bigint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':bigint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.3.query.sqlpp
new file mode 100644
index 0000000..1219f2e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.val) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.1.ddl.sqlpp
new file mode 100644
index 0000000..5e9972c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : bigint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.2.update.sqlpp
new file mode 100644
index 0000000..b460af2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':bigint('4'),'valplus':bigint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':bigint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':bigint('6'),'valplus':bigint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':bigint('4'),'valplus':bigint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':bigint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.3.query.sqlpp
new file mode 100644
index 0000000..2125b05
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.valplus) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.1.ddl.sqlpp
new file mode 100644
index 0000000..c45dbfe
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : tinyint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.2.update.sqlpp
new file mode 100644
index 0000000..5a65a20
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':tinyint('4'),'valplus':tinyint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':tinyint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':tinyint('6'),'valplus':tinyint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':tinyint('4'),'valplus':tinyint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':tinyint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.3.query.sqlpp
new file mode 100644
index 0000000..1219f2e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.val) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.1.ddl.sqlpp
new file mode 100644
index 0000000..c45dbfe
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : tinyint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.2.update.sqlpp
new file mode 100644
index 0000000..5a65a20
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':tinyint('4'),'valplus':tinyint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':tinyint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':tinyint('6'),'valplus':tinyint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':tinyint('4'),'valplus':tinyint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':tinyint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.3.query.sqlpp
new file mode 100644
index 0000000..2125b05
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, stddev(t.valplus) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.1.ddl.sqlpp
new file mode 100644
index 0000000..da0bd7b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : double
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.2.update.sqlpp
new file mode 100644
index 0000000..8c0b731
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.2.update.sqlpp
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':double(4.32),'valplus':float('2.0')};
+insert into Test
+select element {'id':1,'gid':1,'val':double(5.32)};
+insert into Test
+select element {'id':2,'gid':1,'val':double(6.32),'valplus':'hello world'};
+insert into Test
+select element {'id':3,'gid':1,'val':double(4.32),'valplus':double('3.0')};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.3.query.sqlpp
new file mode 100644
index 0000000..0c6a8a8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.3.query.sqlpp
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+ /*
+ * Description  : Run serial-stddev over an ordered list with mixed types
+ * Expected Res : Failure
+ * Date         : March 5th 2018
+ */
+
+use test;
+
+select gid, array_stddev((select value g.valplus from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(valplus as valplus);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double/stddev_double.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double/stddev_double.1.ddl.sqlpp
new file mode 100644
index 0000000..ad97753
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double/stddev_double.1.ddl.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double/stddev_double.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double/stddev_double.3.query.sqlpp
new file mode 100644
index 0000000..4a539ed
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double/stddev_double.3.query.sqlpp
@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+select element array_stddev((
+    select element x
+    from  [1.0,2.0,double('3.0')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.1.ddl.sqlpp
new file mode 100644
index 0000000..3f2c5bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : integer,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.3.query.sqlpp
new file mode 100644
index 0000000..c06f58d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.array_stddev((
+    select element x.doubleField
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.1.ddl.sqlpp
new file mode 100644
index 0000000..a6590c5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.1.ddl.sqlpp
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests that array_avg aggregation correctly returns null for an empty stream,
+ *                  without an aggregate combiner.
+ * Success        : Yes
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.3.query.sqlpp
new file mode 100644
index 0000000..8331de0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.3.query.sqlpp
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests that array_stddev aggregation correctly returns null for an empty stream,
+ *                  without an aggregate combiner.
+ * Success        : Yes
+ */
+
+use test;
+
+
+select element test.array_stddev((
+    select element x
+    from  [1,2,3] as x
+    where (x > 10)
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.1.ddl.sqlpp
new file mode 100644
index 0000000..b9cd662
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests that array_avg aggregation correctly returns null for an empty stream,
+ *                  with an aggregate combiner.
+ * Success        : Yes
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+ closed {
+  id : bigint,
+  val : double
+};
+
+create  dataset Test(TestType) primary key id;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.3.query.sqlpp
new file mode 100644
index 0000000..bfbe1b1
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.3.query.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests that array_stddev aggregation correctly returns null for an empty stream,
+ *                  with an aggregate combiner.
+ * Success        : Yes
+ */
+
+use test;
+
+
+select element test.array_stddev((
+    select element x.val
+    from  Test as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float/stddev_float.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float/stddev_float.1.ddl.sqlpp
new file mode 100644
index 0000000..21479a2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float/stddev_float.1.ddl.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float/stddev_float.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float/stddev_float.3.query.sqlpp
new file mode 100644
index 0000000..cb51c3d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float/stddev_float.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+select element test.array_stddev((
+    select element x
+    from  [test.float('1'),test.float('2'),test.float('3')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.1.ddl.sqlpp
new file mode 100644
index 0000000..6788afc
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : bigint,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.3.query.sqlpp
new file mode 100644
index 0000000..c85ce12
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.array_stddev((
+    select element x.floatField
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16/stddev_int16.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16/stddev_int16.1.ddl.sqlpp
new file mode 100644
index 0000000..21479a2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16/stddev_int16.1.ddl.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16/stddev_int16.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16/stddev_int16.3.query.sqlpp
new file mode 100644
index 0000000..c5360e9
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16/stddev_int16.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+select element test.array_stddev((
+    select element x
+    from  [test.smallint('1'),test.smallint('2'),test.smallint('3')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.1.ddl.sqlpp
new file mode 100644
index 0000000..6788afc
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : bigint,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.3.query.sqlpp
new file mode 100644
index 0000000..f89e1ec
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.array_stddev((
+    select element x.int16Field
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32/stddev_int32.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32/stddev_int32.1.ddl.sqlpp
new file mode 100644
index 0000000..21479a2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32/stddev_int32.1.ddl.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32/stddev_int32.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32/stddev_int32.3.query.sqlpp
new file mode 100644
index 0000000..afbe777
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32/stddev_int32.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+select element test.array_stddev((
+    select element x
+    from  [test.integer('1'),test.integer('2'),test.integer('3')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.1.ddl.sqlpp
new file mode 100644
index 0000000..6788afc
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : bigint,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.3.query.sqlpp
new file mode 100644
index 0000000..a76ea4a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.array_stddev((
+    select element x.int32Field
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64/stddev_int64.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64/stddev_int64.1.ddl.sqlpp
new file mode 100644
index 0000000..21479a2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64/stddev_int64.1.ddl.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64/stddev_int64.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64/stddev_int64.3.query.sqlpp
new file mode 100644
index 0000000..17e2285
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64/stddev_int64.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+select element test.array_stddev((
+    select element x
+    from  [test.bigint('1'),test.bigint('2'),test.bigint('3')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.1.ddl.sqlpp
new file mode 100644
index 0000000..6788afc
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : bigint,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.3.query.sqlpp
new file mode 100644
index 0000000..5ed6db6
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.array_stddev((
+    select element x.int64Field
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8/stddev_int8.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8/stddev_int8.1.ddl.sqlpp
new file mode 100644
index 0000000..21479a2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8/stddev_int8.1.ddl.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8/stddev_int8.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8/stddev_int8.3.query.sqlpp
new file mode 100644
index 0000000..6efdcaf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8/stddev_int8.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+select element test.array_stddev((
+    select element x
+    from  [test.tinyint('1'),test.tinyint('2'),test.tinyint('3')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.1.ddl.sqlpp
new file mode 100644
index 0000000..6788afc
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : bigint,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.3.query.sqlpp
new file mode 100644
index 0000000..1001843
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.array_stddev((
+    select element x.int8Field
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_mixed/stddev_mixed.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_mixed/stddev_mixed.3.query.sqlpp
new file mode 100644
index 0000000..69ad38c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate-sql/stddev_mixed/stddev_mixed.3.query.sqlpp
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+* Description  : Run array_avg over an ordered list with mixed types
+* Expected Res : Failure
+* Date         : March 5th 2018
+*/
+
+select element array_stddev((
+    select element x
+    from  [float('2.0'),'hello world',93847382783847382,date('2013-01-01')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null/agg_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null/agg_null.3.query.sqlpp
index 947d19b..062cb48 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null/agg_null.3.query.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null/agg_null.3.query.sqlpp
@@ -22,4 +22,4 @@
 * Date         : Jun 2nd 2013
 */
 
-{'count1':strict_count([null]),'average1':strict_avg([null]),'sum1':strict_sum([null]),'min1':strict_min([null]),'max1':strict_max([null]),'count2':strict_count({{null,null}}),'average2':strict_avg({{null,null}}),'sum2':strict_sum({{null,null}}),'min2':strict_min({{null,null}}),'max2':strict_max({{null,null}})};
+{'count1':strict_count([null]),'average1':strict_avg([null]),'sum1':strict_sum([null]),'min1':strict_min([null]),'max1':strict_max([null]),'stddev1':strict_stddev([null]),'count2':strict_count({{null,null}}),'average2':strict_avg({{null,null}}),'sum2':strict_sum({{null,null}}),'min2':strict_min({{null,null}}),'max2':strict_max({{null,null}}),'stddev2':strict_stddev({{null,null}})};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null_rec/agg_null_rec.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null_rec/agg_null_rec.3.query.sqlpp
index 62506cc..88c86f5 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null_rec/agg_null_rec.3.query.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null_rec/agg_null_rec.3.query.sqlpp
@@ -40,4 +40,7 @@
 )),'max':test.strict_max((
     select element t.valplus
     from  Test as t
+)), 'stddev':test.strict_stddev((
+    select element t.valplus
+    from  Test as t
 ))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null_rec_1/agg_null_rec_1.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null_rec_1/agg_null_rec_1.3.query.sqlpp
index 47887d9..bf316da 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null_rec_1/agg_null_rec_1.3.query.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_null_rec_1/agg_null_rec_1.3.query.sqlpp
@@ -52,4 +52,10 @@
         select element t
         from  Test as t
     ) as i
+)),'stddev':test.strict_stddev((
+    select element i.val
+    from  (
+        select element t
+        from  Test as t
+    ) as i
 ))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_number/agg_number.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_number/agg_number.3.query.sqlpp
index 5577347..e8385ca 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_number/agg_number.3.query.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_number/agg_number.3.query.sqlpp
@@ -22,4 +22,4 @@
 * Date         : Jun 2nd 2013
 */
 
