diff --git a/asterixdb/asterix-app/src/test/java/org/apache/asterix/runtime/NullMissingTest.java b/asterixdb/asterix-app/src/test/java/org/apache/asterix/runtime/NullMissingTest.java
index 89494c4..f6f617e 100644
--- a/asterixdb/asterix-app/src/test/java/org/apache/asterix/runtime/NullMissingTest.java
+++ b/asterixdb/asterix-app/src/test/java/org/apache/asterix/runtime/NullMissingTest.java
@@ -41,18 +41,21 @@
 
 public class NullMissingTest {
 
+    private static final String arrayAppend = "ArrayAppendDescriptor";
+
     @Test
     public void test() throws Exception {
         List<IFunctionDescriptorFactory> functions =
                 FunctionCollection.createDefaultFunctionCollection().getFunctionDescriptorFactories();
         int testedFunctions = 0;
+        String[] splits;
         for (IFunctionDescriptorFactory func : functions) {
             String className = func.getClass().getName();
             // We test all generated functions except
             // record and cast functions, which requires type settings (we test them in runtime tests).
-            String[] splits = className.split("\\.");
+            splits = className.split("\\.");
             if (className.contains("Gen") && !className.contains("record") && !className.contains("Cast")
-                    && !splits[splits.length - 1].startsWith("Array")) {
+                    && !splits[splits.length - 1].startsWith(arrayAppend)) {
                 testFunction(func);
                 ++testedFunctions;
             }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.1.ddl.sqlpp
new file mode 100755
index 0000000..257c4dd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.1.ddl.sqlpp
@@ -0,0 +1,46 @@
+/*
+ * 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 TinySocial if exists;
+create  dataverse TinySocial;
+
+use TinySocial;
+
+
+create type TinySocial.TwitterUserType as
+{
+  `screen-name` : string,
+  lang : string,
+  friends_count : bigint,
+  statuses_count : bigint,
+  name : string,
+  followers_count : bigint
+};
+
+create type TinySocial.TweetMessageType as
+ closed {
+  tweetid : string,
+  user : TwitterUserType,
+  `sender-location` : point?,
+  `send-time` : datetime,
+  `referred-topics` : {{string}},
+  `message-text` : string
+};
+
+create  dataset TweetMessages(TweetMessageType) primary key tweetid hints (`CARDINALITY`=`100`);
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.2.update.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.2.update.sqlpp
new file mode 100755
index 0000000..4a0e7ed
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.2.update.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.
+ */
+
+use TinySocial;
+
+load  dataset TweetMessages using localfs ((`path`=`asterix_nc1://data/tinysocial/twm.adm`),(`format`=`adm`));
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.3.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.3.query.sqlpp
new file mode 100755
index 0000000..afdada2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.3.query.sqlpp
@@ -0,0 +1,34 @@
+/*
+ * 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 TinySocial;
+
+{
+  "t1": (select array_position(t.`referred-topics`, "speed") from TweetMessages t order by t.tweetid),
+  "t2": (select array_position([3,8,98,40], 8)),
+  "t3": (select array_position([3,8,98,40], 40.0)),
+  "t4": (select array_position([3,8,98,40], -3)),
+  "t5": (select array_position([3,"sth",98,40], 98)),
+  "t6": (select array_position([3,8,98,40], null)),
+  "t7": (select array_position([3,8,98,40], missing)),
+  "t8": (select array_position(missing, 6)),
+  "t9": (select array_position(null, 6)),
+  "t10": (select array_position(5, "sth")),
+  "t11": (select array_position([5, {"id":77}, "sth"], "sth"))
+};
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.4.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.4.query.sqlpp
new file mode 100755
index 0000000..82ecbf0
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.4.query.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.
+ */
+
+use TinySocial;
+
+select array_position([5,1,9], [2,3]);
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.5.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.5.query.sqlpp
new file mode 100755
index 0000000..3f9e4fc
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.5.query.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.
+ */
+
+use TinySocial;
+
+select array_position([5,{"id": 5},9], {"id": 5});
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.6.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.6.ddl.sqlpp
new file mode 100644
index 0000000..3f8c8ec
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array_fun/array_position/array_position.6.ddl.sqlpp
@@ -0,0 +1,20 @@
+/*
+ * 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 TinySocial;
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array_fun/array_position/array_position.3.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array_fun/array_position/array_position.3.adm
new file mode 100644
index 0000000..e5f1b8f
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/array_fun/array_position/array_position.3.adm
@@ -0,0 +1 @@
+{ "t1": [ { "$1": -1 }, { "$1": -1 }, { "$1": -1 }, { "$1": -1 }, { "$1": -1 }, { "$1": 1 }, { "$1": -1 }, { "$1": 1 }, { "$1": -1 }, { "$1": -1 }, { "$1": -1 }, { "$1": -1 } ], "t2": [ { "$2": 1 } ], "t3": [ { "$3": 3 } ], "t4": [ { "$4": -1 } ], "t5": [ { "$5": 2 } ], "t6": [ { "$6": null } ], "t7": [ {  } ], "t8": [ {  } ], "t9": [ { "$9": null } ], "t10": [ { "$10": null } ], "t11": [ { "$11": 2 } ] }
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 a6613cd..0934e56 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
@@ -988,6 +988,13 @@
         <output-dir compare="Text">array_append</output-dir>
       </compilation-unit>
     </test-case>
+    <test-case FilePath="array_fun">
+      <compilation-unit name="array_position">
+        <output-dir compare="Text">array_position</output-dir>
+        <expected-error>HYR0115: Cannot compare non-primitive values (in line 22, at column 8)</expected-error>
+        <expected-error>HYR0115: Cannot compare non-primitive values (in line 22, at column 8)</expected-error>
+      </compilation-unit>
+    </test-case>
   </test-group>
   <test-group name="boolean">
     <test-case FilePath="boolean">
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 249e169..f73533c 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
@@ -185,6 +185,8 @@
     // array functions
     public static final FunctionIdentifier ARRAY_APPEND =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "array-append", FunctionIdentifier.VARARGS);
+    public static final FunctionIdentifier ARRAY_POSITION =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "array-position", 2);
 