-{'count1':strict_count([float('2.0'),double('3.0'),93847382783847382,1]),'average1':strict_avg([float('2.0'),double('3.0'),93847382783847382,1]),'sum1':strict_sum([float('2.0'),double('3.0'),93847382783847382,1]),'min1':strict_min([float('2.0'),double('3.0'),93847382783847382,1]),'max1':strict_max([float('2.0'),double('3.0'),93847382783847382,1]),'count2':strict_count({{float('2.0'),double('3.0'),93847382783847382,1}}),'average2':strict_avg({{float('2.0'),double('3.0'),93847382783847382,1}}),'sum2':strict_sum({{float('2.0'),double('3.0'),93847382783847382,1}}),'min2':strict_min({{float('2.0'),double('3.0'),93847382783847382,1}}),'max2':strict_max({{float('2.0'),double('3.0'),93847382783847382,1}})};
+{'count1':strict_count([float('2.0'),double('3.0'),93847382783847382,1]),'average1':strict_avg([float('2.0'),double('3.0'),93847382783847382,1]),'sum1':strict_sum([float('2.0'),double('3.0'),93847382783847382,1]),'min1':strict_min([float('2.0'),double('3.0'),93847382783847382,1]),'max1':strict_max([float('2.0'),double('3.0'),93847382783847382,1]),'stddev1':strict_stddev([float('2.0'),double('3.0'),93847382783847382,1]),'count2':strict_count({{float('2.0'),double('3.0'),93847382783847382,1}}),'average2':strict_avg({{float('2.0'),double('3.0'),93847382783847382,1}}),'sum2':strict_sum({{float('2.0'),double('3.0'),93847382783847382,1}}),'min2':strict_min({{float('2.0'),double('3.0'),93847382783847382,1}}),'max2':strict_max({{float('2.0'),double('3.0'),93847382783847382,1}}),'stddev2':strict_stddev([float('2.0'),double('3.0'),93847382783847382,1])};
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_number_rec/agg_number_rec.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_number_rec/agg_number_rec.3.query.sqlpp
index c7d7eb1..391e49d 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_number_rec/agg_number_rec.3.query.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/agg_number_rec/agg_number_rec.3.query.sqlpp
@@ -40,4 +40,7 @@
 )),'max':test.strict_max((
     select element t.valplus
     from  Test as t
+)),'stddev':test.strict_stddev((
+    select element t.valplus
+    from  Test as t
 ))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev/scalar_stddev.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev/scalar_stddev.1.ddl.sqlpp
new file mode 100644
index 0000000..bc2d063
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev/scalar_stddev.1.ddl.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of avg without nulls.
+ * Success        : Yes
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev/scalar_stddev.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev/scalar_stddev.3.query.sqlpp
new file mode 100644
index 0000000..e1d9437
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev/scalar_stddev.3.query.sqlpp
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of stddev without nulls.
+ * Success        : Yes
+ */
+
+use test;
+
+
+with  i8 as test.strict_stddev([test.tinyint('1'),test.tinyint('2'),test.tinyint('3')]),
+      i16 as test.strict_stddev([test.smallint('1'),test.smallint('2'),test.smallint('3')]),
+      i32 as test.strict_stddev([test.integer('1'),test.integer('2'),test.integer('3')]),
+      i64 as test.strict_stddev([test.bigint('1'),test.bigint('2'),test.bigint('3')]),
+      f as test.strict_stddev([test.float('1'),test.float('2'),test.float('3')]),
+      d as test.strict_stddev([test.double('1'),test.double('2'),test.double('3')])
+select element i
+from  [i8,i16,i32,i64,f,d] as i
+;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.1.ddl.sqlpp
new file mode 100644
index 0000000..cb061c2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.1.ddl.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of avg with an empty list.
+ * Success        : Yes
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.3.query.sqlpp
new file mode 100644
index 0000000..9dedcbd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.3.query.sqlpp
@@ -0,0 +1,24 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of stddev with an empty list.
+ * Success        : Yes
+ */
+
+select element strict_stddev([]);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.1.ddl.sqlpp
new file mode 100644
index 0000000..03230ec
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.1.ddl.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of avg with nulls.
+ * Success        : Yes
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.3.query.sqlpp
new file mode 100644
index 0000000..e8a3d18
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.3.query.sqlpp
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests the scalar version of stddev with nulls.
+ * Success        : Yes
+ */
+
+use test;
+
+
+with  i8 as test.strict_stddev([test.tinyint('1'),test.tinyint('2'),test.tinyint('3'),null]),
+      i16 as test.strict_stddev([test.smallint('1'),test.smallint('2'),test.smallint('3'),null]),
+      i32 as test.strict_stddev([test.integer('1'),test.integer('2'),test.integer('3'),null]),
+      i64 as test.strict_stddev([test.bigint('1'),test.bigint('2'),test.bigint('3'),null]),
+      f as test.strict_stddev([test.float('1'),test.float('2'),test.float('3'),null]),
+      d as test.strict_stddev([test.double('1'),test.double('2'),test.double('3'),null])
+select element i
+from  [i8,i16,i32,i64,f,d] as i
+;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.1.ddl.sqlpp
new file mode 100644
index 0000000..da0bd7b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : double
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.2.update.sqlpp
new file mode 100644
index 0000000..88d820c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':double(4.32),'valplus':double(473847.0)};
+insert into Test
+select element {'id':1,'gid':1,'val':double(5.32)};
+insert into Test
+select element {'id':2,'gid':1,'val':double(6.32),'valplus':double(38473827484738239.0)};
+insert into Test
+select element {'id':3,'gid':1,'val':double(4.32),'valplus':double(678900.0)};
+insert into Test
+select element {'id':4,'gid':1,'val':double(4.32),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.3.query.sqlpp
new file mode 100644
index 0000000..c142973
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.val from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(val as val);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.1.ddl.sqlpp
new file mode 100644
index 0000000..da0bd7b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : double
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.2.update.sqlpp
new file mode 100644
index 0000000..88d820c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':double(4.32),'valplus':double(473847.0)};
+insert into Test
+select element {'id':1,'gid':1,'val':double(5.32)};
+insert into Test
+select element {'id':2,'gid':1,'val':double(6.32),'valplus':double(38473827484738239.0)};
+insert into Test
+select element {'id':3,'gid':1,'val':double(4.32),'valplus':double(678900.0)};
+insert into Test
+select element {'id':4,'gid':1,'val':double(4.32),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.3.query.sqlpp
new file mode 100644
index 0000000..9d62353
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.valplus from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(valplus as valplus);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.1.ddl.sqlpp
new file mode 100644
index 0000000..da0bd7b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : double
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.3.query.sqlpp
new file mode 100644
index 0000000..c142973
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.val from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(val as val);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.1.ddl.sqlpp
new file mode 100644
index 0000000..ddac6a0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : float
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.2.update.sqlpp
new file mode 100644
index 0000000..c83ba1c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':float('4.32'),'valplus':float('473847')};
+insert into Test
+select element {'id':1,'gid':1,'val':float('5.32')};
+insert into Test
+select element {'id':2,'gid':1,'val':float('6.32'),'valplus':float('38473827484738239')};
+insert into Test
+select element {'id':3,'gid':1,'val':float('4.32'),'valplus':float('678900')};
+insert into Test
+select element {'id':4,'gid':1,'val':float('4.32'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.3.query.sqlpp
new file mode 100644
index 0000000..c142973
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.val from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(val as val);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.1.ddl.sqlpp
new file mode 100644
index 0000000..ddac6a0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : float
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.2.update.sqlpp
new file mode 100644
index 0000000..c83ba1c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':float('4.32'),'valplus':float('473847')};
+insert into Test
+select element {'id':1,'gid':1,'val':float('5.32')};
+insert into Test
+select element {'id':2,'gid':1,'val':float('6.32'),'valplus':float('38473827484738239')};
+insert into Test
+select element {'id':3,'gid':1,'val':float('4.32'),'valplus':float('678900')};
+insert into Test
+select element {'id':4,'gid':1,'val':float('4.32'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.3.query.sqlpp
new file mode 100644
index 0000000..9d62353
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.valplus from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(valplus as valplus);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.1.ddl.sqlpp
new file mode 100644
index 0000000..0c0bfee
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : smallint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.2.update.sqlpp
new file mode 100644
index 0000000..6210af4
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':smallint('4'),'valplus':smallint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':smallint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':smallint('6'),'valplus':smallint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':smallint('4'),'valplus':smallint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':smallint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.3.query.sqlpp
new file mode 100644
index 0000000..c142973
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.val from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(val as val);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.1.ddl.sqlpp
new file mode 100644
index 0000000..0c0bfee
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : smallint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.2.update.sqlpp
new file mode 100644
index 0000000..6210af4
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':smallint('4'),'valplus':smallint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':smallint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':smallint('6'),'valplus':smallint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':smallint('4'),'valplus':smallint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':smallint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.3.query.sqlpp
new file mode 100644
index 0000000..9d62353
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.valplus from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(valplus as valplus);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.1.ddl.sqlpp
new file mode 100644
index 0000000..07312bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : integer
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.2.update.sqlpp
new file mode 100644
index 0000000..a248a0f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':integer('4'),'valplus':integer('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':integer('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':integer('6'),'valplus':integer('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':integer('4'),'valplus':integer('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':integer('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.3.query.sqlpp
new file mode 100644
index 0000000..c142973
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.val from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(val as val);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.1.ddl.sqlpp
new file mode 100644
index 0000000..07312bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : integer
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.2.update.sqlpp
new file mode 100644
index 0000000..a248a0f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':integer('4'),'valplus':integer('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':integer('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':integer('6'),'valplus':integer('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':integer('4'),'valplus':integer('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':integer('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.3.query.sqlpp
new file mode 100644
index 0000000..9d62353
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.valplus from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(valplus as valplus);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.1.ddl.sqlpp
new file mode 100644
index 0000000..5e9972c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : bigint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.2.update.sqlpp
new file mode 100644
index 0000000..b460af2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':bigint('4'),'valplus':bigint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':bigint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':bigint('6'),'valplus':bigint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':bigint('4'),'valplus':bigint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':bigint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.3.query.sqlpp
new file mode 100644
index 0000000..c142973
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.val from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(val as val);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.1.ddl.sqlpp
new file mode 100644
index 0000000..5e9972c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : bigint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.2.update.sqlpp
new file mode 100644
index 0000000..b460af2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':bigint('4'),'valplus':bigint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':bigint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':bigint('6'),'valplus':bigint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':bigint('4'),'valplus':bigint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':bigint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.3.query.sqlpp
new file mode 100644
index 0000000..9d62353
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.valplus from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(valplus as valplus);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.1.ddl.sqlpp
new file mode 100644
index 0000000..c45dbfe
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : tinyint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.2.update.sqlpp
new file mode 100644
index 0000000..5a65a20
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':tinyint('4'),'valplus':tinyint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':tinyint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':tinyint('6'),'valplus':tinyint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':tinyint('4'),'valplus':tinyint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':tinyint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.3.query.sqlpp
new file mode 100644
index 0000000..c142973
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.val from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(val as val);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.1.ddl.sqlpp
new file mode 100644
index 0000000..c45dbfe
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : tinyint
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.2.update.sqlpp
new file mode 100644
index 0000000..5a65a20
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.2.update.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':tinyint('4'),'valplus':tinyint('1')};
+insert into Test
+select element {'id':1,'gid':1,'val':tinyint('5')};
+insert into Test
+select element {'id':2,'gid':1,'val':tinyint('6'),'valplus':tinyint('2')};
+insert into Test
+select element {'id':3,'gid':1,'val':tinyint('4'),'valplus':tinyint('3')};
+insert into Test
+select element {'id':4,'gid':1,'val':tinyint('4'),'valplus':null};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.3.query.sqlpp
new file mode 100644
index 0000000..9d62353
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.3.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.valplus from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(valplus as valplus);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.1.ddl.sqlpp
new file mode 100644
index 0000000..da0bd7b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.1.ddl.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+{
+  id : bigint,
+  gid : bigint,
+  val : double
+};
+
+create  dataset Test(TestType) primary key id;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.2.update.sqlpp
new file mode 100644
index 0000000..1b4eac9
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.2.update.sqlpp
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+insert into Test
+select element {'id':0,'gid':1,'val':double(4.32),'valplus':float('2.0')};
+insert into Test
+select element {'id':1,'gid':1,'val':double(5.32),'valplus':float('1.0')};
+insert into Test
+select element {'id':2,'gid':1,'val':double(6.32),'valplus':'hello world'};
+insert into Test
+select element {'id':3,'gid':1,'val':double(4.32),'valplus':double('3.0')};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.3.query.sqlpp
new file mode 100644
index 0000000..db27904
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.3.query.sqlpp
@@ -0,0 +1,30 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+ /*
+ * Description  : Run serial-stddev over an ordered list with mixed types
+ * Expected Res : Failure
+ * Date         : March 5th 2018
+ */
+
+use test;
+
+select gid, strict_stddev((select value g.valplus from g)) as stddev
+from Test as t
+/* +hash */
+group by t.gid as gid group as g(valplus as valplus);
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double/stddev_double.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double/stddev_double.1.ddl.sqlpp
new file mode 100644
index 0000000..ad97753
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double/stddev_double.1.ddl.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double/stddev_double.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double/stddev_double.3.query.sqlpp
new file mode 100644
index 0000000..c39ca57
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double/stddev_double.3.query.sqlpp
@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+select element strict_stddev((
+    select element x
+    from  [1.0,2.0,double('3.0')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double_null/stddev_double_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double_null/stddev_double_null.1.ddl.sqlpp
new file mode 100644
index 0000000..3f2c5bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double_null/stddev_double_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : integer,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double_null/stddev_double_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double_null/stddev_double_null.3.query.sqlpp
new file mode 100644
index 0000000..b86d514
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_double_null/stddev_double_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.strict_stddev((
+    select element x.doubleField
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.1.ddl.sqlpp
new file mode 100644
index 0000000..2ae248a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.1.ddl.sqlpp
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests that avg aggregation correctly returns null for an empty stream,
+ *                  without an aggregate combiner.
+ * Success        : Yes
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.3.query.sqlpp
new file mode 100644
index 0000000..4dd9c6c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.3.query.sqlpp
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests that avg aggregation correctly returns null for an empty stream,
+ *                  without an aggregate combiner.
+ * Success        : Yes
+ */
+
+use test;
+
+
+select element test.strict_stddev((
+    select element x
+    from  [1,2,3] as x
+    where (x > 10)
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.1.ddl.sqlpp
new file mode 100644
index 0000000..c65aa35
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests that avg aggregation correctly returns null for an empty stream,
+ *                  with an aggregate combiner.
+ * Success        : Yes
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.TestType as
+ closed {
+  id : integer,
+  val : double
+};
+
+create  dataset Test(TestType) primary key id;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.3.query.sqlpp
new file mode 100644
index 0000000..c874bee
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.3.query.sqlpp
@@ -0,0 +1,31 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Description    : Tests that avg aggregation correctly returns null for an empty stream,
+ *                  with an aggregate combiner.
+ * Success        : Yes
+ */
+
+use test;
+
+
+select element test.strict_stddev((
+    select element x.val
+    from  Test as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float/stddev_float.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float/stddev_float.1.ddl.sqlpp
new file mode 100644
index 0000000..21479a2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float/stddev_float.1.ddl.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float/stddev_float.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float/stddev_float.3.query.sqlpp
new file mode 100644
index 0000000..4639508
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float/stddev_float.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+select element test.strict_stddev((
+    select element x
+    from  [test.float('1'),test.float('2'),test.float('3')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float_null/stddev_float_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float_null/stddev_float_null.1.ddl.sqlpp
new file mode 100644
index 0000000..3f2c5bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float_null/stddev_float_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : integer,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float_null/stddev_float_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float_null/stddev_float_null.3.query.sqlpp
new file mode 100644
index 0000000..0efd9c5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_float_null/stddev_float_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.strict_stddev((
+    select element x.floatField
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16/stddev_int16.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16/stddev_int16.1.ddl.sqlpp
new file mode 100644
index 0000000..21479a2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16/stddev_int16.1.ddl.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16/stddev_int16.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16/stddev_int16.3.query.sqlpp
new file mode 100644
index 0000000..58f3e41
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16/stddev_int16.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+select element test.strict_stddev((
+    select element x
+    from  [test.smallint('1'),test.smallint('2'),test.smallint('3')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.1.ddl.sqlpp
new file mode 100644
index 0000000..3f2c5bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : integer,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.3.query.sqlpp
new file mode 100644
index 0000000..7608be6
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.strict_stddev((
+    select element x.int16Field
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32/stddev_int32.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32/stddev_int32.1.ddl.sqlpp
new file mode 100644
index 0000000..21479a2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32/stddev_int32.1.ddl.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32/stddev_int32.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32/stddev_int32.3.query.sqlpp
new file mode 100644
index 0000000..90dd3b3
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32/stddev_int32.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+select element test.strict_stddev((
+    select element x
+    from  [1,2,3] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.1.ddl.sqlpp
new file mode 100644
index 0000000..3f2c5bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : integer,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.3.query.sqlpp
new file mode 100644
index 0000000..42ea3a4
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.strict_stddev((
+    select element x.int32Field
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64/stddev_int64.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64/stddev_int64.1.ddl.sqlpp
new file mode 100644
index 0000000..21479a2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64/stddev_int64.1.ddl.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64/stddev_int64.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64/stddev_int64.3.query.sqlpp
new file mode 100644
index 0000000..3c7269a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64/stddev_int64.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+select element test.strict_stddev((
+    select element x
+    from  [test.bigint('1'),test.bigint('2'),test.bigint('3')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.1.ddl.sqlpp
new file mode 100644
index 0000000..3f2c5bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : integer,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.3.query.sqlpp
new file mode 100644
index 0000000..1304170
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.strict_stddev((
+    select element x.int64Field
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8/stddev_int8.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8/stddev_int8.1.ddl.sqlpp
new file mode 100644
index 0000000..21479a2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8/stddev_int8.1.ddl.sqlpp
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8/stddev_int8.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8/stddev_int8.3.query.sqlpp
new file mode 100644
index 0000000..310f840
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8/stddev_int8.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+select element test.strict_stddev((
+    select element x
+    from  [test.tinyint('1'),test.tinyint('2'),test.tinyint('3')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.1.ddl.sqlpp
new file mode 100644
index 0000000..3f2c5bf
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.1.ddl.sqlpp
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  dataverse test if exists;
+create  dataverse test;
+
+use test;
+
+
+create type test.NumericType as
+{
+  id : integer,
+  int8Field : tinyint?,
+  int16Field : smallint?,
+  int32Field : integer?,
+  int64Field : bigint?,
+  floatField : float?,
+  doubleField : double?
+};
+
+create external  dataset Numeric(NumericType) using localfs((`path`=`asterix_nc1://data/nontagged/numericData.json`),(`format`=`adm`));
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.3.query.sqlpp
new file mode 100644
index 0000000..25f0fee
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.3.query.sqlpp
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+use test;
+
+
+{'stddev':test.strict_stddev((
+    select element x.int8Field
+    from  Numeric as x
+))};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_mixed/stddev_mixed.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_mixed/stddev_mixed.3.query.sqlpp
new file mode 100644
index 0000000..d57619d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/aggregate/stddev_mixed/stddev_mixed.3.query.sqlpp
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+* Description  : Run stddev over an ordered list with mixed types
+* Expected Res : Failure
+* Date         : March 5th 2018
+*/
+
+select element strict_stddev((
+    select element x
+    from  [float('2.0'),'hello world',93847382783847382,date('2013-01-01')] as x
+));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null/agg_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null/agg_null.1.adm
index cd777d3..53910f3 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null/agg_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null/agg_null.1.adm
@@ -1 +1 @@
-{ "sql-count1": 0, "average1": null, "sql-sum1": null, "sql-min1": null, "sql-max1": null, "sql-count2": 0, "average2": null, "sql-sum2": null, "sql-min2": null, "sql-max2": null }
+{ "sql-count1": 0, "average1": null, "sql-sum1": null, "sql-min1": null, "sql-max1": null, "sql-stddev1": null, "sql-count2": 0, "average2": null, "sql-sum2": null, "sql-min2": null, "sql-max2": null, "sql-stddev2": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null_rec/agg_null_rec.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null_rec/agg_null_rec.1.adm
index 6216cee..425ca45 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null_rec/agg_null_rec.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null_rec/agg_null_rec.1.adm
@@ -1 +1 @@
-{ "sql-count": 2, "average": 26.0, "sql-sum": 52, "sql-min": 21, "sql-max": 31 }
+{ "sql-count": 2, "average": 26.0, "sql-stddev": 7.0710678118654755, "sql-sum": 52, "sql-min": 21, "sql-max": 31 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null_rec_1/agg_null_rec.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null_rec_1/agg_null_rec.1.adm
index f9daeca..4d9b33d 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null_rec_1/agg_null_rec.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_null_rec_1/agg_null_rec.1.adm
@@ -1 +1 @@
-{ "sql-count": 3, "average": 5.32, "sql-sum": 15.96, "sql-min": 473847, "sql-max": 38473827484738239 }
+{ "sql-count": 3, "average": 5.32, "sql-sum": 15.96, "sql-stddev": 2.720510431232472E16, "sql-min": 473847, "sql-max": 38473827484738239 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_number/agg_number.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_number/agg_number.1.adm
index 74697fa..2ea1357 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_number/agg_number.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_number/agg_number.1.adm
@@ -1 +1 @@
-{ "sql-count1": 4, "average1": 2.3461845695961844E16, "sql-count2": 4, "average2": 2.3461845695961844E16, "sql-sum1": 9.3847382783847376E16, "sql-min1": 1.0, "sql-max1": 9.3847382783847376E16, "sql-sum2": 9.3847382783847376E16, "sql-min2": 1.0, "sql-max2": 9.3847382783847376E16 }
+{ "sql-count1": 4, "average1": 2.3461845695961844E16, "sql-stddev1": 4.6923691391923688E16, "sql-count2": 4, "average2": 2.3461845695961844E16, "sql-stddev2": 4.6923691391923688E16, "sql-sum1": 9.3847382783847376E16, "sql-min1": 1.0, "sql-max1": 9.3847382783847376E16, "sql-sum2": 9.3847382783847376E16, "sql-min2": 1.0, "sql-max2": 9.3847382783847376E16 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_number_rec/agg_number_rec.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_number_rec/agg_number_rec.1.adm
index e936607..fdc01c8 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_number_rec/agg_number_rec.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/agg_number_rec/agg_number_rec.1.adm
@@ -1 +1 @@
-{ "sql-count": 3, "average": 1.2824609161579424E16, "sql-sum": 3.8473827484738272E16, "sql-min": 2.0, "sql-max": 3.847382748473824E16 }
+{ "sql-count": 3, "average": 1.2824609161579424E16, "sql-stddev": 2.2212874655068836E16, "sql-sum": 3.8473827484738272E16, "sql-min": 2.0, "sql-max": 3.847382748473824E16 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/avg_int8_null/avg_int8_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/avg_int8_null/avg_int8_null.1.adm
index f68aba0..53318b6 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/avg_int8_null/avg_int8_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/avg_int8_null/avg_int8_null.1.adm
@@ -1 +1 @@
-{ "average": 48.0 }
+{ "average": 18.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/count_null/count_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/count_null/count_null.1.adm
index ed55061..3c4c7ec 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/count_null/count_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/count_null/count_null.1.adm
@@ -1 +1 @@
-{ "sql-count": 1 }
+{ "sql-count": 3 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/scalar_stddev/scalar_stddev.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/scalar_stddev/scalar_stddev.1.adm
new file mode 100644
index 0000000..325ebd5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/scalar_stddev/scalar_stddev.1.adm
@@ -0,0 +1,6 @@
+1.0
+1.0
+1.0
+1.0
+1.0
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.1.adm
new file mode 100644
index 0000000..19765bd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.1.adm
@@ -0,0 +1 @@
+null
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/scalar_stddev_null/scalar_stddev_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/scalar_stddev_null/scalar_stddev_null.1.adm
new file mode 100644
index 0000000..325ebd5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/scalar_stddev_null/scalar_stddev_null.1.adm
@@ -0,0 +1,6 @@
+1.0
+1.0
+1.0
+1.0
+1.0
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_double/serial_stddev_double.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_double/serial_stddev_double.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_double/serial_stddev_double.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.1.adm
new file mode 100644
index 0000000..c6fb3a0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 2.2212874654736076E16 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_empty/serial_stddev_empty.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_empty/serial_stddev_empty.1.adm
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_empty/serial_stddev_empty.1.adm
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_float/serial_stddev_float.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_float/serial_stddev_float.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_float/serial_stddev_float.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.1.adm
new file mode 100644
index 0000000..81fb89a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 1.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int16/serial_stddev_int16.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int16/serial_stddev_int16.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int16/serial_stddev_int16.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.1.adm
new file mode 100644
index 0000000..81fb89a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 1.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int32/serial_stddev_int32.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int32/serial_stddev_int32.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int32/serial_stddev_int32.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.1.adm
new file mode 100644
index 0000000..81fb89a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 1.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int64/serial_stddev_int64.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int64/serial_stddev_int64.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int64/serial_stddev_int64.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.1.adm
new file mode 100644
index 0000000..81fb89a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 1.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int8/serial_stddev_int8.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int8/serial_stddev_int8.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int8/serial_stddev_int8.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.1.adm
new file mode 100644
index 0000000..81fb89a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 1.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.1.adm
new file mode 100644
index 0000000..e3b97f5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/serial_stddev_mixed/serial_stddev_mixed.1.adm
@@ -0,0 +1 @@
+[  ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_double/stddev_double.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_double/stddev_double.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_double/stddev_double.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_double_null/stddev_double_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_double_null/stddev_double_null.1.adm
new file mode 100644
index 0000000..74efe52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_double_null/stddev_double_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": 0.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_empty_01/stddev_empty_01.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_empty_01/stddev_empty_01.1.adm
new file mode 100644
index 0000000..19765bd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_empty_01/stddev_empty_01.1.adm
@@ -0,0 +1 @@
+null
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_empty_02/stddev_empty_02.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_empty_02/stddev_empty_02.1.adm
new file mode 100644
index 0000000..19765bd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_empty_02/stddev_empty_02.1.adm
@@ -0,0 +1 @@
+null
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_float/stddev_float.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_float/stddev_float.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_float/stddev_float.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_float_null/stddev_float_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_float_null/stddev_float_null.1.adm
new file mode 100644
index 0000000..74efe52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_float_null/stddev_float_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": 0.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int16/stddev_int16.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int16/stddev_int16.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int16/stddev_int16.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int16_null/stddev_int16_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int16_null/stddev_int16_null.1.adm
new file mode 100644
index 0000000..74efe52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int16_null/stddev_int16_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": 0.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int32/stddev_int32.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int32/stddev_int32.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int32/stddev_int32.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int32_null/stddev_int32_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int32_null/stddev_int32_null.1.adm
new file mode 100644
index 0000000..74efe52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int32_null/stddev_int32_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": 0.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int64/stddev_int64.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int64/stddev_int64.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int64/stddev_int64.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int64_null/stddev_int64_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int64_null/stddev_int64_null.1.adm
new file mode 100644
index 0000000..74efe52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int64_null/stddev_int64_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": 0.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int8/stddev_int8.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int8/stddev_int8.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int8/stddev_int8.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int8_null/stddev_int8_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int8_null/stddev_int8_null.1.adm
new file mode 100644
index 0000000..43cef5a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_int8_null/stddev_int8_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": 26.0 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_mixed/stddev_mixed.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_mixed/stddev_mixed.1.adm
new file mode 100644
index 0000000..e3b97f5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/stddev_mixed/stddev_mixed.1.adm
@@ -0,0 +1 @@