     // objects
     public static final FunctionIdentifier RECORD_MERGE =
@@ -1461,6 +1463,7 @@
 
         // array functions
         addFunction(ARRAY_APPEND, ArrayAppendTypeComputer.INSTANCE, true);
+        addFunction(ARRAY_POSITION, AInt32TypeComputer.INSTANCE, true);
 
         // objects
         addFunction(RECORD_MERGE, RecordMergeTypeComputer.INSTANCE, true);
diff --git a/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/types/ATypeTag.java b/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/types/ATypeTag.java
index a79588d..f2b004f 100644
--- a/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/types/ATypeTag.java
+++ b/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/types/ATypeTag.java
@@ -135,6 +135,10 @@
         return this == ATypeTag.OBJECT || this == ATypeTag.ARRAY || this == ATypeTag.MULTISET || this == ATypeTag.UNION;
     }
 
+    public final boolean isListType() {
+        return this == ATypeTag.ARRAY || this == ATypeTag.MULTISET;
+    }
+
     @Override
     public String toString() {
         return this.name().toLowerCase();
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayAppendDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayAppendDescriptor.java
index a44397c..3792b8e 100755
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayAppendDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayAppendDescriptor.java
@@ -18,6 +18,8 @@
  */
 package org.apache.asterix.runtime.evaluators.functions;
 
+import static org.apache.asterix.om.types.EnumDeserializer.ATYPETAGDESERIALIZER;
+
 import java.io.IOException;
 import java.util.Arrays;
 
@@ -29,7 +31,6 @@
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.functions.IFunctionTypeInferer;
 import org.apache.asterix.om.pointables.base.DefaultOpenFieldType;
-import org.apache.asterix.om.types.AOrderedListType;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.AbstractCollectionType;
 import org.apache.asterix.om.types.IAType;
@@ -144,8 +145,7 @@
                 }
             }
 