+[  ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_double_null/sum_double_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_double_null/sum_double_null.1.adm
index d28b910..42dde1e 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_double_null/sum_double_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_double_null/sum_double_null.1.adm
@@ -1 +1 @@
-64.0
+192.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_float_null/sum_float_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_float_null/sum_float_null.1.adm
index d28b910..42dde1e 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_float_null/sum_float_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_float_null/sum_float_null.1.adm
@@ -1 +1 @@
-64.0
+192.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int16_null/sum_int16_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int16_null/sum_int16_null.1.adm
index cfb8613..0534f01 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int16_null/sum_int16_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int16_null/sum_int16_null.1.adm
@@ -1 +1 @@
--16
+-48
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int32_null/sum_int32_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int32_null/sum_int32_null.1.adm
index 078f335..bab6f0f 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int32_null/sum_int32_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int32_null/sum_int32_null.1.adm
@@ -1 +1 @@
--32
+-96
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int64_null/sum_int64_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int64_null/sum_int64_null.1.adm
index c049878..24a20ab 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int64_null/sum_int64_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int64_null/sum_int64_null.1.adm
@@ -1 +1 @@
--64
+-192
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int8_null/sum_int8_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int8_null/sum_int8_null.1.adm
index 21e72e8..fb1e7bc 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int8_null/sum_int8_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate-sql/sum_int8_null/sum_int8_null.1.adm
@@ -1 +1 @@
-48
+54
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null/agg_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null/agg_null.1.adm
index d37d47d..979beb0 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null/agg_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null/agg_null.1.adm
@@ -1 +1 @@
-{ "count1": 1, "average1": null, "sum1": null, "min1": null, "max1": null, "count2": 2, "average2": null, "sum2": null, "min2": null, "max2": null }
+{ "count1": 1, "average1": null, "sum1": null, "min1": null, "max1": null, "stddev1": null, "count2": 2, "average2": null, "sum2": null, "min2": null, "max2": null, "stddev2": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null_rec/agg_null_rec.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null_rec/agg_null_rec.1.adm
index 1ae8184..7f18cac 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null_rec/agg_null_rec.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null_rec/agg_null_rec.1.adm
@@ -1 +1 @@
-{ "count": 3, "average": null, "sum": null, "min": null, "max": null }
+{ "count": 3, "average": null, "stddev": null, "sum": null, "min": null, "max": null }
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null_rec_1/agg_null_rec.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null_rec_1/agg_null_rec.1.adm
index b702acf..683f829 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null_rec_1/agg_null_rec.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_null_rec_1/agg_null_rec.1.adm
@@ -1 +1 @@
-{ "count": 3, "average": 5.32, "sum": 15.96, "min": null, "max": null }
+{ "count": 3, "average": 5.32, "sum": 15.96, "stddev": 1.0, "min": null, "max": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_number/agg_number.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_number/agg_number.1.adm
index 514f114..7ac56d4 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_number/agg_number.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_number/agg_number.1.adm
@@ -1 +1 @@
-{ "count1": 4, "average1": 2.3461845695961844E16, "count2": 4, "average2": 2.3461845695961844E16, "sum1": 9.3847382783847376E16, "min1": 1.0, "max1": 9.3847382783847376E16, "sum2": 9.3847382783847376E16, "min2": 1.0, "max2": 9.3847382783847376E16 }
+{ "count1": 4, "average1": 2.3461845695961844E16, "stddev1": 4.6923691391923688E16, "count2": 4, "average2": 2.3461845695961844E16, "stddev2": 4.6923691391923688E16, "sum1": 9.3847382783847376E16, "min1": 1.0, "max1": 9.3847382783847376E16, "sum2": 9.3847382783847376E16, "min2": 1.0, "max2": 9.3847382783847376E16 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_number_rec/agg_number_rec.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_number_rec/agg_number_rec.1.adm
index 0f8001b..2e68a7b 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_number_rec/agg_number_rec.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/agg_number_rec/agg_number_rec.1.adm
@@ -1 +1 @@
-{ "count": 3, "average": 1.2824609161579424E16, "sum": 3.8473827484738272E16, "min": 2.0, "max": 3.847382748473824E16 }
+{ "count": 3, "average": 1.2824609161579424E16, "stddev": 2.2212874655068836E16, "sum": 3.8473827484738272E16, "min": 2.0, "max": 3.847382748473824E16 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/count_null/count_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/count_null/count_null.1.adm
index c13b5ec..402310d 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/count_null/count_null.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/count_null/count_null.1.adm
@@ -1 +1 @@
-{ "count": 2 }
+{ "count": 4 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/scalar_stddev/scalar_stddev.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/scalar_stddev/scalar_stddev.1.adm
new file mode 100644
index 0000000..325ebd5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/scalar_stddev/scalar_stddev.1.adm
@@ -0,0 +1,6 @@
+1.0
+1.0
+1.0
+1.0
+1.0
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/scalar_stddev_empty/scalar_stddev_empty.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/scalar_stddev_empty/scalar_stddev_empty.1.adm
new file mode 100644
index 0000000..19765bd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/scalar_stddev_empty/scalar_stddev_empty.1.adm
@@ -0,0 +1 @@
+null
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/scalar_stddev_null/scalar_stddev_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/scalar_stddev_null/scalar_stddev_null.1.adm
new file mode 100644
index 0000000..aef8b7f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/scalar_stddev_null/scalar_stddev_null.1.adm
@@ -0,0 +1,6 @@
+null
+null
+null
+null
+null
+null
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_double/serial_stddev_double.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_double/serial_stddev_double.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_double/serial_stddev_double.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_double_null/serial_stddev_double_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_double_null/serial_stddev_double_null.1.adm
new file mode 100644
index 0000000..c65635a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_double_null/serial_stddev_double_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_empty/serial_stddev_empty.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_empty/serial_stddev_empty.1.adm
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_empty/serial_stddev_empty.1.adm
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_float/serial_stddev_float.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_float/serial_stddev_float.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_float/serial_stddev_float.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_float_null/serial_stddev_float_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_float_null/serial_stddev_float_null.1.adm
new file mode 100644
index 0000000..c65635a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_float_null/serial_stddev_float_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int16/serial_stddev_int16.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int16/serial_stddev_int16.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int16/serial_stddev_int16.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.1.adm
new file mode 100644
index 0000000..c65635a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int32/serial_stddev_int32.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int32/serial_stddev_int32.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int32/serial_stddev_int32.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.1.adm
new file mode 100644
index 0000000..c65635a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int64/serial_stddev_int64.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int64/serial_stddev_int64.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int64/serial_stddev_int64.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.1.adm
new file mode 100644
index 0000000..c65635a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int8/serial_stddev_int8.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int8/serial_stddev_int8.1.adm
new file mode 100644
index 0000000..d2bef52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int8/serial_stddev_int8.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": 0.8944271909999159 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.1.adm
new file mode 100644
index 0000000..c65635a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_mixed/serial_stddev_mixed.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_mixed/serial_stddev_mixed.1.adm
new file mode 100644
index 0000000..c65635a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/serial_stddev_mixed/serial_stddev_mixed.1.adm
@@ -0,0 +1 @@
+{ "gid": 1, "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_double/stddev_double.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_double/stddev_double.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_double/stddev_double.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_double_null/stddev_double_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_double_null/stddev_double_null.1.adm
new file mode 100644
index 0000000..f41cf92
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_double_null/stddev_double_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_empty_01/stddev_empty_01.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_empty_01/stddev_empty_01.1.adm
new file mode 100644
index 0000000..19765bd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_empty_01/stddev_empty_01.1.adm
@@ -0,0 +1 @@
+null
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_empty_02/stddev_empty_02.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_empty_02/stddev_empty_02.1.adm
new file mode 100644
index 0000000..19765bd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_empty_02/stddev_empty_02.1.adm
@@ -0,0 +1 @@
+null
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_float/stddev_float.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_float/stddev_float.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_float/stddev_float.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_float_null/stddev_float_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_float_null/stddev_float_null.1.adm
new file mode 100644
index 0000000..f41cf92
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_float_null/stddev_float_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int16/stddev_int16.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int16/stddev_int16.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int16/stddev_int16.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int16_null/stddev_int16_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int16_null/stddev_int16_null.1.adm
new file mode 100644
index 0000000..f41cf92
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int16_null/stddev_int16_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int32/stddev_int32.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int32/stddev_int32.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int32/stddev_int32.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int32_null/stddev_int32_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int32_null/stddev_int32_null.1.adm
new file mode 100644
index 0000000..f41cf92
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int32_null/stddev_int32_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int64/stddev_int64.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int64/stddev_int64.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int64/stddev_int64.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int64_null/stddev_int64_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int64_null/stddev_int64_null.1.adm
new file mode 100644
index 0000000..f41cf92
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int64_null/stddev_int64_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int8/stddev_int8.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int8/stddev_int8.1.adm
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int8/stddev_int8.1.adm
@@ -0,0 +1 @@
+1.0
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int8_null/stddev_int8_null.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int8_null/stddev_int8_null.1.adm
new file mode 100644
index 0000000..f41cf92
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_int8_null/stddev_int8_null.1.adm
@@ -0,0 +1 @@
+{ "stddev": null }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_mixed/stddev_mixed.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_mixed/stddev_mixed.1.adm
new file mode 100644
index 0000000..e3b97f5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/aggregate/stddev_mixed/stddev_mixed.1.adm
@@ -0,0 +1 @@
+[  ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/scan/numeric_types_01/numeric_types_01.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/scan/numeric_types_01/numeric_types_01.1.adm
index 28b2cf2..dd0aeec 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results/scan/numeric_types_01/numeric_types_01.1.adm
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/scan/numeric_types_01/numeric_types_01.1.adm
@@ -1,2 +1,4 @@
-{ "id": 10, "int8Field": 48, "int16Field": -16, "int32Field": -32, "int64Field": -64, "floatField": 64.0, "doubleField": 64.0, "int8Field2": 48, "int16Field2": 16, "int32Field2": 32, "int64Field2": 64, "int8Field3": 48, "int16Field3": 16, "int32Field3": 32, "int64Field3": 64, "int8Field4": -48, "int16Field4": -16, "int32Field4": -32, "int64Field4": -64, "floatco2": 0.64, "doubleco2": 0.64, "floatco3": 64.1, "doubleco3": 64.1, "floatco4": 4.9999999E10, "doubleco4": 5.0E10, "floatco5": 4.9999999E10, "doubleco5": 5.0E10, "floatco6": 5.0E-10, "doubleco6": 5.0E-10 }
+{ "id": 8, "int8Field": 48, "int16Field": -16, "int32Field": -32, "int64Field": -64, "floatField": 64.0, "doubleField": 64.0, "int8Field2": 48, "int16Field2": 16, "int32Field2": 32, "int64Field2": 64, "int8Field3": 48, "int16Field3": 16, "int32Field3": 32, "int64Field3": 64, "int8Field4": -48, "int16Field4": -16, "int32Field4": -32, "int64Field4": -64, "floatco2": 0.64, "doubleco2": 0.64, "floatco3": 64.1, "doubleco3": 64.1, "floatco4": 4.9999999E10, "doubleco4": 5.0E10, "floatco5": 4.9999999E10, "doubleco5": 5.0E10, "floatco6": 5.0E-10, "doubleco6": 5.0E-10 }
+{ "id": 9, "int8Field": 2, "int16Field": -16, "int32Field": -32, "int64Field": -64, "floatField": 64.0, "doubleField": 64.0, "int8Field2": 48, "int16Field2": 16, "int32Field2": 32, "int64Field2": 64, "int8Field3": 48, "int16Field3": 16, "int32Field3": 32, "int64Field3": 64, "int8Field4": -48, "int16Field4": -16, "int32Field4": -32, "int64Field4": -64, "floatco2": 0.64, "doubleco2": 0.64, "floatco3": 64.1, "doubleco3": 64.1, "floatco4": 4.9999999E10, "doubleco4": 5.0E10, "floatco5": 4.9999999E10, "doubleco5": 5.0E10, "floatco6": 5.0E-10, "doubleco6": 5.0E-10 }
+{ "id": 10, "int8Field": 4, "int16Field": -16, "int32Field": -32, "int64Field": -64, "floatField": 64.0, "doubleField": 64.0, "int8Field2": 48, "int16Field2": 16, "int32Field2": 32, "int64Field2": 64, "int8Field3": 48, "int16Field3": 16, "int32Field3": 32, "int64Field3": 64, "int8Field4": -48, "int16Field4": -16, "int32Field4": -32, "int64Field4": -64, "floatco2": 0.64, "doubleco2": 0.64, "floatco3": 64.1, "doubleco3": 64.1, "floatco4": 4.9999999E10, "doubleco4": 5.0E10, "floatco5": 4.9999999E10, "doubleco5": 5.0E10, "floatco6": 5.0E-10, "doubleco6": 5.0E-10 }
 { "id": 11 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null/agg_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null/agg_null.3.ast
index cde56f7..7405394 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null/agg_null.3.ast
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null/agg_null.3.ast
@@ -46,6 +46,15 @@
     ]
   )
   (
+    LiteralExpr [STRING] [sql-stddev1]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      OrderedListConstructor [
+        LiteralExpr [NULL]
+      ]
+    ]
+  )
+  (
     LiteralExpr [STRING] [sql-count2]
     :
     FunctionCall asterix.sql-count@1[
@@ -95,4 +104,14 @@
       ]
     ]
   )
+  (
+    LiteralExpr [STRING] [sql-stddev2]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      UnorderedListConstructor [
+        LiteralExpr [NULL]
+        LiteralExpr [NULL]
+      ]
+    ]
+  )
 ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null_rec/agg_null_rec.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null_rec/agg_null_rec.3.ast
index 05a76b7..167b753 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null_rec/agg_null_rec.3.ast
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null_rec/agg_null_rec.3.ast
@@ -96,4 +96,23 @@
       )
     ]
   )
+  (
+    LiteralExpr [STRING] [sql-stddev]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$t ]
+          Field=valplus
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Test]
+          ]
+          AS Variable [ Name=$t ]
+        ]
+      )
+    ]
+  )
 ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.ast
index 99a39ac..97c3cfa 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.ast
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_null_rec_1/agg_null_rec_1.3.ast
@@ -121,4 +121,30 @@
       )
     ]
   )
+  (
+    LiteralExpr [STRING] [sql-stddev]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$i ]
+          Field=valplus
+        ]
+        ]
+        FROM [          (
+            SELECT ELEMENT [
+            Variable [ Name=$t ]
+            ]
+            FROM [              FunctionCall asterix.dataset@1[
+                LiteralExpr [STRING] [test.Test]
+              ]
+              AS Variable [ Name=$t ]
+            ]
+          )
+          AS Variable [ Name=$i ]
+        ]
+      )
+    ]
+  )
 ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_number/agg_number.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_number/agg_number.3.ast
index 14ac395..bfa0267 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_number/agg_number.3.ast
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_number/agg_number.3.ast
@@ -81,6 +81,22 @@
     ]
   )
   (
+    LiteralExpr [STRING] [sql-stddev1]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      OrderedListConstructor [
+        FunctionCall null.float@1[
+          LiteralExpr [STRING] [2.0]
+        ]
+        FunctionCall null.double@1[
+          LiteralExpr [STRING] [3.0]
+        ]
+        LiteralExpr [LONG] [93847382783847382]
+        LiteralExpr [LONG] [1]
+      ]
+    ]
+  )
+  (
     LiteralExpr [STRING] [sql-count2]
     :
     FunctionCall asterix.sql-count@1[
@@ -160,4 +176,20 @@
       ]
     ]
   )
+  (
+    LiteralExpr [STRING] [sql-stddev2]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      UnorderedListConstructor [
+        FunctionCall null.float@1[
+          LiteralExpr [STRING] [2.0]
+        ]
+        FunctionCall null.double@1[
+          LiteralExpr [STRING] [3.0]
+        ]
+        LiteralExpr [LONG] [93847382783847382]
+        LiteralExpr [LONG] [1]
+      ]
+    ]
+  )
 ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_number_rec/agg_number_rec.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_number_rec/agg_number_rec.3.ast
index 05a76b7..167b753 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_number_rec/agg_number_rec.3.ast
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/agg_number_rec/agg_number_rec.3.ast
@@ -96,4 +96,23 @@
       )
     ]
   )
+  (
+    LiteralExpr [STRING] [sql-stddev]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$t ]
+          Field=valplus
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Test]
+          ]
+          AS Variable [ Name=$t ]
+        ]
+      )
+    ]
+  )
 ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.3.ast
new file mode 100644
index 0000000..a206740
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev/scalar_stddev.3.ast
@@ -0,0 +1,105 @@
+DataverseUse test
+Query:
+Let Variable [ Name=$i8 ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+Let Variable [ Name=$i16 ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+Let Variable [ Name=$i32 ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+Let Variable [ Name=$i64 ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+Let Variable [ Name=$f ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+Let Variable [ Name=$d ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+SELECT ELEMENT [
+Variable [ Name=$i ]
+]
+FROM [  OrderedListConstructor [
+    Variable [ Name=$i8 ]
+    Variable [ Name=$i16 ]
+    Variable [ Name=$i32 ]
+    Variable [ Name=$i64 ]
+    Variable [ Name=$f ]
+    Variable [ Name=$d ]
+  ]
+  AS Variable [ Name=$i ]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.3.ast
new file mode 100644
index 0000000..6954f95
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_empty/scalar_stddev_empty.3.ast
@@ -0,0 +1,7 @@
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.sql-stddev@1[
+  OrderedListConstructor [
+  ]
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.3.ast
new file mode 100644
index 0000000..61692e0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/scalar_stddev_null/scalar_stddev_null.3.ast
@@ -0,0 +1,111 @@
+DataverseUse test
+Query:
+Let Variable [ Name=$i8 ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+Let Variable [ Name=$i16 ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+Let Variable [ Name=$i32 ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+Let Variable [ Name=$i64 ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+Let Variable [ Name=$f ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+Let Variable [ Name=$d ]
+  :=
+  FunctionCall asterix.sql-stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+SELECT ELEMENT [
+Variable [ Name=$i ]
+]
+FROM [  OrderedListConstructor [
+    Variable [ Name=$i8 ]
+    Variable [ Name=$i16 ]
+    Variable [ Name=$i32 ]
+    Variable [ Name=$i64 ]
+    Variable [ Name=$f ]
+    Variable [ Name=$d ]
+  ]
+  AS Variable [ Name=$i ]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.1.ast
new file mode 100644
index 0000000..a61c9df
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : double
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.3.ast
new file mode 100644
index 0000000..3bd59ff
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double/serial_stddev_double.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.1.ast
new file mode 100644
index 0000000..a61c9df
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : double
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.3.ast
new file mode 100644
index 0000000..8dae584
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_double_null/serial_stddev_double_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.1.ast
new file mode 100644
index 0000000..a61c9df
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : double
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.3.ast
new file mode 100644
index 0000000..3bd59ff
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_empty/serial_stddev_empty.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.1.ast
new file mode 100644
index 0000000..9af248f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : float
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.3.ast
new file mode 100644
index 0000000..3bd59ff
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float/serial_stddev_float.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.1.ast
new file mode 100644
index 0000000..9af248f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : float
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.3.ast
new file mode 100644
index 0000000..8dae584
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_float_null/serial_stddev_float_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.1.ast
new file mode 100644
index 0000000..16d25a8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : smallint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.3.ast
new file mode 100644
index 0000000..3bd59ff
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16/serial_stddev_int16.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.1.ast
new file mode 100644
index 0000000..16d25a8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : smallint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.3.ast
new file mode 100644
index 0000000..8dae584
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int16_null/serial_stddev_int16_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.1.ast
new file mode 100644
index 0000000..6eaf31a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : integer
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.3.ast
new file mode 100644
index 0000000..3bd59ff
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32/serial_stddev_int32.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.1.ast
new file mode 100644
index 0000000..6eaf31a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : integer
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.3.ast
new file mode 100644
index 0000000..8dae584
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int32_null/serial_stddev_int32_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.1.ast
new file mode 100644
index 0000000..7911712
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : bigint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.3.ast
new file mode 100644
index 0000000..3bd59ff
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64/serial_stddev_int64.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.1.ast
new file mode 100644
index 0000000..7911712
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : bigint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.3.ast
new file mode 100644
index 0000000..8dae584
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int64_null/serial_stddev_int64_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.1.ast
new file mode 100644
index 0000000..44c9cde
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : tinyint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.3.ast
new file mode 100644
index 0000000..3bd59ff
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8/serial_stddev_int8.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.1.ast
new file mode 100644
index 0000000..44c9cde
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : tinyint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.3.ast
new file mode 100644
index 0000000..8dae584
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_int8_null/serial_stddev_int8_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      FieldAccessor [
+        Variable [ Name=#2 ]
+        Field=t
+      ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=#1 ]
+      AS Variable [ Name=#2 ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=#1 ]
+  (
+    t:=Variable [ Name=$t ]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_int64_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_int64_null.1.ast
new file mode 100644
index 0000000..a61c9df
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_int64_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : double
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_int64_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_int64_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_int64_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_int64_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_int64_null.3.ast
new file mode 100644
index 0000000..8a897bc
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/serial_stddev_mixed/serial_stddev_int64_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    valplus:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [valplus]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double/stddev_double.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double/stddev_double.1.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double/stddev_double.1.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double/stddev_double.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double/stddev_double.3.ast
new file mode 100644
index 0000000..c0e7dac
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double/stddev_double.3.ast
@@ -0,0 +1,19 @@
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        LiteralExpr [DOUBLE] [1.0]
+        LiteralExpr [DOUBLE] [2.0]
+        FunctionCall null.double@1[
+          LiteralExpr [STRING] [3.0]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.1.ast
new file mode 100644
index 0000000..2b387f8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : integer,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.3.ast
new file mode 100644
index 0000000..e01f5cc
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_double_null/stddev_double_null.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=doubleField
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.3.ast
new file mode 100644
index 0000000..f85f450
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_01/stddev_empty_01.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        LiteralExpr [LONG] [1]
+        LiteralExpr [LONG] [2]
+        LiteralExpr [LONG] [3]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+    Where
+      OperatorExpr [
+        Variable [ Name=$x ]
+        >
+        LiteralExpr [LONG] [10]
+      ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.1.ast
new file mode 100644
index 0000000..baf977e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.1.ast
@@ -0,0 +1,8 @@
+DataverseUse test
+TypeDecl TestType [
+  closed RecordType {
+    id : bigint,
+    val : double
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.3.ast
new file mode 100644
index 0000000..1e74018
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_empty_02/stddev_empty_02.3.ast
@@ -0,0 +1,19 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$x ]
+      Field=val
+    ]
+    ]
+    FROM [      FunctionCall asterix.dataset@1[
+        LiteralExpr [STRING] [test.Test]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float/stddev_float.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float/stddev_float.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float/stddev_float.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float/stddev_float.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float/stddev_float.3.ast
new file mode 100644
index 0000000..139a799
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float/stddev_float.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall test.float@1[
+          LiteralExpr [STRING] [1]
+        ]
+        FunctionCall test.float@1[
+          LiteralExpr [STRING] [2]
+        ]
+        FunctionCall test.float@1[
+          LiteralExpr [STRING] [3]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.1.ast
new file mode 100644
index 0000000..b01283e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : bigint,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.3.ast
new file mode 100644
index 0000000..2fd1ef4
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_float_null/stddev_float_nu.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=floatField
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16/stddev_int16.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16/stddev_int16.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16/stddev_int16.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16/stddev_int16.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16/stddev_int16.3.ast
new file mode 100644
index 0000000..e1d4be2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16/stddev_int16.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall test.int16@1[
+          LiteralExpr [STRING] [1]
+        ]
+        FunctionCall test.int16@1[
+          LiteralExpr [STRING] [2]
+        ]
+        FunctionCall test.int16@1[
+          LiteralExpr [STRING] [3]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.1.ast
new file mode 100644
index 0000000..b01283e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : bigint,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.3.ast
new file mode 100644
index 0000000..ee1fdc7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int16_null/stddev_int16_null.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=int16Field
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32/stddev_int32.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32/stddev_int32.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32/stddev_int32.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32/stddev_int32.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32/stddev_int32.3.ast
new file mode 100644
index 0000000..d40a004
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32/stddev_int32.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall test.int32@1[
+          LiteralExpr [STRING] [1]
+        ]
+        FunctionCall test.int32@1[
+          LiteralExpr [STRING] [2]
+        ]
+        FunctionCall test.int32@1[
+          LiteralExpr [STRING] [3]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.1.ast
new file mode 100644
index 0000000..b01283e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : bigint,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.3.ast
new file mode 100644
index 0000000..55da89c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int32_null/stddev_int32_null.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=int32Field
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64/stddev_int64.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64/stddev_int64.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64/stddev_int64.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64/stddev_int64.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64/stddev_int64.3.ast
new file mode 100644
index 0000000..0583b7f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64/stddev_int64.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall test.int64@1[
+          LiteralExpr [STRING] [1]
+        ]
+        FunctionCall test.int64@1[
+          LiteralExpr [STRING] [2]
+        ]
+        FunctionCall test.int64@1[
+          LiteralExpr [STRING] [3]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.1.ast
new file mode 100644
index 0000000..b01283e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : bigint,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.3.ast
new file mode 100644
index 0000000..e8787dd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int64_null/stddev_int64_null.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=int64Field
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8/stddev_int8.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8/stddev_int8.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8/stddev_int8.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8/stddev_int8.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8/stddev_int8.3.ast
new file mode 100644
index 0000000..2ec6818
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8/stddev_int8.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall test.int8@1[
+          LiteralExpr [STRING] [1]
+        ]
+        FunctionCall test.int8@1[
+          LiteralExpr [STRING] [2]
+        ]
+        FunctionCall test.int8@1[
+          LiteralExpr [STRING] [3]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.1.ast
new file mode 100644
index 0000000..b01283e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : bigint,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.3.ast
new file mode 100644
index 0000000..a7c371c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_int8_null/stddev_int8_null.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.sql-stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=int8Field
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_mixed/stddev_mixed.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_mixed/stddev_mixed.3.ast
new file mode 100644
index 0000000..14781dd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate-sql/stddev_mixed/stddev_mixed.3.ast
@@ -0,0 +1,22 @@
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.sql-stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall null.float@1[
+          LiteralExpr [STRING] [2.0]
+        ]
+        LiteralExpr [STRING] [hello world]
+        LiteralExpr [LONG] [93847382783847382]
+        FunctionCall null.date@1[
+          LiteralExpr [STRING] [2013-01-01]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null/agg_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null/agg_null.3.ast
index d5ab72c..42aab0a 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null/agg_null.3.ast
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null/agg_null.3.ast
@@ -46,6 +46,15 @@
     ]
   )
   (
+    LiteralExpr [STRING] [stddev1]
+    :
+    FunctionCall asterix.stddev@1[
+      OrderedListConstructor [
+        LiteralExpr [NULL]
+      ]
+    ]
+  )
+  (
     LiteralExpr [STRING] [count2]
     :
     FunctionCall asterix.count@1[
@@ -95,4 +104,14 @@
       ]
     ]
   )
+  (
+    LiteralExpr [STRING] [stddev2]
+    :
+    FunctionCall asterix.stddev@1[
+      UnorderedListConstructor [
+        LiteralExpr [NULL]
+        LiteralExpr [NULL]
+      ]
+    ]
+  )
 ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null_rec/agg_null_rec.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null_rec/agg_null_rec.3.ast
index f2fe7a8..ea96a9a 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null_rec/agg_null_rec.3.ast
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null_rec/agg_null_rec.3.ast
@@ -96,4 +96,23 @@
       )
     ]
   )
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$t ]
+          Field=valplus
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Test]
+          ]
+          AS Variable [ Name=$t ]
+        ]
+      )
+    ]
+  )
 ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null_rec_1/agg_null_rec_1.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null_rec_1/agg_null_rec_1.3.ast
index f7d2b25..5668cdb 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null_rec_1/agg_null_rec_1.3.ast
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_null_rec_1/agg_null_rec_1.3.ast
@@ -121,4 +121,31 @@
       )
     ]
   )
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$i ]
+          Field=val
+        ]
+        ]
+        FROM [          (
+            SELECT ELEMENT [
+            Variable [ Name=$t ]
+            ]
+            FROM [              FunctionCall asterix.dataset@1[
+                LiteralExpr [STRING] [test.Test]
+              ]
+              AS Variable [ Name=$t ]
+            ]
+          )
+          AS Variable [ Name=$i ]
+        ]
+      )
+    ]
+  )
 ]
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_number/agg_number.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_number/agg_number.3.ast
index 7a0b73c..c3f8e5b 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_number/agg_number.3.ast
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_number/agg_number.3.ast
@@ -81,6 +81,22 @@
     ]
   )
   (
+    LiteralExpr [STRING] [stddev1]
+    :
+    FunctionCall asterix.stddev@1[
+      OrderedListConstructor [
+        FunctionCall null.float@1[
+          LiteralExpr [STRING] [2.0]
+        ]
+        FunctionCall null.double@1[
+          LiteralExpr [STRING] [3.0]
+        ]
+        LiteralExpr [LONG] [93847382783847382]
+        LiteralExpr [LONG] [1]
+      ]
+    ]
+  )
+  (
     LiteralExpr [STRING] [count2]
     :
     FunctionCall asterix.count@1[
@@ -160,4 +176,20 @@
       ]
     ]
   )
+  (
+    LiteralExpr [STRING] [stddev2]
+    :
+    FunctionCall asterix.stddev@1[
+      OrderedListConstructor [
+        FunctionCall null.float@1[
+          LiteralExpr [STRING] [2.0]
+        ]
+        FunctionCall null.double@1[
+          LiteralExpr [STRING] [3.0]
+        ]
+        LiteralExpr [LONG] [93847382783847382]
+        LiteralExpr [LONG] [1]
+      ]
+    ]
+  )
 ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_number_rec/agg_number_rec.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_number_rec/agg_number_rec.3.ast
index f2fe7a8..ea96a9a 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_number_rec/agg_number_rec.3.ast
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/agg_number_rec/agg_number_rec.3.ast
@@ -96,4 +96,23 @@
       )
     ]
   )
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$t ]
+          Field=valplus
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Test]
+          ]
+          AS Variable [ Name=$t ]
+        ]
+      )
+    ]
+  )
 ]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev/scalar_stddev.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev/scalar_stddev.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev/scalar_stddev.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev/scalar_stddev.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev/scalar_stddev.3.ast
new file mode 100644
index 0000000..67d038e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev/scalar_stddev.3.ast
@@ -0,0 +1,105 @@
+DataverseUse test
+Query:
+Let Variable [ Name=$i8 ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+Let Variable [ Name=$i16 ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+Let Variable [ Name=$i32 ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+Let Variable [ Name=$i64 ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+Let Variable [ Name=$f ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+Let Variable [ Name=$d ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [3]
+      ]
+    ]
+  ]
+SELECT ELEMENT [
+Variable [ Name=$i ]
+]
+FROM [  OrderedListConstructor [
+    Variable [ Name=$i8 ]
+    Variable [ Name=$i16 ]
+    Variable [ Name=$i32 ]
+    Variable [ Name=$i64 ]
+    Variable [ Name=$f ]
+    Variable [ Name=$d ]
+  ]
+  AS Variable [ Name=$i ]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.3.ast
new file mode 100644
index 0000000..9834bb3
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_empty/scalar_stddev_empty.3.ast
@@ -0,0 +1,7 @@
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.stddev@1[
+  OrderedListConstructor [
+  ]
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.3.ast
new file mode 100644
index 0000000..eac0b48
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/scalar_stddev_null/scalar_stddev_null.3.ast
@@ -0,0 +1,111 @@
+DataverseUse test
+Query:
+Let Variable [ Name=$i8 ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int8@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+Let Variable [ Name=$i16 ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int16@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+Let Variable [ Name=$i32 ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int32@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+Let Variable [ Name=$i64 ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.int64@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+Let Variable [ Name=$f ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.float@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+Let Variable [ Name=$d ]
+  :=
+  FunctionCall asterix.stddev@1[
+    OrderedListConstructor [
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [1]
+      ]
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [2]
+      ]
+      FunctionCall test.double@1[
+        LiteralExpr [STRING] [3]
+      ]
+      LiteralExpr [NULL]
+    ]
+  ]
+SELECT ELEMENT [
+Variable [ Name=$i ]
+]
+FROM [  OrderedListConstructor [
+    Variable [ Name=$i8 ]
+    Variable [ Name=$i16 ]
+    Variable [ Name=$i32 ]
+    Variable [ Name=$i64 ]
+    Variable [ Name=$f ]
+    Variable [ Name=$d ]
+  ]
+  AS Variable [ Name=$i ]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.1.ast
new file mode 100644
index 0000000..a61c9df
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : double
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.3.ast
new file mode 100644
index 0000000..43263e5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double/serial_stddev_double.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    val:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [val]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.1.ast
new file mode 100644
index 0000000..a61c9df
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : double
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.3.ast
new file mode 100644
index 0000000..f05d552
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_double_null/serial_stddev_double_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    valplus:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [valplus]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.1.ast
new file mode 100644
index 0000000..a61c9df
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : double
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.3.ast
new file mode 100644
index 0000000..43263e5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_empty/serial_stddev_empty.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    val:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [val]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.1.ast
new file mode 100644
index 0000000..9af248f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : float
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.3.ast
new file mode 100644
index 0000000..43263e5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float/serial_stddev_float.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    val:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [val]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.1.ast
new file mode 100644
index 0000000..9af248f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : float
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.3.ast
new file mode 100644
index 0000000..f05d552
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_float_null/serial_stddev_float_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    valplus:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [valplus]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.1.ast
new file mode 100644
index 0000000..16d25a8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : smallint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.3.ast
new file mode 100644
index 0000000..43263e5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16/serial_stddev_int16.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    val:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [val]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.1.ast
new file mode 100644
index 0000000..16d25a8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : smallint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.3.ast
new file mode 100644
index 0000000..f05d552
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int16_null/serial_stddev_int16_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    valplus:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [valplus]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.1.ast
new file mode 100644
index 0000000..6eaf31a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : integer
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.3.ast
new file mode 100644
index 0000000..43263e5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32/serial_stddev_int32.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    val:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [val]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.1.ast
new file mode 100644
index 0000000..6eaf31a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : integer
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.3.ast
new file mode 100644
index 0000000..f05d552
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int32_null/serial_stddev_int32_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    valplus:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [valplus]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.1.ast
new file mode 100644
index 0000000..7911712
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : bigint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.3.ast
new file mode 100644
index 0000000..43263e5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64/serial_stddev_int64.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    val:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [val]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.1.ast
new file mode 100644
index 0000000..7911712
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : bigint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.3.ast
new file mode 100644
index 0000000..f05d552
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int64_null/serial_stddev_int64_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    valplus:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [valplus]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.1.ast
new file mode 100644
index 0000000..44c9cde
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : tinyint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.3.ast
new file mode 100644
index 0000000..43263e5
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8/serial_stddev_int8.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=val
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    val:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [val]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.1.ast
new file mode 100644
index 0000000..44c9cde
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : tinyint
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.3.ast
new file mode 100644
index 0000000..f05d552
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_int8_null/serial_stddev_int8_null.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    valplus:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [valplus]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.1.ast
new file mode 100644
index 0000000..a61c9df
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.1.ast
@@ -0,0 +1,9 @@
+DataverseUse test
+TypeDecl TestType [
+  open RecordType {
+    id : bigint,
+    gid : bigint,
+    val : double
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.2.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.2.ast
new file mode 100644
index 0000000..916a59e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.2.ast
@@ -0,0 +1 @@
+DataverseUse test
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.3.ast
new file mode 100644
index 0000000..f05d552
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/serial_stddev_mixed/serial_stddev_mixed.3.ast
@@ -0,0 +1,40 @@
+DataverseUse test
+Query:
+SELECT [
+Variable [ Name=$gid ]
+gid
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$g ]
+      Field=valplus
+    ]
+    ]
+    FROM [      Variable [ Name=$g ]
+      AS Variable [ Name=$g ]
+    ]
+  )
+]
+stddev
+]
+FROM [  FunctionCall asterix.dataset@1[
+    LiteralExpr [STRING] [test.Test]
+  ]
+  AS Variable [ Name=$t ]
+]
+Groupby
+  Variable [ Name=$gid ]
+  :=
+  FieldAccessor [
+    Variable [ Name=$t ]
+    Field=gid
+  ]
+  GROUP AS Variable [ Name=$g ]
+  (
+    valplus:=FunctionCall asterix.field-access-by-name@2[
+  Variable [ Name=$t ]
+  LiteralExpr [STRING] [valplus]
+]
+  )
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double/stddev_double.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double/stddev_double.1.ast
new file mode 100644
index 0000000..086bc5f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double/stddev_double.1.ast
@@ -0,0 +1,2 @@
+DataverseUse test
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double/stddev_double.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double/stddev_double.3.ast
new file mode 100644
index 0000000..b2fcbe8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double/stddev_double.3.ast
@@ -0,0 +1,19 @@
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        LiteralExpr [DOUBLE] [1.0]
+        LiteralExpr [DOUBLE] [2.0]
+        FunctionCall null.double@1[
+          LiteralExpr [STRING] [3.0]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double_null/stddev_double_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double_null/stddev_double_null.1.ast
new file mode 100644
index 0000000..2b387f8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double_null/stddev_double_null.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : integer,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double_null/stddev_double_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double_null/stddev_double_null.3.ast
new file mode 100644
index 0000000..433f0bc
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_double_null/stddev_double_null.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=doubleField
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.3.ast
new file mode 100644
index 0000000..fe21498
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_01/stddev_empty_01.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        LiteralExpr [LONG] [1]
+        LiteralExpr [LONG] [2]
+        LiteralExpr [LONG] [3]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+    Where
+      OperatorExpr [
+        Variable [ Name=$x ]
+        >
+        LiteralExpr [LONG] [10]
+      ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.1.ast
new file mode 100644
index 0000000..babcce4
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.1.ast
@@ -0,0 +1,8 @@
+DataverseUse test
+TypeDecl TestType [
+  closed RecordType {
+    id : integer,
+    val : double
+  }
+]
+DatasetDecl Test(TestType) partitioned by [[id]]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.3.ast
new file mode 100644
index 0000000..6cb121c
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_empty_02/stddev_empty_02.3.ast
@@ -0,0 +1,19 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    FieldAccessor [
+      Variable [ Name=$x ]
+      Field=val
+    ]
+    ]
+    FROM [      FunctionCall asterix.dataset@1[
+        LiteralExpr [STRING] [test.Test]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float/stddev_float.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float/stddev_float.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float/stddev_float.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float/stddev_float.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float/stddev_float.3.ast
new file mode 100644
index 0000000..07e5c1a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float/stddev_float.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall test.float@1[
+          LiteralExpr [STRING] [1]
+        ]
+        FunctionCall test.float@1[
+          LiteralExpr [STRING] [2]
+        ]
+        FunctionCall test.float@1[
+          LiteralExpr [STRING] [3]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float_null/stddev_float_nu.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float_null/stddev_float_nu.1.ast
new file mode 100644
index 0000000..2b387f8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float_null/stddev_float_nu.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : integer,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float_null/stddev_float_nu.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float_null/stddev_float_nu.3.ast
new file mode 100644
index 0000000..f78dba8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_float_null/stddev_float_nu.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=floatField
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16/stddev_int16.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16/stddev_int16.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16/stddev_int16.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16/stddev_int16.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16/stddev_int16.3.ast
new file mode 100644
index 0000000..67d7880
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16/stddev_int16.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall test.int16@1[
+          LiteralExpr [STRING] [1]
+        ]
+        FunctionCall test.int16@1[
+          LiteralExpr [STRING] [2]
+        ]
+        FunctionCall test.int16@1[
+          LiteralExpr [STRING] [3]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.1.ast
new file mode 100644
index 0000000..2b387f8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : integer,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.3.ast
new file mode 100644
index 0000000..9f82ab2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int16_null/stddev_int16_null.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=int16Field
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32/stddev_int32.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32/stddev_int32.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32/stddev_int32.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32/stddev_int32.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32/stddev_int32.3.ast
new file mode 100644
index 0000000..f8eb00d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32/stddev_int32.3.ast
@@ -0,0 +1,18 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        LiteralExpr [LONG] [1]
+        LiteralExpr [LONG] [2]
+        LiteralExpr [LONG] [3]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.1.ast
new file mode 100644
index 0000000..2b387f8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : integer,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.3.ast
new file mode 100644
index 0000000..8863b52
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int32_null/stddev_int32_null.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=int32Field
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64/stddev_int64.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64/stddev_int64.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64/stddev_int64.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64/stddev_int64.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64/stddev_int64.3.ast
new file mode 100644
index 0000000..5ddf2ae
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64/stddev_int64.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall test.int64@1[
+          LiteralExpr [STRING] [1]
+        ]
+        FunctionCall test.int64@1[
+          LiteralExpr [STRING] [2]
+        ]
+        FunctionCall test.int64@1[
+          LiteralExpr [STRING] [3]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.1.ast
new file mode 100644
index 0000000..2b387f8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : integer,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.3.ast
new file mode 100644
index 0000000..490ab20
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int64_null/stddev_int64_null.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=int64Field
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8/stddev_int8.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8/stddev_int8.1.ast
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8/stddev_int8.1.ast
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8/stddev_int8.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8/stddev_int8.3.ast
new file mode 100644
index 0000000..ca12465
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8/stddev_int8.3.ast
@@ -0,0 +1,24 @@
+DataverseUse test
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall test.int8@1[
+          LiteralExpr [STRING] [1]
+        ]
+        FunctionCall test.int8@1[
+          LiteralExpr [STRING] [2]
+        ]
+        FunctionCall test.int8@1[
+          LiteralExpr [STRING] [3]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.1.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.1.ast
new file mode 100644
index 0000000..2b387f8
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.1.ast
@@ -0,0 +1,13 @@
+DataverseUse test
+TypeDecl NumericType [
+  open RecordType {
+    id : integer,
+    int8Field : tinyint?,
+    int16Field : smallint?,
+    int32Field : integer?,
+    int64Field : bigint?,
+    floatField : float?,
+    doubleField : double?
+  }
+]
+DatasetDecl Numeric(NumericType)is an external dataset
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.3.ast
new file mode 100644
index 0000000..65e8156
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_int8_null/stddev_int8_null.3.ast
@@ -0,0 +1,23 @@
+DataverseUse test
+Query:
+RecordConstructor [
+  (
+    LiteralExpr [STRING] [stddev]
+    :
+    FunctionCall asterix.stddev@1[
+      (
+        SELECT ELEMENT [
+        FieldAccessor [
+          Variable [ Name=$x ]
+          Field=int8Field
+        ]
+        ]
+        FROM [          FunctionCall asterix.dataset@1[
+            LiteralExpr [STRING] [test.Numeric]
+          ]
+          AS Variable [ Name=$x ]
+        ]
+      )
+    ]
+  )
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_mixed/stddev_mixed.3.ast b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_mixed/stddev_mixed.3.ast
new file mode 100644
index 0000000..6661e1d
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results_parser_sqlpp/aggregate/stddev_mixed/stddev_mixed.3.ast
@@ -0,0 +1,22 @@
+Query:
+SELECT ELEMENT [
+FunctionCall asterix.stddev@1[
+  (
+    SELECT ELEMENT [
+    Variable [ Name=$x ]
+    ]
+    FROM [      OrderedListConstructor [
+        FunctionCall null.float@1[
+          LiteralExpr [STRING] [2.0]
+        ]
+        LiteralExpr [STRING] [hello world]
+        LiteralExpr [LONG] [93847382783847382]
+        FunctionCall null.date@1[
+          LiteralExpr [STRING] [2013-01-01]
+        ]
+      ]
+      AS Variable [ Name=$x ]
+    ]
+  )
+]
+]
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
index 164fbf1..3236e62 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
@@ -206,6 +206,18 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_mixed">
+        <output-dir compare="Text">stddev_mixed</output-dir>
+        <expected-error>Type incompatibility: function agg-stddev gets incompatible input values: string and float</expected-error>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_mixed">
+        <output-dir compare="Text">serial_stddev_mixed</output-dir>
+        <expected-error>Type incompatibility: function agg-stddev gets incompatible input values: string and float</expected-error>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
       <compilation-unit name="agg_number">
         <output-dir compare="Text">agg_number</output-dir>
       </compilation-unit>
@@ -522,6 +534,21 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate">
+      <compilation-unit name="scalar_stddev">
+        <output-dir compare="Text">scalar_stddev</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="scalar_stddev_empty">
+        <output-dir compare="Text">scalar_stddev_empty</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="scalar_stddev_null">
+        <output-dir compare="Text">scalar_stddev_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
       <compilation-unit name="scalar_sum">
         <output-dir compare="Text">scalar_sum</output-dir>
       </compilation-unit>
@@ -537,6 +564,141 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_double">
+        <output-dir compare="Text">serial_stddev_double</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_double_null">
+        <output-dir compare="Text">serial_stddev_double_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_empty">
+        <output-dir compare="Text">serial_stddev_empty</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_float">
+        <output-dir compare="Text">serial_stddev_float</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_float_null">
+        <output-dir compare="Text">serial_stddev_float_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int16">
+        <output-dir compare="Text">serial_stddev_int16</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int16_null">
+        <output-dir compare="Text">serial_stddev_int16_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int32">
+        <output-dir compare="Text">serial_stddev_int32</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int32_null">
+        <output-dir compare="Text">serial_stddev_int32_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int64">
+        <output-dir compare="Text">serial_stddev_int64</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int64_null">
+        <output-dir compare="Text">serial_stddev_int64_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int8">
+        <output-dir compare="Text">serial_stddev_int8</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int8_null">
+        <output-dir compare="Text">serial_stddev_int8_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_double">
+        <output-dir compare="Text">stddev_double</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_double_null">
+        <output-dir compare="Text">stddev_double_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_empty_01">
+        <output-dir compare="Text">stddev_empty_01</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_empty_02">
+        <output-dir compare="Text">stddev_empty_02</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_float">
+        <output-dir compare="Text">stddev_float</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_float_null">
+        <output-dir compare="Text">stddev_float_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int16">
+        <output-dir compare="Text">stddev_int16</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int16_null">
+        <output-dir compare="Text">stddev_int16_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int32">
+        <output-dir compare="Text">stddev_int32</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int32_null">
+        <output-dir compare="Text">stddev_int32_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int64">
+        <output-dir compare="Text">stddev_int64</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int64_null">
+        <output-dir compare="Text">stddev_int64_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int8">
+        <output-dir compare="Text">stddev_int8</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int8_null">
+        <output-dir compare="Text">stddev_int8_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
       <compilation-unit name="sum_double">
         <output-dir compare="Text">sum_double</output-dir>
       </compilation-unit>
@@ -667,6 +829,18 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_mixed">
+        <output-dir compare="Text">serial_stddev_mixed</output-dir>
+        <expected-error>Invalid item type: function agg-stddev cannot process item type string in an input array (or multiset)</expected-error>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_mixed">
+        <output-dir compare="Text">stddev_mixed</output-dir>
+        <expected-error>Type incompatibility: function agg-stddev gets incompatible input values: string and float</expected-error>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
       <compilation-unit name="agg_number">
         <output-dir compare="Text">agg_number</output-dir>
       </compilation-unit>
@@ -912,6 +1086,21 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate-sql">
+      <compilation-unit name="scalar_stddev">
+        <output-dir compare="Text">scalar_stddev</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="scalar_stddev_empty">
+        <output-dir compare="Text">scalar_stddev_empty</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="scalar_stddev_null">
+        <output-dir compare="Text">scalar_stddev_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
       <compilation-unit name="scalar_sum">
         <output-dir compare="Text">scalar_sum</output-dir>
       </compilation-unit>
@@ -927,6 +1116,141 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_double">
+        <output-dir compare="Text">serial_stddev_double</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_double_null">
+        <output-dir compare="Text">serial_stddev_double_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_empty">
+        <output-dir compare="Text">serial_stddev_empty</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_float">
+        <output-dir compare="Text">serial_stddev_float</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_float_null">
+        <output-dir compare="Text">serial_stddev_float_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int16">
+        <output-dir compare="Text">serial_stddev_int16</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int16_null">
+        <output-dir compare="Text">serial_stddev_int16_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int32">
+        <output-dir compare="Text">serial_stddev_int32</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int32_null">
+        <output-dir compare="Text">serial_stddev_int32_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int64">
+        <output-dir compare="Text">serial_stddev_int64</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int64_null">
+        <output-dir compare="Text">serial_stddev_int64_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int8">
+        <output-dir compare="Text">serial_stddev_int8</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int8_null">
+        <output-dir compare="Text">serial_stddev_int8_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_double">
+        <output-dir compare="Text">stddev_double</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_double_null">
+        <output-dir compare="Text">stddev_double_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_empty_01">
+        <output-dir compare="Text">stddev_empty_01</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_empty_02">
+        <output-dir compare="Text">stddev_empty_02</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_float">
+        <output-dir compare="Text">stddev_float</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_float_null">
+        <output-dir compare="Text">stddev_float_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int16">
+        <output-dir compare="Text">stddev_int16</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int16_null">
+        <output-dir compare="Text">stddev_int16_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int32">
+        <output-dir compare="Text">stddev_int32</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int32_null">
+        <output-dir compare="Text">stddev_int32_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int64">
+        <output-dir compare="Text">stddev_int64</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int64_null">
+        <output-dir compare="Text">stddev_int64_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int8">
+        <output-dir compare="Text">stddev_int8</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int8_null">
+        <output-dir compare="Text">stddev_int8_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
       <compilation-unit name="sum_double">
         <output-dir compare="Text">sum_double</output-dir>
       </compilation-unit>
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp_parser.xml b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp_parser.xml
index 010a6cc..f1cf5bb 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp_parser.xml
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp_parser.xml
@@ -122,6 +122,18 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_mixed">
+        <output-dir compare="AST">stddev_mixed</output-dir>
+        <expected-error>org.apache.asterix.common.exceptions.AsterixException</expected-error>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_mixed">
+        <output-dir compare="AST">serial_stddev_mixed</output-dir>
+        <expected-error>org.apache.asterix.common.exceptions.AsterixException</expected-error>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
       <compilation-unit name="agg_number">
         <output-dir compare="AST">agg_number</output-dir>
       </compilation-unit>
@@ -418,6 +430,21 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate">
+      <compilation-unit name="scalar_stddev">
+        <output-dir compare="AST">scalar_stddev</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="scalar_stddev_empty">
+        <output-dir compare="AST">scalar_stddev_empty</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="scalar_stddev_null">
+        <output-dir compare="AST">scalar_stddev_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
       <compilation-unit name="scalar_sum">
         <output-dir compare="AST">scalar_sum</output-dir>
       </compilation-unit>
@@ -433,6 +460,146 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int8_null">
+        <output-dir compare="AST">serial_stddev_int8_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_double">
+        <output-dir compare="AST">serial_stddev_double</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_double_null">
+        <output-dir compare="AST">serial_stddev_double_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_empty">
+        <output-dir compare="AST">serial_stddev_empty</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_float">
+        <output-dir compare="AST">serial_stddev_float</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_float_null">
+        <output-dir compare="AST">serial_stddev_float_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int16">
+        <output-dir compare="AST">serial_stddev_int16</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int16_null">
+        <output-dir compare="AST">serial_stddev_int16_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int32">
+        <output-dir compare="AST">serial_stddev_int32</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int32_null">
+        <output-dir compare="AST">serial_stddev_int32_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int64">
+        <output-dir compare="AST">serial_stddev_int64</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int64_null">
+        <output-dir compare="AST">serial_stddev_int64_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_int8">
+        <output-dir compare="AST">serial_stddev_int8</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="serial_stddev_pop_int8_null">
+        <output-dir compare="AST">serial_stddev_pop_int8_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_double">
+        <output-dir compare="AST">stddev_double</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_double_null">
+        <output-dir compare="AST">stddev_double_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_empty_01">
+        <output-dir compare="AST">stddev_empty_01</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_empty_02">
+        <output-dir compare="AST">stddev_empty_02</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_float">
+        <output-dir compare="AST">stddev_float</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_float_null">
+        <output-dir compare="AST">stddev_float_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int16">
+        <output-dir compare="AST">stddev_int16</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int16_null">
+        <output-dir compare="AST">stddev_int16_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int32">
+        <output-dir compare="AST">stddev_int32</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int32_null">
+        <output-dir compare="AST">stddev_int32_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int64">
+        <output-dir compare="AST">stddev_int64</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int64_null">
+        <output-dir compare="AST">stddev_int64_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int8">
+        <output-dir compare="AST">stddev_int8</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
+      <compilation-unit name="stddev_int8_null">
+        <output-dir compare="AST">stddev_int8_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate">
       <compilation-unit name="sum_double">
         <output-dir compare="AST">sum_double</output-dir>
       </compilation-unit>
@@ -558,6 +725,18 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_mixed">
+        <output-dir compare="AST">serial_stddev_mixed</output-dir>
+        <expected-error>org.apache.asterix.common.exceptions.AsterixException</expected-error>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_mixed">
+        <output-dir compare="AST">stddev_mixed</output-dir>
+        <expected-error>org.apache.asterix.common.exceptions.AsterixException</expected-error>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
       <compilation-unit name="agg_number">
         <output-dir compare="AST">agg_number</output-dir>
       </compilation-unit>
@@ -773,6 +952,21 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate-sql">
+      <compilation-unit name="scalar_stddev">
+        <output-dir compare="AST">scalar_stddev</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="scalar_stddev_empty">
+        <output-dir compare="AST">scalar_stddev_empty</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="scalar_stddev_null">
+        <output-dir compare="AST">scalar_stddev_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
       <compilation-unit name="scalar_sum">
         <output-dir compare="AST">scalar_sum</output-dir>
       </compilation-unit>
@@ -788,6 +982,141 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_double">
+        <output-dir compare="AST">serial_stddev_double</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_double_null">
+        <output-dir compare="AST">serial_stddev_double_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_empty">
+        <output-dir compare="AST">serial_stddev_empty</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_float">
+        <output-dir compare="AST">serial_stddev_float</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_float_null">
+        <output-dir compare="AST">serial_stddev_float_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int16">
+        <output-dir compare="AST">serial_stddev_int16</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int16_null">
+        <output-dir compare="AST">serial_stddev_int16_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int32">
+        <output-dir compare="AST">serial_stddev_int32</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int32_null">
+        <output-dir compare="AST">serial_stddev_int32_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int64">
+        <output-dir compare="AST">serial_stddev_int64</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int64_null">
+        <output-dir compare="AST">serial_stddev_int64_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int8">
+        <output-dir compare="AST">serial_stddev_int8</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="serial_stddev_int8_null">
+        <output-dir compare="AST">serial_stddev_int8_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_double">
+        <output-dir compare="AST">stddev_double</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_double_null">
+        <output-dir compare="AST">stddev_double_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_empty_01">
+        <output-dir compare="AST">stddev_empty_01</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_empty_02">
+        <output-dir compare="AST">stddev_empty_02</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_float">
+        <output-dir compare="AST">stddev_float</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_float_null">
+        <output-dir compare="AST">stddev_float_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int16">
+        <output-dir compare="AST">stddev_int16</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int16_null">
+        <output-dir compare="AST">stddev_int16_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int32">
+        <output-dir compare="AST">stddev_int32</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int32_null">
+        <output-dir compare="AST">stddev_int32_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int64">
+        <output-dir compare="AST">stddev_int64</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int64_null">
+        <output-dir compare="AST">stddev_int64_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int8">
+        <output-dir compare="AST">stddev_int8</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
+      <compilation-unit name="stddev_int8_null">
+        <output-dir compare="AST">stddev_int8_null</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="aggregate-sql">
       <compilation-unit name="sum_double">
         <output-dir compare="AST">sum_double</output-dir>
       </compilation-unit>
diff --git a/asterixdb/asterix-doc/src/main/markdown/builtins/9_aggregate_sql.md b/asterixdb/asterix-doc/src/main/markdown/builtins/9_aggregate_sql.md
index 921bc7e..2036bc4 100644
--- a/asterixdb/asterix-doc/src/main/markdown/builtins/9_aggregate_sql.md
+++ b/asterixdb/asterix-doc/src/main/markdown/builtins/9_aggregate_sql.md
@@ -110,7 +110,7 @@
         6.9
 
 
-### array_sql_min ###
+### array_min ###
  * Syntax:
 
         array_min(num_collection)
@@ -168,6 +168,34 @@
         3.4
 
 
+### array_stddev ###
+
+ * Syntax:
+
+        array_stddev(num_collection)
+
+ * Gets the standard deviation value of the non-null and non-missing numeric items in the given collection.
+ * Arguments:
+    * `num_collection` could be:
+        * an `array` or `multiset` containing numeric values, `null`s or `missing`s,
+        * or, a `null` value,
+        * or, a `missing` value.
+ * Return Value:
+    * a `double` value representing the average of the non-null and non-missing numbers in the given collection,
+    * `null` is returned if the input is `null` or `missing`,
+    * `null` is returned if the given collection does not contain any non-null and non-missing items,
+    * any other non-array and non-multiset input value will cause a type error,
+    * any other non-numeric value in the input collection will cause a type error.
+
+ * Example:
+
+        array_stddev( [1.2, 2.3, 3.4, 0, null] );
+
+ * The expected result is:
+
+        1.4591664287073858
+
+
 ### strict_count ###
  * Syntax:
 
@@ -214,7 +242,7 @@
 
  * The expected result is:
 
-        [ 200.0 ]
+        200.0
 
 ### strict_sum ###
  * Syntax:
@@ -243,7 +271,7 @@
 
         600
 
-### array_min ###
+### strict_min ###
  * Syntax:
 
         strict_min(num_collection)
@@ -272,7 +300,7 @@
         5.0
 
 
-### array_max ###
+### strict_max ###
  * Syntax:
 
         strict_max(num_collection)
@@ -300,3 +328,27 @@
 
         100.0
 
+### strict_stddev ###
+ * Syntax:
+
+        strict_stddev(num_collection)
+
+ * Gets the standard deviation value of the numeric items in the given collection.
+ * Arguments:
+    * `num_collection` could be:
+        * an `array` or `multiset` containing numeric values, `null`s or `missing`s,
+        * or, a `null` value,
+        * or, a `missing` value.
+ * Return Value:
+    * a `double` value representing the average of the numbers in the given collection,
+    * `null` is returned if the input is `null` or `missing`,
+    * `null` is returned if there is a `null` or `missing` in the input collection,
+    * any other non-numeric value in the input collection will cause a type error.
+
+ * Example:
+
+        strict_stddev( [100, 200, 300] );
+
+ * The expected result is:
+
+        100.0
diff --git a/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/functions/BuiltinFunctions.java b/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/functions/BuiltinFunctions.java
index f2be330..910c159 100644
--- a/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/functions/BuiltinFunctions.java
+++ b/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/functions/BuiltinFunctions.java
@@ -81,6 +81,7 @@
 import org.apache.asterix.om.typecomputer.impl.IfNullTypeComputer;
 import org.apache.asterix.om.typecomputer.impl.InjectFailureTypeComputer;
 import org.apache.asterix.om.typecomputer.impl.LocalAvgTypeComputer;
+import org.apache.asterix.om.typecomputer.impl.LocalSingleVarStatisticsTypeComputer;
 import org.apache.asterix.om.typecomputer.impl.MinMaxAggTypeComputer;
 import org.apache.asterix.om.typecomputer.impl.MissingIfTypeComputer;
 import org.apache.asterix.om.typecomputer.impl.NonTaggedGetItemResultType;
@@ -468,6 +469,14 @@
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-first-element", 1);
     public static final FunctionIdentifier LOCAL_FIRST_ELEMENT =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-local-first-element", 1);
+    public static final FunctionIdentifier STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-stddev", 1);
+    public static final FunctionIdentifier GLOBAL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-global-stddev", 1);
+    public static final FunctionIdentifier INTERMEDIATE_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-intermediate-stddev", 1);
+    public static final FunctionIdentifier LOCAL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-local-stddev", 1);
 
     public static final FunctionIdentifier SCALAR_AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "avg", 1);
     public static final FunctionIdentifier SCALAR_COUNT =
@@ -481,6 +490,12 @@
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "local-avg", 1);
     public static final FunctionIdentifier SCALAR_FIRST_ELEMENT =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "first-element", 1);
+    public static final FunctionIdentifier SCALAR_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "stddev", 1);
+    public static final FunctionIdentifier SCALAR_GLOBAL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "global-stddev", 1);
+    public static final FunctionIdentifier SCALAR_LOCAL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "local-stddev", 1);
 
     // serializable aggregate functions
     public static final FunctionIdentifier SERIAL_AVG =
@@ -497,6 +512,14 @@
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "local-avg-serial", 1);
     public static final FunctionIdentifier SERIAL_INTERMEDIATE_AVG =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "intermediate-avg-serial", 1);
+    public static final FunctionIdentifier SERIAL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "stddev-serial", 1);
+    public static final FunctionIdentifier SERIAL_GLOBAL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "global-stddev-serial", 1);
+    public static final FunctionIdentifier SERIAL_LOCAL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "local-stddev-serial", 1);
+    public static final FunctionIdentifier SERIAL_INTERMEDIATE_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "intermediate-stddev-serial", 1);
 
     // distinct aggregate functions
     public static final FunctionIdentifier COUNT_DISTINCT =
@@ -543,6 +566,14 @@
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-global-sql-avg", 1);
     public static final FunctionIdentifier LOCAL_SQL_AVG =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-local-sql-avg", 1);
+    public static final FunctionIdentifier SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-sql-stddev", 1);
+    public static final FunctionIdentifier INTERMEDIATE_SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "intermediate-agg-sql-stddev", 1);
+    public static final FunctionIdentifier GLOBAL_SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-global-sql-stddev", 1);
+    public static final FunctionIdentifier LOCAL_SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "agg-local-sql-stddev", 1);
 
     public static final FunctionIdentifier SCALAR_SQL_AVG =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "sql-avg", 1);
@@ -558,6 +589,12 @@
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "global-sql-avg", 1);
     public static final FunctionIdentifier SCALAR_LOCAL_SQL_AVG =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "local-sql-avg", 1);
+    public static final FunctionIdentifier SCALAR_SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "sql-stddev", 1);
+    public static final FunctionIdentifier SCALAR_GLOBAL_SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "global-sql-stddev", 1);
+    public static final FunctionIdentifier SCALAR_LOCAL_SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "local-sql-stddev", 1);
 
     // serializable sql aggregate functions
     public static final FunctionIdentifier SERIAL_SQL_AVG =
@@ -574,6 +611,14 @@
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "intermediate-sql-avg-serial", 1);
     public static final FunctionIdentifier SERIAL_LOCAL_SQL_AVG =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "local-sql-avg-serial", 1);
+    public static final FunctionIdentifier SERIAL_SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "sql-stddev-serial", 1);
+    public static final FunctionIdentifier SERIAL_GLOBAL_SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "global-sql-stddev-serial", 1);
+    public static final FunctionIdentifier SERIAL_INTERMEDIATE_SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "intermediate-sql-stddev-serial", 1);
+    public static final FunctionIdentifier SERIAL_LOCAL_SQL_STDDEV =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "local-sql-stddev-serial", 1);
 
     // distinct sql aggregate functions
     public static final FunctionIdentifier SQL_COUNT_DISTINCT =
@@ -1333,6 +1378,9 @@
         addPrivateFunction(SCALAR_FIRST_ELEMENT, CollectionMemberResultType.INSTANCE, true);
         addPrivateFunction(FIRST_ELEMENT, PropagateTypeComputer.INSTANCE, true);
         addPrivateFunction(LOCAL_FIRST_ELEMENT, PropagateTypeComputer.INSTANCE, true);
+        addPrivateFunction(LOCAL_STDDEV, LocalSingleVarStatisticsTypeComputer.INSTANCE, true);
+        addFunction(STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(GLOBAL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
 
         addPrivateFunction(SERIAL_SQL_AVG, NullableDoubleTypeComputer.INSTANCE, true);
         addPrivateFunction(SERIAL_SQL_COUNT, AInt64TypeComputer.INSTANCE, true);
@@ -1349,6 +1397,14 @@
         addFunction(SCALAR_MIN, ScalarVersionOfAggregateResultType.INSTANCE, true);
         addFunction(SCALAR_SUM, ScalarVersionOfAggregateResultType.INSTANCE, true);
         addPrivateFunction(INTERMEDIATE_AVG, LocalAvgTypeComputer.INSTANCE, true);
+        addFunction(SCALAR_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(SCALAR_GLOBAL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(SCALAR_LOCAL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(INTERMEDIATE_STDDEV, LocalSingleVarStatisticsTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_SQL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_GLOBAL_SQL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_LOCAL_SQL_STDDEV, LocalSingleVarStatisticsTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_INTERMEDIATE_SQL_STDDEV, LocalSingleVarStatisticsTypeComputer.INSTANCE, true);
 
         addFunction(SQL_AVG, NullableDoubleTypeComputer.INSTANCE, true);
         addPrivateFunction(GLOBAL_SQL_AVG, NullableDoubleTypeComputer.INSTANCE, true);
@@ -1369,6 +1425,13 @@
         addFunction(SCALAR_SQL_MIN, ScalarVersionOfAggregateResultType.INSTANCE, true);
         addFunction(SCALAR_SQL_SUM, ScalarVersionOfAggregateResultType.INSTANCE, true);
         addPrivateFunction(INTERMEDIATE_SQL_AVG, LocalAvgTypeComputer.INSTANCE, true);
+        addFunction(SQL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(GLOBAL_SQL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(LOCAL_SQL_STDDEV, LocalSingleVarStatisticsTypeComputer.INSTANCE, true);
+        addPrivateFunction(INTERMEDIATE_SQL_STDDEV, LocalSingleVarStatisticsTypeComputer.INSTANCE, true);
+        addFunction(SCALAR_SQL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(SCALAR_GLOBAL_SQL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(SCALAR_LOCAL_SQL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
 
         addPrivateFunction(SERIAL_AVG, NullableDoubleTypeComputer.INSTANCE, true);
         addPrivateFunction(SERIAL_COUNT, AInt64TypeComputer.INSTANCE, true);
@@ -1377,6 +1440,10 @@
         addPrivateFunction(SERIAL_INTERMEDIATE_AVG, LocalAvgTypeComputer.INSTANCE, true);
         addPrivateFunction(SERIAL_SUM, NumericAggTypeComputer.INSTANCE, true);
         addPrivateFunction(SERIAL_LOCAL_SUM, NumericAggTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_GLOBAL_STDDEV, NullableDoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_LOCAL_STDDEV, LocalSingleVarStatisticsTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_INTERMEDIATE_STDDEV, LocalSingleVarStatisticsTypeComputer.INSTANCE, true);
 
         // Distinct aggregate functions
 
@@ -1727,6 +1794,33 @@
         addDistinctAgg(MAX_DISTINCT, SCALAR_MAX);
         addScalarAgg(MAX_DISTINCT, SCALAR_MAX_DISTINCT);
 