-            if (listArgType != ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG
-                    && listArgType != ATypeTag.SERIALIZED_UNORDEREDLIST_TYPE_TAG) {
+            if (!ATYPETAGDESERIALIZER.deserialize(listArgType).isListType()) {
                 PointableHelper.setNull(result);
                 return;
             }
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayPositionDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayPositionDescriptor.java
new file mode 100755
index 0000000..caf93b0
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayPositionDescriptor.java
@@ -0,0 +1,146 @@
+/*
+ * 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.evaluators.functions;
+
+import static org.apache.asterix.om.types.EnumDeserializer.ATYPETAGDESERIALIZER;
+
+import java.io.IOException;
+
+import org.apache.asterix.dataflow.data.nontagged.comparators.AObjectAscBinaryComparatorFactory;
+import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
+import org.apache.asterix.om.base.AMutableInt32;
+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.om.types.BuiltinType;
+import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import org.apache.asterix.runtime.evaluators.common.ListAccessor;
+import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
+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.IBinaryComparator;
+import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer;
+import org.apache.hyracks.api.exceptions.ErrorCode;
+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.ArrayBackedValueStorage;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class ArrayPositionDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+    private static final long serialVersionUID = 1L;
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new ArrayPositionDescriptor();
+        }
+    };
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.ARRAY_POSITION;
+    }
+
+    @Override
+    public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args)
+            throws AlgebricksException {
+        return new IScalarEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IScalarEvaluator createScalarEvaluator(final IHyracksTaskContext ctx) throws HyracksDataException {
+                return new ArrayPositionFunction(args, ctx);
+            }
+        };
+    }
+
+    public class ArrayPositionFunction implements IScalarEvaluator {
+        private final ArrayBackedValueStorage storage;
+        private final IPointable listArg;
+        private final IPointable searchedValueArg;
+        private final IScalarEvaluator listEval;
+        private final IScalarEvaluator searchedValueEval;
+        private final IBinaryComparator comp;
+        private final ListAccessor listAccessor;
+        private final AMutableInt32 intValue;
+        private final ISerializerDeserializer intSerde;
+
+        public ArrayPositionFunction(IScalarEvaluatorFactory[] args, IHyracksTaskContext ctx)
+                throws HyracksDataException {
+            storage = new ArrayBackedValueStorage();
+            listArg = new VoidPointable();
+            searchedValueArg = new VoidPointable();
+            listEval = args[0].createScalarEvaluator(ctx);
+            searchedValueEval = args[1].createScalarEvaluator(ctx);
+            comp = AObjectAscBinaryComparatorFactory.INSTANCE.createBinaryComparator();
+            listAccessor = new ListAccessor();
+            intValue = new AMutableInt32(-1);
+            intSerde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT32);
+        }
+
+        @Override
+        public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
+            // 1st arg: list
+            listEval.evaluate(tuple, listArg);
+            byte[] listBytes = listArg.getByteArray();
+            int listOffset = listArg.getStartOffset();
+
+            // 2nd arg: value to search for
+            searchedValueEval.evaluate(tuple, searchedValueArg);
+            byte[] valueBytes = searchedValueArg.getByteArray();
+            int valueOffset = searchedValueArg.getStartOffset();
+            int valueLength = searchedValueArg.getLength();
+
+            // for now, we don't support deep equality of object/lists. Throw an error if the value is of these types
+            if (ATYPETAGDESERIALIZER.deserialize(valueBytes[valueOffset]).isDerivedType()) {
+                throw HyracksDataException.create(ErrorCode.CANNOT_COMPARE_COMPLEX, sourceLoc);
+            }
+
+            if (!ATYPETAGDESERIALIZER.deserialize(listBytes[listOffset]).isListType()) {
+                PointableHelper.setNull(result);
+                return;
+            }
+
+            listAccessor.reset(listBytes, listOffset);
+            int numItems = listAccessor.size();
+            intValue.setValue(-1);
+
+            try {
+                for (int i = 0; i < numItems; i++) {
+                    storage.reset();
+                    listAccessor.writeItem(i, storage.getDataOutput());
+                    if (comp.compare(storage.getByteArray(), storage.getStartOffset(), storage.getLength(), valueBytes,
+                            valueOffset, valueLength) == 0) {
+                        intValue.setValue(i);
+                        break;
+                    }
+                }
+            } catch (IOException e) {
+                throw HyracksDataException.create(e);
+            }
+
+            storage.reset();
+            intSerde.serialize(intValue, storage.getDataOutput());
+            result.set(storage);
+        }
+    }
+}
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 406c5b9..f64df0a 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
@@ -144,6 +144,7 @@
 import org.apache.asterix.runtime.evaluators.functions.AndDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.AnyCollectionMemberDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.ArrayAppendDescriptor;
+import org.apache.asterix.runtime.evaluators.functions.ArrayPositionDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.CastTypeDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.CastTypeLaxDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.CheckUnknownDescriptor;
@@ -372,6 +373,7 @@
 
         // array functions
         fc.addGenerated(ArrayAppendDescriptor.FACTORY);
+        fc.addGenerated(ArrayPositionDescriptor.FACTORY);
 
         // unnesting functions
         fc.add(TidRunningAggregateDescriptor.FACTORY);
diff --git a/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/exceptions/ErrorCode.java b/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/exceptions/ErrorCode.java
index b6d7cc7..5f91e89 100644
--- a/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/exceptions/ErrorCode.java
+++ b/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/exceptions/ErrorCode.java
@@ -148,6 +148,7 @@
     public static final int CANNOT_ADD_ELEMENT_TO_INVERTED_INDEX_SEARCH_RESULT = 112;
     public static final int UNDEFINED_INVERTED_LIST_MERGE_TYPE = 113;
     public static final int NODE_IS_NOT_ACTIVE = 114;
+    public static final int CANNOT_COMPARE_COMPLEX = 115;
 
     // Compilation error codes.
     public static final int RULECOLLECTION_NOT_INSTANCE_OF_LIST = 10000;
diff --git a/hyracks-fullstack/hyracks/hyracks-api/src/main/resources/errormsg/en.properties b/hyracks-fullstack/hyracks/hyracks-api/src/main/resources/errormsg/en.properties
index ef07038..ea58c3c 100644
--- a/hyracks-fullstack/hyracks/hyracks-api/src/main/resources/errormsg/en.properties
+++ b/hyracks-fullstack/hyracks/hyracks-api/src/main/resources/errormsg/en.properties
@@ -131,6 +131,7 @@
 112 = Cannot add an element to an inverted-index search result.
 113 = Undefined inverted-list merge type: %1$s
 114 = Node (%1$s) is not active
+115 = Cannot compare non-primitive values
 
 10000 = The given rule collection %1$s is not an instance of the List class.
 10001 = Cannot compose partition constraint %1$s with %2$s