+        // STDDEV
+
+        addAgg(STDDEV);
+        addAgg(LOCAL_STDDEV);
+        addAgg(GLOBAL_STDDEV);
+        addLocalAgg(STDDEV, LOCAL_STDDEV);
+        addIntermediateAgg(STDDEV, INTERMEDIATE_STDDEV);
+        addIntermediateAgg(LOCAL_STDDEV, INTERMEDIATE_STDDEV);
+        addIntermediateAgg(GLOBAL_STDDEV, INTERMEDIATE_STDDEV);
+        addGlobalAgg(STDDEV, GLOBAL_STDDEV);
+
+        addScalarAgg(STDDEV, SCALAR_STDDEV);
+        addScalarAgg(GLOBAL_STDDEV, SCALAR_GLOBAL_STDDEV);
+        addScalarAgg(LOCAL_STDDEV, SCALAR_LOCAL_STDDEV);
+
+        addSerialAgg(STDDEV, SERIAL_STDDEV);
+        addSerialAgg(LOCAL_STDDEV, SERIAL_LOCAL_STDDEV);
+        addSerialAgg(GLOBAL_STDDEV, SERIAL_GLOBAL_STDDEV);
+        addAgg(SERIAL_STDDEV);
+        addAgg(SERIAL_LOCAL_STDDEV);
+        addAgg(SERIAL_GLOBAL_STDDEV);
+        addLocalAgg(SERIAL_STDDEV, SERIAL_LOCAL_STDDEV);
+        addIntermediateAgg(SERIAL_STDDEV, SERIAL_INTERMEDIATE_STDDEV);
+        addIntermediateAgg(SERIAL_LOCAL_STDDEV, SERIAL_INTERMEDIATE_STDDEV);
+        addIntermediateAgg(SERIAL_GLOBAL_STDDEV, SERIAL_INTERMEDIATE_STDDEV);
+        addGlobalAgg(SERIAL_STDDEV, SERIAL_GLOBAL_STDDEV);
+
         // FIRST_ELEMENT
 
         addAgg(SCALAR_FIRST_ELEMENT);
@@ -1811,6 +1905,33 @@
         addIntermediateAgg(SERIAL_GLOBAL_SQL_AVG, SERIAL_INTERMEDIATE_SQL_AVG);
         addGlobalAgg(SERIAL_SQL_AVG, SERIAL_GLOBAL_SQL_AVG);
 
+        // SQL STDDEV
+
+        addAgg(SQL_STDDEV);
+        addAgg(LOCAL_SQL_STDDEV);
+        addAgg(GLOBAL_SQL_STDDEV);
+        addLocalAgg(SQL_STDDEV, LOCAL_SQL_STDDEV);
+        addIntermediateAgg(SQL_STDDEV, INTERMEDIATE_SQL_STDDEV);
+        addIntermediateAgg(LOCAL_SQL_STDDEV, INTERMEDIATE_SQL_STDDEV);
+        addIntermediateAgg(GLOBAL_SQL_STDDEV, INTERMEDIATE_SQL_STDDEV);
+        addGlobalAgg(SQL_STDDEV, GLOBAL_SQL_STDDEV);
+
+        addScalarAgg(SQL_STDDEV, SCALAR_SQL_STDDEV);
+        addScalarAgg(GLOBAL_SQL_STDDEV, SCALAR_GLOBAL_SQL_STDDEV);
+        addScalarAgg(LOCAL_SQL_STDDEV, SCALAR_LOCAL_SQL_STDDEV);
+
+        addSerialAgg(SQL_STDDEV, SERIAL_SQL_STDDEV);
+        addSerialAgg(LOCAL_SQL_STDDEV, SERIAL_LOCAL_SQL_STDDEV);
+        addSerialAgg(GLOBAL_SQL_STDDEV, SERIAL_GLOBAL_SQL_STDDEV);
+        addAgg(SERIAL_SQL_STDDEV);
+        addAgg(SERIAL_LOCAL_SQL_STDDEV);
+        addAgg(SERIAL_GLOBAL_SQL_STDDEV);
+        addLocalAgg(SERIAL_SQL_STDDEV, SERIAL_LOCAL_SQL_STDDEV);
+        addIntermediateAgg(SERIAL_SQL_STDDEV, SERIAL_INTERMEDIATE_SQL_STDDEV);
+        addIntermediateAgg(SERIAL_LOCAL_SQL_STDDEV, SERIAL_INTERMEDIATE_SQL_STDDEV);
+        addIntermediateAgg(SERIAL_GLOBAL_SQL_STDDEV, SERIAL_INTERMEDIATE_SQL_STDDEV);
+        addGlobalAgg(SERIAL_SQL_STDDEV, SERIAL_GLOBAL_SQL_STDDEV);
+
         // SQL AVG DISTINCT
 
         addDistinctAgg(SQL_AVG_DISTINCT, SCALAR_SQL_AVG);
diff --git a/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/typecomputer/impl/LocalSingleVarStatisticsTypeComputer.java b/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/typecomputer/impl/LocalSingleVarStatisticsTypeComputer.java
new file mode 100644
index 0000000..7650687f
--- /dev/null
+++ b/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/typecomputer/impl/LocalSingleVarStatisticsTypeComputer.java
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.om.typecomputer.impl;
+
+import org.apache.asterix.om.typecomputer.base.IResultTypeComputer;
+import org.apache.asterix.om.types.ARecordType;
+import org.apache.asterix.om.types.AUnionType;
+import org.apache.asterix.om.types.BuiltinType;
+import org.apache.asterix.om.types.IAType;
+import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
+import org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import org.apache.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
+import org.apache.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
+
+public class LocalSingleVarStatisticsTypeComputer implements IResultTypeComputer {
+
+    public static final LocalSingleVarStatisticsTypeComputer INSTANCE = new LocalSingleVarStatisticsTypeComputer();
+
+    @Override
+    public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
+            IMetadataProvider<?, ?> metadataProvider) throws AlgebricksException {
+        return new ARecordType(null, new String[] { "m1", "m2", "count" },
+                new IAType[] { AUnionType.createNullableType(BuiltinType.ADOUBLE, "OptionalDouble"),
+                        AUnionType.createNullableType(BuiltinType.ADOUBLE, "OptionalDouble"), BuiltinType.AINT64 },
+                false);
+    }
+}
diff --git a/asterixdb/asterix-om/src/test/java/org/apache/asterix/om/typecomputer/TypeComputerTest.java b/asterixdb/asterix-om/src/test/java/org/apache/asterix/om/typecomputer/TypeComputerTest.java
index 9f6a8eb..d18472c 100644
--- a/asterixdb/asterix-om/src/test/java/org/apache/asterix/om/typecomputer/TypeComputerTest.java
+++ b/asterixdb/asterix-om/src/test/java/org/apache/asterix/om/typecomputer/TypeComputerTest.java
@@ -96,6 +96,7 @@
         exceptionalTypeComputers.add("NullableDoubleTypeComputer");
         exceptionalTypeComputers.add("RecordMergeTypeComputer");
         exceptionalTypeComputers.add("BooleanOrMissingTypeComputer");
+        exceptionalTypeComputers.add("LocalSingleVarStatisticsTypeComputer");
 
         // Tests all usual type computers.
         Reflections reflections = new Reflections("org.apache.asterix.om.typecomputer", new SubTypesScanner(false));
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/scalar/ScalarSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/scalar/ScalarSqlStddevAggregateDescriptor.java
new file mode 100644
index 0000000..0b80fe4
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/scalar/ScalarSqlStddevAggregateDescriptor.java
@@ -0,0 +1,49 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.asterix.runtime.aggregates.scalar;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.std.SqlStddevAggregateDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class ScalarSqlStddevAggregateDescriptor extends AbstractScalarAggregateDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    public final static FunctionIdentifier FID = BuiltinFunctions.SCALAR_SQL_STDDEV;
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new ScalarSqlStddevAggregateDescriptor(
+                    SqlStddevAggregateDescriptor.FACTORY.createFunctionDescriptor());
+        }
+    };
+
+    private ScalarSqlStddevAggregateDescriptor(IFunctionDescriptor aggFuncDesc) {
+        super(aggFuncDesc);
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/scalar/ScalarStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/scalar/ScalarStddevAggregateDescriptor.java
new file mode 100644
index 0000000..00d26c9
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/scalar/ScalarStddevAggregateDescriptor.java
@@ -0,0 +1,48 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.asterix.runtime.aggregates.scalar;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.std.StddevAggregateDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class ScalarStddevAggregateDescriptor extends AbstractScalarAggregateDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    public final static FunctionIdentifier FID = BuiltinFunctions.SCALAR_STDDEV;
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new ScalarStddevAggregateDescriptor(StddevAggregateDescriptor.FACTORY.createFunctionDescriptor());
+        }
+    };
+
+    private ScalarStddevAggregateDescriptor(IFunctionDescriptor aggFuncDesc) {
+        super(aggFuncDesc);
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableAvgAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableAvgAggregateFunction.java
index 563ff00..1270cdc 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableAvgAggregateFunction.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableAvgAggregateFunction.java
@@ -137,7 +137,13 @@
         } else if (aggType == ATypeTag.SYSTEM_NULL) {
             aggType = typeTag;
         } else if (typeTag != ATypeTag.SYSTEM_NULL && !ATypeHierarchy.isCompatible(typeTag, aggType)) {
-            throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.AVG, bytes[offset], aggType.serialize());
+            if (typeTag.ordinal() > aggType.ordinal()) {
+                throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.AVG, bytes[offset],
+                        aggType.serialize());
+            } else {
+                throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.AVG, aggType.serialize(),
+                        bytes[offset]);
+            }
         } else if (ATypeHierarchy.canPromote(aggType, typeTag)) {
             aggType = typeTag;
         }
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableSingleVariableStatisticsAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableSingleVariableStatisticsAggregateFunction.java
new file mode 100644
index 0000000..0b16b68
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableSingleVariableStatisticsAggregateFunction.java
@@ -0,0 +1,296 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.common.config.GlobalConfig;
+import org.apache.asterix.dataflow.data.nontagged.serde.*;
+import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
+import org.apache.asterix.om.base.*;
+import org.apache.asterix.om.types.*;
+import org.apache.asterix.om.types.hierachy.ATypeHierarchy;
+import org.apache.asterix.runtime.aggregates.utils.SingleVarFunctionsUtil;
+import org.apache.asterix.runtime.evaluators.common.AccessibleByteArrayEval;
+import org.apache.asterix.runtime.evaluators.common.ClosedRecordConstructorEvalFactory.ClosedRecordConstructorEval;
+import org.apache.asterix.runtime.exceptions.IncompatibleTypeException;
+import org.apache.asterix.runtime.exceptions.UnsupportedItemTypeException;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.data.std.primitive.VoidPointable;
+import org.apache.hyracks.data.std.util.ByteArrayAccessibleOutputStream;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+public abstract class AbstractSerializableSingleVariableStatisticsAggregateFunction
+        extends AbstractSerializableAggregateFunction {
+
+    /*
+    M1, M2, M3 and M4 are the 1st to 4th central moment of a data sample
+     */
+    private static final int M1_FIELD_ID = 0;
+    private static final int M2_FIELD_ID = 1;
+    private static final int COUNT_FIELD_ID = 2;
+
+    private static final int M1_OFFSET = 0;
+    private static final int M2_OFFSET = 8;
+    private static final int COUNT_OFFSET = 16;
+    protected static final int AGG_TYPE_OFFSET = 24;
+
+    private IPointable inputVal = new VoidPointable();
+    private IScalarEvaluator eval;
+    private AMutableDouble aDouble = new AMutableDouble(0);
+    private AMutableInt64 aInt64 = new AMutableInt64(0);
+    private SingleVarFunctionsUtil moments = new SingleVarFunctionsUtil();
+
+    private IPointable resultBytes = new VoidPointable();
+    private ByteArrayAccessibleOutputStream m1Bytes = new ByteArrayAccessibleOutputStream();
+    private DataOutput m1BytesOutput = new DataOutputStream(m1Bytes);
+    private ByteArrayAccessibleOutputStream m2Bytes = new ByteArrayAccessibleOutputStream();
+    private DataOutput m2BytesOutput = new DataOutputStream(m2Bytes);
+    private ByteArrayAccessibleOutputStream countBytes = new ByteArrayAccessibleOutputStream();
+    private DataOutput countBytesOutput = new DataOutputStream(countBytes);
+    private IScalarEvaluator evalM1 = new AccessibleByteArrayEval(m1Bytes);
+    private IScalarEvaluator evalM2 = new AccessibleByteArrayEval(m2Bytes);
+    private IScalarEvaluator evalCount = new AccessibleByteArrayEval(countBytes);
+    private ClosedRecordConstructorEval recordEval;
+
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<ADouble> doubleSerde =
+            SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ADOUBLE);
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<AInt64> longSerde =
+            SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT64);
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<ANull> nullSerde =
+            SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ANULL);
+
+    public AbstractSerializableSingleVariableStatisticsAggregateFunction(IScalarEvaluatorFactory[] args,
+            IHyracksTaskContext context, SourceLocation sourceLoc) throws HyracksDataException {
+        super(sourceLoc);
+        eval = args[0].createScalarEvaluator(context);
+    }
+
+    @Override
+    public void init(DataOutput state) throws HyracksDataException {
+        try {
+            state.writeDouble(0.0);
+            state.writeDouble(0.0);
+            state.writeLong(0L);
+            state.writeByte(ATypeTag.SERIALIZED_SYSTEM_NULL_TYPE_TAG);
+            moments.set(0, 0, 0);
+        } catch (IOException e) {
+            throw HyracksDataException.create(e);
+        }
+    }
+
+    @Override
+    public abstract void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws HyracksDataException;
+
+    @Override
+    public abstract void finish(byte[] state, int start, int len, DataOutput result) throws HyracksDataException;
+
+    @Override
+    public abstract void finishPartial(byte[] state, int start, int len, DataOutput result) throws HyracksDataException;
+
+    protected abstract void processNull(byte[] state, int start);
+
+    protected abstract FunctionIdentifier getFunctionIdentifier();
+
+    protected void processDataValues(IFrameTupleReference tuple, byte[] state, int start, int len)
+            throws HyracksDataException {
+        if (skipStep(state, start)) {
+            return;
+        }
+        eval.evaluate(tuple, inputVal);
+        byte[] bytes = inputVal.getByteArray();
+        int offset = inputVal.getStartOffset();
+
+        double m1 = BufferSerDeUtil.getDouble(state, start + M1_OFFSET);
+        double m2 = BufferSerDeUtil.getDouble(state, start + M2_OFFSET);
+        long count = BufferSerDeUtil.getLong(state, start + COUNT_OFFSET);
+        moments.set(m1, m2, count);
+
+        ATypeTag typeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(bytes[offset]);
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start + AGG_TYPE_OFFSET]);
+        if (typeTag == ATypeTag.MISSING || typeTag == ATypeTag.NULL) {
+            processNull(state, start);
+            return;
+        } else if (aggType == ATypeTag.SYSTEM_NULL) {
+            aggType = typeTag;
+        } else if (typeTag != ATypeTag.SYSTEM_NULL && !ATypeHierarchy.isCompatible(typeTag, aggType)) {
+            if (typeTag.ordinal() > aggType.ordinal()) {
+                throw new IncompatibleTypeException(sourceLoc, getFunctionIdentifier(), bytes[offset],
+                        aggType.serialize());
+            } else {
+                throw new IncompatibleTypeException(sourceLoc, getFunctionIdentifier(), aggType.serialize(),
+                        bytes[offset]);
+            }
+        } else if (ATypeHierarchy.canPromote(aggType, typeTag)) {
+            aggType = typeTag;
+        }
+        double val;
+        switch (typeTag) {
+            case TINYINT:
+                val = AInt8SerializerDeserializer.getByte(bytes, offset + 1);
+                moments.push(val);
+                break;
+            case SMALLINT:
+                val = AInt16SerializerDeserializer.getShort(bytes, offset + 1);
+                moments.push(val);
+                break;
+            case INTEGER:
+                val = AInt32SerializerDeserializer.getInt(bytes, offset + 1);
+                moments.push(val);
+                break;
+            case BIGINT:
+                val = AInt64SerializerDeserializer.getLong(bytes, offset + 1);
+                moments.push(val);
+                break;
+            case FLOAT:
+                val = AFloatSerializerDeserializer.getFloat(bytes, offset + 1);
+                moments.push(val);
+                break;
+            case DOUBLE:
+                val = ADoubleSerializerDeserializer.getDouble(bytes, offset + 1);
+                moments.push(val);
+                break;
+            default:
+                throw new UnsupportedItemTypeException(sourceLoc, getFunctionIdentifier(), bytes[offset]);
+        }
+        BufferSerDeUtil.writeDouble(moments.getM1(), state, start + M1_OFFSET);
+        BufferSerDeUtil.writeDouble(moments.getM2(), state, start + M2_OFFSET);
+        BufferSerDeUtil.writeLong(moments.getCount(), state, start + COUNT_OFFSET);
+        state[start + AGG_TYPE_OFFSET] = aggType.serialize();
+    }
+
+    protected void finishPartialResults(byte[] state, int start, int len, DataOutput result)
+            throws HyracksDataException {
+        double m1 = BufferSerDeUtil.getDouble(state, start + M1_OFFSET);
+        double m2 = BufferSerDeUtil.getDouble(state, start + M2_OFFSET);
+        long count = BufferSerDeUtil.getLong(state, start + COUNT_OFFSET);
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start + AGG_TYPE_OFFSET]);
+        if (recordEval == null) {
+            ARecordType recType = new ARecordType(null, new String[] { "m1", "m2", "count" },
+                    new IAType[] { BuiltinType.ADOUBLE, BuiltinType.ADOUBLE, BuiltinType.AINT64 }, false);
+            recordEval = new ClosedRecordConstructorEval(recType, new IScalarEvaluator[] { evalM1, evalM2, evalCount });
+        }
+
+        try {
+            if (aggType == ATypeTag.SYSTEM_NULL) {
+                if (GlobalConfig.DEBUG) {
+                    GlobalConfig.ASTERIX_LOGGER.trace("Single Var statistics aggregate ran over empty input.");
+                }
+                result.writeByte(ATypeTag.SERIALIZED_SYSTEM_NULL_TYPE_TAG);
+            } else if (aggType == ATypeTag.NULL) {
+                result.writeByte(ATypeTag.SERIALIZED_NULL_TYPE_TAG);
+            } else {
+                m1Bytes.reset();
+                aDouble.setValue(m1);
+                doubleSerde.serialize(aDouble, m1BytesOutput);
+                m2Bytes.reset();
+                aDouble.setValue(m2);
+                doubleSerde.serialize(aDouble, m2BytesOutput);
+                countBytes.reset();
+                aInt64.setValue(count);
+                longSerde.serialize(aInt64, countBytesOutput);
+                recordEval.evaluate(null, resultBytes);
+                result.write(resultBytes.getByteArray(), resultBytes.getStartOffset(), resultBytes.getLength());
+            }
+        } catch (IOException e) {
+            throw HyracksDataException.create(e);
+        }
+    }
+
+    protected void processPartialResults(IFrameTupleReference tuple, byte[] state, int start, int len)
+            throws HyracksDataException {
+        if (skipStep(state, start)) {
+            return;
+        }
+        double m1 = BufferSerDeUtil.getDouble(state, start + M1_OFFSET);
+        double m2 = BufferSerDeUtil.getDouble(state, start + M2_OFFSET);
+        long count = BufferSerDeUtil.getLong(state, start + COUNT_OFFSET);
+        moments.set(m1, m2, count);
+
+        eval.evaluate(tuple, inputVal);
+        byte[] serBytes = inputVal.getByteArray();
+        int offset = inputVal.getStartOffset();
+
+        ATypeTag typeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serBytes[offset]);
+        switch (typeTag) {
+            case NULL:
+                processNull(state, start);
+                break;
+            case SYSTEM_NULL:
+                // Ignore and return.
+                break;
+            case OBJECT:
+                // Expected.
+                ATypeTag aggType = ATypeTag.DOUBLE;
+                int nullBitmapSize = 0;
+                int offset1 = ARecordSerializerDeserializer.getFieldOffsetById(serBytes, offset, M1_FIELD_ID,
+                        nullBitmapSize, false);
+                int offset2 = ARecordSerializerDeserializer.getFieldOffsetById(serBytes, offset, M2_FIELD_ID,
+                        nullBitmapSize, false);
+                int offset3 = ARecordSerializerDeserializer.getFieldOffsetById(serBytes, offset, COUNT_FIELD_ID,
+                        nullBitmapSize, false);
+                double temp_m1 = ADoubleSerializerDeserializer.getDouble(serBytes, offset1);
+                double temp_m2 = ADoubleSerializerDeserializer.getDouble(serBytes, offset2);
+                long temp_count = AInt64SerializerDeserializer.getLong(serBytes, offset3);
+                moments.combine(temp_m1, temp_m2, temp_count);
+
+                BufferSerDeUtil.writeDouble(moments.getM1(), state, start + M1_OFFSET);
+                BufferSerDeUtil.writeDouble(moments.getM2(), state, start + M2_OFFSET);
+                BufferSerDeUtil.writeLong(moments.getCount(), state, start + COUNT_OFFSET);
+                state[start + AGG_TYPE_OFFSET] = aggType.serialize();
+                break;
+            default:
+                throw new UnsupportedItemTypeException(sourceLoc, getFunctionIdentifier(), serBytes[offset]);
+        }
+    }
+
+    protected void finishStddevFinalResults(byte[] state, int start, int len, DataOutput result)
+            throws HyracksDataException {
+        double m2 = BufferSerDeUtil.getDouble(state, start + M2_OFFSET);
+        long count = BufferSerDeUtil.getLong(state, start + COUNT_OFFSET);
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start + AGG_TYPE_OFFSET]);
+        try {
+            if (count <= 1 || aggType == ATypeTag.NULL) {
+                nullSerde.serialize(ANull.NULL, result);
+            } else {
+                aDouble.setValue(Math.sqrt(m2 / (count - 1)));
+                doubleSerde.serialize(aDouble, result);
+            }
+        } catch (IOException e) {
+            throw HyracksDataException.create(e);
+        }
+    }
+
+    protected boolean skipStep(byte[] state, int start) {
+        return false;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableSumAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableSumAggregateFunction.java
index a4e1090..132fd54 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableSumAggregateFunction.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/AbstractSerializableSumAggregateFunction.java
@@ -101,7 +101,13 @@
         } else if (aggType == ATypeTag.SYSTEM_NULL) {
             aggType = typeTag;
         } else if (typeTag != ATypeTag.SYSTEM_NULL && !ATypeHierarchy.isCompatible(typeTag, aggType)) {
-            throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.SUM, bytes[offset], aggType.serialize());
+            if (typeTag.ordinal() > aggType.ordinal()) {
+                throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.SUM, bytes[offset],
+                        aggType.serialize());
+            } else {
+                throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.SUM, aggType.serialize(),
+                        bytes[offset]);
+            }
         }
 
         if (ATypeHierarchy.canPromote(aggType, typeTag)) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevAggregateDescriptor.java
new file mode 100644
index 0000000..d06c6aa
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevAggregateDescriptor.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class SerializableGlobalSqlStddevAggregateDescriptor
+        extends AbstractSerializableAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SerializableGlobalSqlStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.SERIAL_GLOBAL_SQL_STDDEV;
+    }
+
+    @Override
+    public ISerializedAggregateEvaluatorFactory createSerializableAggregateEvaluatorFactory(
+            final IScalarEvaluatorFactory[] args) {
+        return new ISerializedAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ISerializedAggregateEvaluator createAggregateEvaluator(IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new SerializableGlobalSqlStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevAggregateFunction.java
new file mode 100644
index 0000000..1be87f6
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevAggregateFunction.java
@@ -0,0 +1,64 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+import java.io.DataOutput;
+
+public class SerializableGlobalSqlStddevAggregateFunction
+        extends AbstractSerializableSingleVariableStatisticsAggregateFunction {
+
+    public SerializableGlobalSqlStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws HyracksDataException {
+        processPartialResults(tuple, state, start, len);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishStddevFinalResults(state, start, len, result);
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishPartialResults(state, start, len, result);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevAggregateDescriptor.java
new file mode 100644
index 0000000..f17ef2f
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevAggregateDescriptor.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class SerializableGlobalStddevAggregateDescriptor
+        extends AbstractSerializableAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SerializableGlobalStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.SERIAL_GLOBAL_STDDEV;
+    }
+
+    @Override
+    public ISerializedAggregateEvaluatorFactory createSerializableAggregateEvaluatorFactory(
+            final IScalarEvaluatorFactory[] args) {
+        return new ISerializedAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ISerializedAggregateEvaluator createAggregateEvaluator(IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new SerializableGlobalStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevAggregateFunction.java
new file mode 100644
index 0000000..b15cffd
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevAggregateFunction.java
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.types.ATypeTag;
+import org.apache.asterix.om.types.EnumDeserializer;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+import java.io.DataOutput;
+
+public class SerializableGlobalStddevAggregateFunction
+        extends AbstractSerializableSingleVariableStatisticsAggregateFunction {
+
+    public SerializableGlobalStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws HyracksDataException {
+        processPartialResults(tuple, state, start, len);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishStddevFinalResults(state, start, len, result);
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishPartialResults(state, start, len, result);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+        state[start + AGG_TYPE_OFFSET] = ATypeTag.SERIALIZED_NULL_TYPE_TAG;
+    }
+
+    @Override
+    protected boolean skipStep(byte[] state, int start) {
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start + AGG_TYPE_OFFSET]);
+        return aggType == ATypeTag.NULL;
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevAggregateDescriptor.java
new file mode 100644
index 0000000..e5d788a
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevAggregateDescriptor.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class SerializableIntermediateSqlStddevAggregateDescriptor
+        extends AbstractSerializableAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SerializableIntermediateSqlStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.SERIAL_INTERMEDIATE_SQL_STDDEV;
+    }
+
+    @Override
+    public ISerializedAggregateEvaluatorFactory createSerializableAggregateEvaluatorFactory(
+            final IScalarEvaluatorFactory[] args) {
+        return new ISerializedAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ISerializedAggregateEvaluator createAggregateEvaluator(IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new SerializableIntermediateSqlStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevAggregateFunction.java
new file mode 100644
index 0000000..498801b
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevAggregateFunction.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+import java.io.DataOutput;
+
+public class SerializableIntermediateSqlStddevAggregateFunction
+        extends AbstractSerializableSingleVariableStatisticsAggregateFunction {
+
+    public SerializableIntermediateSqlStddevAggregateFunction(IScalarEvaluatorFactory[] args,
+            IHyracksTaskContext context, SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws HyracksDataException {
+        processPartialResults(tuple, state, start, len);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishPartialResults(state, start, len, result);
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishPartialResults(state, start, len, result);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevAggregateDescriptor.java
new file mode 100644
index 0000000..d17e5b7
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevAggregateDescriptor.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class SerializableIntermediateStddevAggregateDescriptor
+        extends AbstractSerializableAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SerializableIntermediateStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.SERIAL_INTERMEDIATE_STDDEV;
+    }
+
+    @Override
+    public ISerializedAggregateEvaluatorFactory createSerializableAggregateEvaluatorFactory(
+            final IScalarEvaluatorFactory[] args) {
+        return new ISerializedAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ISerializedAggregateEvaluator createAggregateEvaluator(IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new SerializableIntermediateStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevAggregateFunction.java
new file mode 100644
index 0000000..8bc8e14
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevAggregateFunction.java
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.types.ATypeTag;
+import org.apache.asterix.om.types.EnumDeserializer;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+import java.io.DataOutput;
+
+public class SerializableIntermediateStddevAggregateFunction
+        extends AbstractSerializableSingleVariableStatisticsAggregateFunction {
+
+    public SerializableIntermediateStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws HyracksDataException {
+        processPartialResults(tuple, state, start, len);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishPartialResults(state, start, len, result);
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishPartialResults(state, start, len, result);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+        state[start + AGG_TYPE_OFFSET] = ATypeTag.SERIALIZED_NULL_TYPE_TAG;
+    }
+
+    @Override
+    protected boolean skipStep(byte[] state, int start) {
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start + AGG_TYPE_OFFSET]);
+        return aggType == ATypeTag.NULL;
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevAggregateDescriptor.java
new file mode 100644
index 0000000..9fd7381
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevAggregateDescriptor.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class SerializableLocalSqlStddevAggregateDescriptor
+        extends AbstractSerializableAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SerializableLocalSqlStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.SERIAL_LOCAL_SQL_STDDEV;
+    }
+
+    @Override
+    public ISerializedAggregateEvaluatorFactory createSerializableAggregateEvaluatorFactory(
+            final IScalarEvaluatorFactory[] args) {
+        return new ISerializedAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ISerializedAggregateEvaluator createAggregateEvaluator(IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new SerializableLocalSqlStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevAggregateFunction.java
new file mode 100644
index 0000000..d0ef10e
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevAggregateFunction.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+import java.io.DataOutput;
+
+public class SerializableLocalSqlStddevAggregateFunction
+        extends AbstractSerializableSingleVariableStatisticsAggregateFunction {
+
+    public SerializableLocalSqlStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws HyracksDataException {
+        processDataValues(tuple, state, start, len);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishPartialResults(state, start, len, result);
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finish(state, start, len, result);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevAggregateDescriptor.java
new file mode 100644
index 0000000..f4d3bd8
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevAggregateDescriptor.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class SerializableLocalStddevAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SerializableLocalStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.SERIAL_LOCAL_STDDEV;
+    }
+
+    @Override
+    public ISerializedAggregateEvaluatorFactory createSerializableAggregateEvaluatorFactory(
+            final IScalarEvaluatorFactory[] args) {
+        return new ISerializedAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ISerializedAggregateEvaluator createAggregateEvaluator(IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new SerializableLocalStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevAggregateFunction.java
new file mode 100644
index 0000000..3693d4b
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevAggregateFunction.java
@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.types.ATypeTag;
+import org.apache.asterix.om.types.EnumDeserializer;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+import java.io.DataOutput;
+
+public class SerializableLocalStddevAggregateFunction
+        extends AbstractSerializableSingleVariableStatisticsAggregateFunction {
+
+    public SerializableLocalStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws HyracksDataException {
+        processDataValues(tuple, state, start, len);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishPartialResults(state, start, len, result);
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finish(state, start, len, result);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+        state[start + AGG_TYPE_OFFSET] = ATypeTag.SERIALIZED_NULL_TYPE_TAG;
+    }
+
+    @Override
+    protected boolean skipStep(byte[] state, int start) {
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start + AGG_TYPE_OFFSET]);
+        return aggType == ATypeTag.NULL;
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevAggregateDescriptor.java
new file mode 100644
index 0000000..a2c2a16
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevAggregateDescriptor.java
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class SerializableSqlStddevAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SerializableSqlStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.SERIAL_SQL_STDDEV;
+    }
+
+    @Override
+    public ISerializedAggregateEvaluatorFactory createSerializableAggregateEvaluatorFactory(
+            final IScalarEvaluatorFactory[] args) {
+        return new ISerializedAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ISerializedAggregateEvaluator createAggregateEvaluator(IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new SerializableSqlStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevAggregateFunction.java
new file mode 100644
index 0000000..005eaad
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevAggregateFunction.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+import java.io.DataOutput;
+
+public class SerializableSqlStddevAggregateFunction
+        extends AbstractSerializableSingleVariableStatisticsAggregateFunction {
+
+    public SerializableSqlStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws HyracksDataException {
+        processDataValues(tuple, state, start, len);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishStddevFinalResults(state, start, len, result);
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finish(state, start, len, result);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevAggregateDescriptor.java
new file mode 100644
index 0000000..f20abc7
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevAggregateDescriptor.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.ISerializedAggregateEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class SerializableStddevAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SerializableStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.SERIAL_STDDEV;
+    }
+
+    @Override
+    public ISerializedAggregateEvaluatorFactory createSerializableAggregateEvaluatorFactory(
+            final IScalarEvaluatorFactory[] args) throws AlgebricksException {
+        return new ISerializedAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ISerializedAggregateEvaluator createAggregateEvaluator(IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new SerializableStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevAggregateFunction.java
new file mode 100644
index 0000000..f30848d
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevAggregateFunction.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.asterix.runtime.aggregates.serializable.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.types.ATypeTag;
+import org.apache.asterix.om.types.EnumDeserializer;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+import java.io.DataOutput;
+
+public class SerializableStddevAggregateFunction extends AbstractSerializableSingleVariableStatisticsAggregateFunction {
+
+    public SerializableStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws HyracksDataException {
+        processDataValues(tuple, state, start, len);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finishStddevFinalResults(state, start, len, result);
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput result) throws HyracksDataException {
+        finish(state, start, len, result);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+        state[start + AGG_TYPE_OFFSET] = ATypeTag.SERIALIZED_NULL_TYPE_TAG;
+    }
+
+    @Override
+    protected boolean skipStep(byte[] state, int start) {
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start + AGG_TYPE_OFFSET]);
+        return aggType == ATypeTag.NULL;
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractAvgAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractAvgAggregateFunction.java
index 1dde27b..164fa6f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractAvgAggregateFunction.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractAvgAggregateFunction.java
@@ -135,7 +135,11 @@
         } else if (aggType == ATypeTag.SYSTEM_NULL) {
             aggType = typeTag;
         } else if (typeTag != ATypeTag.SYSTEM_NULL && !ATypeHierarchy.isCompatible(typeTag, aggType)) {
-            throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.AVG, data[offset], aggType.serialize());
+            if (typeTag.ordinal() > aggType.ordinal()) {
+                throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.AVG, data[offset], aggType.serialize());
+            } else {
+                throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.AVG, aggType.serialize(), data[offset]);
+            }
         } else if (ATypeHierarchy.canPromote(aggType, typeTag)) {
             aggType = typeTag;
         }
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractMinMaxAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractMinMaxAggregateFunction.java
index 1aa609f..59e0ccc 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractMinMaxAggregateFunction.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractMinMaxAggregateFunction.java
@@ -88,7 +88,11 @@
             // Initialize min value.
             outputVal.assign(inputVal);
         } else if (typeTag != ATypeTag.SYSTEM_NULL && !ATypeHierarchy.isCompatible(typeTag, aggType)) {
-            throw new IncompatibleTypeException(sourceLoc, "min/max", typeTag.serialize(), aggType.serialize());
+            if (typeTag.ordinal() > aggType.ordinal()) {
+                throw new IncompatibleTypeException(sourceLoc, "min/max", typeTag.serialize(), aggType.serialize());
+            } else {
+                throw new IncompatibleTypeException(sourceLoc, "min/max", aggType.serialize(), typeTag.serialize());
+            }
         } else {
 
             // If a system_null is encountered locally, it would be an error; otherwise if it is seen
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractSingleVarStatisticsAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractSingleVarStatisticsAggregateFunction.java
new file mode 100644
index 0000000..8141839
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractSingleVarStatisticsAggregateFunction.java
@@ -0,0 +1,260 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.common.config.GlobalConfig;
+import org.apache.asterix.dataflow.data.nontagged.serde.*;
+import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
+import org.apache.asterix.om.base.*;
+import org.apache.asterix.om.types.*;
+import org.apache.asterix.om.types.hierachy.ATypeHierarchy;
+import org.apache.asterix.runtime.aggregates.utils.SingleVarFunctionsUtil;
+import org.apache.asterix.runtime.evaluators.common.AccessibleByteArrayEval;
+import org.apache.asterix.runtime.evaluators.common.ClosedRecordConstructorEvalFactory.ClosedRecordConstructorEval;
+import org.apache.asterix.runtime.exceptions.IncompatibleTypeException;
+import org.apache.asterix.runtime.exceptions.UnsupportedItemTypeException;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.data.std.primitive.VoidPointable;
+import org.apache.hyracks.data.std.util.ArrayBackedValueStorage;
+import org.apache.hyracks.data.std.util.ByteArrayAccessibleOutputStream;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+public abstract class AbstractSingleVarStatisticsAggregateFunction extends AbstractAggregateFunction {
+
+    /*
+    M1 and M2 are the 1st and 2nd central moment of a data sample
+     */
+    private static final int M1_FIELD_ID = 0;
+    private static final int M2_FIELD_ID = 1;
+    private static final int COUNT_FIELD_ID = 2;
+
+    private final ARecordType recType;
+
+    private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
+    private IPointable inputVal = new VoidPointable();
+    private IScalarEvaluator eval;
+    protected ATypeTag aggType;
+    private SingleVarFunctionsUtil moments = new SingleVarFunctionsUtil();
+    private AMutableDouble aDouble = new AMutableDouble(0);
+    private AMutableInt64 aInt64 = new AMutableInt64(0);
+
+    private IPointable resultBytes = new VoidPointable();
+    private ByteArrayAccessibleOutputStream m1Bytes = new ByteArrayAccessibleOutputStream();
+    private DataOutput m1BytesOutput = new DataOutputStream(m1Bytes);
+    private ByteArrayAccessibleOutputStream m2Bytes = new ByteArrayAccessibleOutputStream();
+    private DataOutput m2BytesOutput = new DataOutputStream(m2Bytes);
+    private ByteArrayAccessibleOutputStream countBytes = new ByteArrayAccessibleOutputStream();
+    private DataOutput countBytesOutput = new DataOutputStream(countBytes);
+    private IScalarEvaluator evalM1 = new AccessibleByteArrayEval(m1Bytes);
+    private IScalarEvaluator evalM2 = new AccessibleByteArrayEval(m2Bytes);
+    private IScalarEvaluator evalCount = new AccessibleByteArrayEval(countBytes);
+    private ClosedRecordConstructorEval recordEval;
+
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<ADouble> doubleSerde =
+            SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ADOUBLE);
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<AInt64> longSerde =
+            SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT64);
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<ANull> nullSerde =
+            SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ANULL);
+
+    public AbstractSingleVarStatisticsAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(sourceLoc);
+        eval = args[0].createScalarEvaluator(context);
+        recType = new ARecordType(null, new String[] { "m1", "m2", "count" },
+                new IAType[] { BuiltinType.ADOUBLE, BuiltinType.ADOUBLE, BuiltinType.AINT64 }, false);
+        recordEval = new ClosedRecordConstructorEval(recType, new IScalarEvaluator[] { evalM1, evalM2, evalCount });
+    }
+
+    @Override
+    public void init() throws HyracksDataException {
+        aggType = ATypeTag.SYSTEM_NULL;
+        moments.set(0, 0, 0);
+    }
+
+    @Override
+    public abstract void step(IFrameTupleReference tuple) throws HyracksDataException;
+
+    @Override
+    public abstract void finish(IPointable result) throws HyracksDataException;
+
+    @Override
+    public abstract void finishPartial(IPointable result) throws HyracksDataException;
+
+    protected abstract FunctionIdentifier getFunctionIdentifier();
+
+    protected abstract void processNull();
+
+    protected void processDataValues(IFrameTupleReference tuple) throws HyracksDataException {
+        if (skipStep()) {
+            return;
+        }
+        eval.evaluate(tuple, inputVal);
+        byte[] data = inputVal.getByteArray();
+        int offset = inputVal.getStartOffset();
+
+        ATypeTag typeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(data[offset]);
+        if (typeTag == ATypeTag.MISSING || typeTag == ATypeTag.NULL) {
+            processNull();
+            return;
+        } else if (aggType == ATypeTag.SYSTEM_NULL) {
+            aggType = typeTag;
+        } else if (typeTag != ATypeTag.SYSTEM_NULL && !ATypeHierarchy.isCompatible(typeTag, aggType)) {
+            if (typeTag.ordinal() > aggType.ordinal()) {
+                throw new IncompatibleTypeException(sourceLoc, getFunctionIdentifier(), data[offset],
+                        aggType.serialize());
+            } else {
+                throw new IncompatibleTypeException(sourceLoc, getFunctionIdentifier(), aggType.serialize(),
+                        data[offset]);
+            }
+        } else if (ATypeHierarchy.canPromote(aggType, typeTag)) {
+            aggType = typeTag;
+        }
+        double val;
+        switch (typeTag) {
+            case TINYINT:
+                val = AInt8SerializerDeserializer.getByte(data, offset + 1);
+                moments.push(val);
+                break;
+            case SMALLINT:
+                val = AInt16SerializerDeserializer.getShort(data, offset + 1);
+                moments.push(val);
+                break;
+            case INTEGER:
+                val = AInt32SerializerDeserializer.getInt(data, offset + 1);
+                moments.push(val);
+                break;
+            case BIGINT:
+                val = AInt64SerializerDeserializer.getLong(data, offset + 1);
+                moments.push(val);
+                break;
+            case FLOAT:
+                val = AFloatSerializerDeserializer.getFloat(data, offset + 1);
+                moments.push(val);
+                break;
+            case DOUBLE:
+                val = ADoubleSerializerDeserializer.getDouble(data, offset + 1);
+                moments.push(val);
+                break;
+            default:
+                throw new UnsupportedItemTypeException(sourceLoc, getFunctionIdentifier(), data[offset]);
+        }
+    }
+
+    protected void finishPartialResults(IPointable result) throws HyracksDataException {
+        resultStorage.reset();
+        try {
+            // Double check that count 0 is accounted
+            if (aggType == ATypeTag.SYSTEM_NULL) {
+                if (GlobalConfig.DEBUG) {
+                    GlobalConfig.ASTERIX_LOGGER.trace("Single var statistics aggregate ran over empty input.");
+                }
+                resultStorage.getDataOutput().writeByte(ATypeTag.SERIALIZED_SYSTEM_NULL_TYPE_TAG);
+                result.set(resultStorage);
+            } else if (aggType == ATypeTag.NULL) {
+                resultStorage.getDataOutput().writeByte(ATypeTag.SERIALIZED_NULL_TYPE_TAG);
+                result.set(resultStorage);
+            } else {
+                m1Bytes.reset();
+                aDouble.setValue(moments.getM1());
+                doubleSerde.serialize(aDouble, m1BytesOutput);
+                m2Bytes.reset();
+                aDouble.setValue(moments.getM2());
+                doubleSerde.serialize(aDouble, m2BytesOutput);
+                countBytes.reset();
+                aInt64.setValue(moments.getCount());
+                longSerde.serialize(aInt64, countBytesOutput);
+                recordEval.evaluate(null, resultBytes);
+                result.set(resultBytes);
+            }
+        } catch (IOException e) {
+            throw HyracksDataException.create(e);
+        }
+    }
+
+    protected void processPartialResults(IFrameTupleReference tuple) throws HyracksDataException {
+        if (skipStep()) {
+            return;
+        }
+        eval.evaluate(tuple, inputVal);
+        byte[] serBytes = inputVal.getByteArray();
+        int offset = inputVal.getStartOffset();
+        ATypeTag typeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serBytes[offset]);
+        switch (typeTag) {
+            case NULL:
+                processNull();
+                break;
+            case SYSTEM_NULL:
+                // Ignore and return.
+                break;
+            case OBJECT:
+                // Expected.
+                aggType = ATypeTag.DOUBLE;
+                int nullBitmapSize = 0;
+                int offset1 = ARecordSerializerDeserializer.getFieldOffsetById(serBytes, offset, M1_FIELD_ID,
+                        nullBitmapSize, false);
+                int offset2 = ARecordSerializerDeserializer.getFieldOffsetById(serBytes, offset, M2_FIELD_ID,
+                        nullBitmapSize, false);
+                int offset3 = ARecordSerializerDeserializer.getFieldOffsetById(serBytes, offset, COUNT_FIELD_ID,
+                        nullBitmapSize, false);
+                double temp_m1 = ADoubleSerializerDeserializer.getDouble(serBytes, offset1);
+                double temp_m2 = ADoubleSerializerDeserializer.getDouble(serBytes, offset2);
+                long temp_count = AInt64SerializerDeserializer.getLong(serBytes, offset3);
+                moments.combine(temp_m1, temp_m2, temp_count);
+                break;
+            default:
+                throw new UnsupportedItemTypeException(sourceLoc, "intermediate/global-single-var-statistics",
+                        serBytes[offset]);
+        }
+    }
+
+    protected void finishStddevFinalResults(IPointable result) throws HyracksDataException {
+        resultStorage.reset();
+        try {
+            if (moments.getCount() <= 1 || aggType == ATypeTag.NULL) {
+                nullSerde.serialize(ANull.NULL, resultStorage.getDataOutput());
+            } else {
+                aDouble.setValue(Math.sqrt(moments.getM2() / (moments.getCount() - 1)));
+                doubleSerde.serialize(aDouble, resultStorage.getDataOutput());
+            }
+        } catch (IOException e) {
+            throw HyracksDataException.create(e);
+        }
+        result.set(resultStorage);
+    }
+
+    protected boolean skipStep() {
+        return false;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractSumAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractSumAggregateFunction.java
index a8fa552..037e307 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractSumAggregateFunction.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AbstractSumAggregateFunction.java
@@ -95,8 +95,13 @@
         } else if (aggType == ATypeTag.SYSTEM_NULL) {
             aggType = typeTag;
         } else if (typeTag != ATypeTag.SYSTEM_NULL && !ATypeHierarchy.isCompatible(typeTag, aggType)) {
-            throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.SUM, typeTag.serialize(),
-                    aggType.serialize());
+            if (typeTag.ordinal() > aggType.ordinal()) {
+                throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.SUM, typeTag.serialize(),
+                        aggType.serialize());
+            } else {
+                throw new IncompatibleTypeException(sourceLoc, BuiltinFunctions.SUM, aggType.serialize(),
+                        typeTag.serialize());
+            }
         }
 
         if (ATypeHierarchy.canPromote(aggType, typeTag)) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevAggregateDescriptor.java
new file mode 100644
index 0000000..19d90b2
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevAggregateDescriptor.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class GlobalSqlStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new GlobalSqlStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.GLOBAL_SQL_STDDEV;
+    }
+
+    @Override
+    public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
+        return new IAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IAggregateEvaluator createAggregateEvaluator(final IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new GlobalSqlStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevAggregateFunction.java
new file mode 100644
index 0000000..3728201
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevAggregateFunction.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class GlobalSqlStddevAggregateFunction extends AbstractSingleVarStatisticsAggregateFunction {
+
+    public GlobalSqlStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple) throws HyracksDataException {
+        processPartialResults(tuple);
+    }
+
+    @Override
+    public void finish(IPointable result) throws HyracksDataException {
+        finishStddevFinalResults(result);
+    }
+
+    @Override
+    public void finishPartial(IPointable result) throws HyracksDataException {
+        finishPartialResults(result);
+    }
+
+    @Override
+    protected void processNull() {
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevAggregateDescriptor.java
new file mode 100644
index 0000000..3ab204c
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevAggregateDescriptor.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class GlobalStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new GlobalStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.GLOBAL_STDDEV;
+    }
+
+    @Override
+    public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
+        return new IAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IAggregateEvaluator createAggregateEvaluator(final IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new GlobalStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevAggregateFunction.java
new file mode 100644
index 0000000..5ceea4b
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevAggregateFunction.java
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.types.ATypeTag;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class GlobalStddevAggregateFunction extends AbstractSingleVarStatisticsAggregateFunction {
+
+    public GlobalStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple) throws HyracksDataException {
+        processPartialResults(tuple);
+    }
+
+    @Override
+    public void finish(IPointable result) throws HyracksDataException {
+        finishStddevFinalResults(result);
+    }
+
+    @Override
+    public void finishPartial(IPointable result) throws HyracksDataException {
+        finishPartialResults(result);
+    }
+
+    @Override
+    protected void processNull() {
+        aggType = ATypeTag.NULL;
+    }
+
+    @Override
+    protected boolean skipStep() {
+        return aggType == ATypeTag.NULL;
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevAggregateDescriptor.java
new file mode 100644
index 0000000..f96a757
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevAggregateDescriptor.java
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class IntermediateSqlStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntermediateSqlStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.INTERMEDIATE_SQL_STDDEV;
+    }
+
+    @Override
+    public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
+        return new IAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IAggregateEvaluator createAggregateEvaluator(final IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new IntermediateSqlStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevAggregateFunction.java
new file mode 100644
index 0000000..44a0315
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevAggregateFunction.java
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class IntermediateSqlStddevAggregateFunction extends AbstractSingleVarStatisticsAggregateFunction {
+
+    public IntermediateSqlStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple) throws HyracksDataException {
+        processPartialResults(tuple);
+    }
+
+    @Override
+    public void finish(IPointable result) throws HyracksDataException {
+        finishPartialResults(result);
+    }
+
+    @Override
+    public void finishPartial(IPointable result) throws HyracksDataException {
+        finishPartialResults(result);
+    }
+
+    @Override
+    protected void processNull() {
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevAggregateDescriptor.java
new file mode 100644
index 0000000..503072b
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevAggregateDescriptor.java
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class IntermediateStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntermediateStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.INTERMEDIATE_STDDEV;
+    }
+
+    @Override
+    public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
+        return new IAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IAggregateEvaluator createAggregateEvaluator(final IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new IntermediateStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevAggregateFunction.java
new file mode 100644
index 0000000..238a523
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevAggregateFunction.java
@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.types.ATypeTag;
+import org.apache.asterix.runtime.aggregates.serializable.std.AbstractSerializableSingleVariableStatisticsAggregateFunction;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class IntermediateStddevAggregateFunction extends AbstractSingleVarStatisticsAggregateFunction {
+
+    public IntermediateStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple) throws HyracksDataException {
+        processPartialResults(tuple);
+    }
+
+    @Override
+    public void finish(IPointable result) throws HyracksDataException {
+        finishPartialResults(result);
+    }
+
+    @Override
+    public void finishPartial(IPointable result) throws HyracksDataException {
+        finishPartialResults(result);
+    }
+
+    @Override
+    protected void processNull() {
+        aggType = ATypeTag.NULL;
+    }
+
+    @Override
+    protected boolean skipStep() {
+        return aggType == ATypeTag.NULL;
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevAggregateDescriptor.java
new file mode 100644
index 0000000..c89e71f
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevAggregateDescriptor.java
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class LocalSqlStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new LocalSqlStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.LOCAL_SQL_STDDEV;
+    }
+
+    @Override
+    public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
+        return new IAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IAggregateEvaluator createAggregateEvaluator(final IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new LocalSqlStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevAggregateFunction.java
new file mode 100644
index 0000000..b030b8e
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevAggregateFunction.java
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class LocalSqlStddevAggregateFunction extends AbstractSingleVarStatisticsAggregateFunction {
+
+    public LocalSqlStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple) throws HyracksDataException {
+        processDataValues(tuple);
+    }
+
+    @Override
+    public void finish(IPointable result) throws HyracksDataException {
+        finishPartialResults(result);
+    }
+
+    @Override
+    public void finishPartial(IPointable result) throws HyracksDataException {
+        finish(result);
+    }
+
+    @Override
+    protected void processNull() {
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevAggregateDescriptor.java
new file mode 100644
index 0000000..79bea48
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevAggregateDescriptor.java
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class LocalStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new LocalStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.LOCAL_STDDEV;
+    }
+
+    @Override
+    public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
+        return new IAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IAggregateEvaluator createAggregateEvaluator(final IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new LocalStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevAggregateFunction.java
new file mode 100644
index 0000000..7ebdb1f
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevAggregateFunction.java
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.types.ATypeTag;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class LocalStddevAggregateFunction extends AbstractSingleVarStatisticsAggregateFunction {
+
+    public LocalStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple) throws HyracksDataException {
+        processDataValues(tuple);
+    }
+
+    @Override
+    public void finish(IPointable result) throws HyracksDataException {
+        finishPartialResults(result);
+    }
+
+    @Override
+    public void finishPartial(IPointable result) throws HyracksDataException {
+        finish(result);
+    }
+
+    @Override
+    protected void processNull() {
+        aggType = ATypeTag.NULL;
+    }
+
+    @Override
+    protected boolean skipStep() {
+        return aggType == ATypeTag.NULL;
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevAggregateDescriptor.java
new file mode 100644
index 0000000..41cc3ee
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevAggregateDescriptor.java
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class SqlStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SqlStddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.SQL_STDDEV;
+    }
+
+    @Override
+    public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
+        return new IAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IAggregateEvaluator createAggregateEvaluator(final IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new SqlStddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevAggregateFunction.java
new file mode 100644
index 0000000..962d351
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevAggregateFunction.java
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class SqlStddevAggregateFunction extends AbstractSingleVarStatisticsAggregateFunction {
+
+    public SqlStddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple) throws HyracksDataException {
+        processDataValues(tuple);
+    }
+
+    @Override
+    public void finish(IPointable result) throws HyracksDataException {
+        finishStddevFinalResults(result);
+    }
+
+    @Override
+    public void finishPartial(IPointable result) throws HyracksDataException {
+        finishPartialResults(result);
+    }
+
+    @Override
+    protected void processNull() {
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevAggregateDescriptor.java
new file mode 100644
index 0000000..0b6bb5b
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevAggregateDescriptor.java
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptor;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+
+public class StddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new StddevAggregateDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+    @Override
+    public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
+        return new IAggregateEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IAggregateEvaluator createAggregateEvaluator(final IHyracksTaskContext ctx)
+                    throws HyracksDataException {
+                return new StddevAggregateFunction(args, ctx, sourceLoc);
+            }
+        };
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevAggregateFunction.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevAggregateFunction.java
new file mode 100644
index 0000000..7b5e423
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevAggregateFunction.java
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.asterix.runtime.aggregates.std;
+
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.types.ATypeTag;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.context.IHyracksTaskContext;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.api.exceptions.SourceLocation;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class StddevAggregateFunction extends AbstractSingleVarStatisticsAggregateFunction {
+
+    public StddevAggregateFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext context,
+            SourceLocation sourceLoc) throws HyracksDataException {
+        super(args, context, sourceLoc);
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple) throws HyracksDataException {
+        processDataValues(tuple);
+    }
+
+    @Override
+    public void finish(IPointable result) throws HyracksDataException {
+        finishStddevFinalResults(result);
+    }
+
+    @Override
+    public void finishPartial(IPointable result) throws HyracksDataException {
+        finish(result);
+    }
+
+    @Override
+    protected void processNull() {
+        aggType = ATypeTag.NULL;
+    }
+
+    @Override
+    protected boolean skipStep() {
+        return aggType == ATypeTag.NULL;
+    }
+
+    @Override
+    protected FunctionIdentifier getFunctionIdentifier() {
+        return BuiltinFunctions.STDDEV;
+    }
+
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/utils/SingleVarFunctionsUtil.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/utils/SingleVarFunctionsUtil.java
new file mode 100644
index 0000000..3ce6a39
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/utils/SingleVarFunctionsUtil.java
@@ -0,0 +1,93 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.asterix.runtime.aggregates.utils;
+
+/**
+The central moments of a data sample are useful for calculating statistics (such as stddev and
+variance) in a single pass.
+
+This class is based on a paper written by Philippe Pébay: Formulas for Robust, One-Pass Parallel
+Computation of Covariances and Arbitrary-Order Statistical Moments, 2008, Technical Report
+SAND2008-6212, Sandia National Laboratories.
+*/
+public class SingleVarFunctionsUtil {
+    private double m1;
+    private double m2;
+    private long count;
+
+    public SingleVarFunctionsUtil() {
+        m1 = 0.0;
+        m2 = 0.0;
+        count = 0;
+    }
+
+    /**
+     * Set the central moments of your current data sample
+     *
+     * @param  moment1  first moment (mean) of the data sample
+     * @param  moment2  second moment of the data sample
+     * @param  cnt      number of samples
+     */
+    public void set(double moment1, double moment2, long cnt) {
+        m1 = moment1;
+        m2 = moment2;
+        count = cnt;
+    }
+
+    /**
+     * Update the central moments after adding val to your data sample
+     *
+     * @param  val  value to add to the data sample
+     */
+    public void push(double val) {
+        count++;
+        double delta = val - m1;
+        double delta_n = delta / count;
+        double term1 = delta * delta_n * (count - 1);
+        m1 += delta / count;
+        m2 += term1;
+    }
+
+    /**
+     * Combine two sets of central moments into one.
+     *
+     * @param  moment1  first moment (mean) of the data sample
+     * @param  moment2  second moment of the data sample
+     * @param  cnt      number of samples
+     */
+    public void combine(double moment1, double moment2, long cnt) {
+        double delta = moment1 - m1;
+        long combined_count = count + cnt;
+        m1 = (count * m1 + cnt * moment1) / combined_count;
+        m2 += moment2 + delta * delta * count * cnt / combined_count;
+        count = combined_count;
+    }
+
+    public double getM1() {
+        return m1;
+    }
+
+    public double getM2() {
+        return m2;
+    }
+
+    public long getCount() {
+        return count;
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/functions/FunctionCollection.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/functions/FunctionCollection.java
index 6b0b5d5..9541d69 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/functions/FunctionCollection.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/functions/FunctionCollection.java
@@ -39,35 +39,51 @@
 import org.apache.asterix.runtime.aggregates.scalar.ScalarSqlCountAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.scalar.ScalarSqlMaxAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.scalar.ScalarSqlMinAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.scalar.ScalarSqlStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.scalar.ScalarSqlSumAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.scalar.ScalarStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.scalar.ScalarSumAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableAvgAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableCountAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableGlobalAvgAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableGlobalSqlAvgAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.serializable.std.SerializableGlobalSqlStddevAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.serializable.std.SerializableGlobalStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableIntermediateAvgAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableIntermediateSqlAvgAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.serializable.std.SerializableIntermediateSqlStddevAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.serializable.std.SerializableIntermediateStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableLocalAvgAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableLocalSqlAvgAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.serializable.std.SerializableLocalSqlStddevAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.serializable.std.SerializableLocalStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableLocalSqlSumAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableLocalSumAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableSqlAvgAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableSqlCountAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.serializable.std.SerializableSqlStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableSqlSumAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.serializable.std.SerializableStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.serializable.std.SerializableSumAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.AvgAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.CountAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.GlobalAvgAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.GlobalSqlAvgAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.std.GlobalSqlStddevAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.std.GlobalStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.IntermediateAvgAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.IntermediateSqlAvgAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.std.IntermediateSqlStddevAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.std.IntermediateStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.LocalAvgAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.LocalMaxAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.LocalMinAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.LocalSqlAvgAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.LocalSqlMaxAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.LocalSqlMinAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.std.LocalSqlStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.LocalSqlSumAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.std.LocalStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.LocalSumAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.MaxAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.MinAggregateDescriptor;
@@ -75,7 +91,9 @@
 import org.apache.asterix.runtime.aggregates.std.SqlCountAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.SqlMaxAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.SqlMinAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.std.SqlStddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.SqlSumAggregateDescriptor;
+import org.apache.asterix.runtime.aggregates.std.StddevAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.std.SumAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.stream.EmptyStreamAggregateDescriptor;
 import org.apache.asterix.runtime.aggregates.stream.NonEmptyStreamAggregateDescriptor;
@@ -436,6 +454,10 @@
         fc.add(LocalMinAggregateDescriptor.FACTORY);
         fc.add(FirstElementAggregateDescriptor.FACTORY);
         fc.add(LocalFirstElementAggregateDescriptor.FACTORY);
+        fc.add(StddevAggregateDescriptor.FACTORY);
+        fc.add(LocalStddevAggregateDescriptor.FACTORY);
+        fc.add(IntermediateStddevAggregateDescriptor.FACTORY);
+        fc.add(GlobalStddevAggregateDescriptor.FACTORY);
 
         // serializable aggregates
         fc.add(SerializableCountAggregateDescriptor.FACTORY);
@@ -445,6 +467,10 @@
         fc.add(SerializableGlobalAvgAggregateDescriptor.FACTORY);
         fc.add(SerializableSumAggregateDescriptor.FACTORY);
         fc.add(SerializableLocalSumAggregateDescriptor.FACTORY);
+        fc.add(SerializableStddevAggregateDescriptor.FACTORY);
+        fc.add(SerializableLocalStddevAggregateDescriptor.FACTORY);
+        fc.add(SerializableIntermediateStddevAggregateDescriptor.FACTORY);
+        fc.add(SerializableGlobalStddevAggregateDescriptor.FACTORY);
 
         // scalar aggregates
         fc.add(ScalarCountAggregateDescriptor.FACTORY);
@@ -454,6 +480,7 @@
         fc.add(ScalarMinAggregateDescriptor.FACTORY);
         fc.add(EmptyStreamAggregateDescriptor.FACTORY);
         fc.add(NonEmptyStreamAggregateDescriptor.FACTORY);
+        fc.add(ScalarStddevAggregateDescriptor.FACTORY);
 
         // SQL aggregates
         fc.add(SqlCountAggregateDescriptor.FACTORY);
@@ -467,6 +494,10 @@
         fc.add(LocalSqlMaxAggregateDescriptor.FACTORY);
         fc.add(SqlMinAggregateDescriptor.FACTORY);
         fc.add(LocalSqlMinAggregateDescriptor.FACTORY);
+        fc.add(SqlStddevAggregateDescriptor.FACTORY);
+        fc.add(LocalSqlStddevAggregateDescriptor.FACTORY);
+        fc.add(IntermediateSqlStddevAggregateDescriptor.FACTORY);
+        fc.add(GlobalSqlStddevAggregateDescriptor.FACTORY);
 
         // SQL serializable aggregates
         fc.add(SerializableSqlCountAggregateDescriptor.FACTORY);
@@ -476,6 +507,10 @@
         fc.add(SerializableGlobalSqlAvgAggregateDescriptor.FACTORY);
         fc.add(SerializableSqlSumAggregateDescriptor.FACTORY);
         fc.add(SerializableLocalSqlSumAggregateDescriptor.FACTORY);
+        fc.add(SerializableSqlStddevAggregateDescriptor.FACTORY);
+        fc.add(SerializableLocalSqlStddevAggregateDescriptor.FACTORY);
+        fc.add(SerializableIntermediateSqlStddevAggregateDescriptor.FACTORY);
+        fc.add(SerializableGlobalSqlStddevAggregateDescriptor.FACTORY);
 
         // SQL scalar aggregates
         fc.add(ScalarSqlCountAggregateDescriptor.FACTORY);
@@ -483,6 +518,7 @@
         fc.add(ScalarSqlSumAggregateDescriptor.FACTORY);
         fc.add(ScalarSqlMaxAggregateDescriptor.FACTORY);
         fc.add(ScalarSqlMinAggregateDescriptor.FACTORY);
+        fc.add(ScalarSqlStddevAggregateDescriptor.FACTORY);
 
         // boolean functions
         fc.add(AndDescriptor.FACTORY);