diff --git a/asterixdb/asterix-algebra/src/main/java/org/apache/asterix/optimizer/rules/am/ArrayBTreeAccessMethod.java b/asterixdb/asterix-algebra/src/main/java/org/apache/asterix/optimizer/rules/am/ArrayBTreeAccessMethod.java
index 44e4a18..653d15b 100644
--- a/asterixdb/asterix-algebra/src/main/java/org/apache/asterix/optimizer/rules/am/ArrayBTreeAccessMethod.java
+++ b/asterixdb/asterix-algebra/src/main/java/org/apache/asterix/optimizer/rules/am/ArrayBTreeAccessMethod.java
@@ -25,16 +25,22 @@
 import org.apache.asterix.common.config.DatasetConfig.IndexType;
 import org.apache.asterix.common.exceptions.CompilationException;
 import org.apache.asterix.common.exceptions.ErrorCode;
+import org.apache.asterix.metadata.entities.Dataset;
 import org.apache.asterix.metadata.entities.Index;
 import org.apache.asterix.metadata.utils.ArrayIndexUtil;
 import org.apache.asterix.om.types.IAType;
 import org.apache.asterix.om.utils.NonTaggedFormatUtil;
 import org.apache.commons.lang3.mutable.Mutable;
+import org.apache.commons.lang3.mutable.MutableObject;
 import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
 import org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression;
 import org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator;
 import org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext;
+import org.apache.hyracks.algebricks.core.algebra.base.LogicalOperatorTag;
 import org.apache.hyracks.algebricks.core.algebra.base.LogicalVariable;
+import org.apache.hyracks.algebricks.core.algebra.operators.logical.AbstractBinaryJoinOperator;
+import org.apache.hyracks.algebricks.core.algebra.operators.logical.LeftOuterUnnestOperator;
+import org.apache.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator;
 
 // TODO (GLENN): Refactor the BTreeAccessMethod class and this class to extend a new "AbstractBTreeAccessMethod" class.
 /**
@@ -71,6 +77,80 @@
     }
 
     @Override
+    public boolean applyJoinPlanTransformation(List<Mutable<ILogicalOperator>> afterJoinRefs,
+            Mutable<ILogicalOperator> joinRef, OptimizableOperatorSubTree leftSubTree,
+            OptimizableOperatorSubTree rightSubTree, Index chosenIndex, AccessMethodAnalysisContext analysisCtx,
+            IOptimizationContext context, boolean isLeftOuterJoin, boolean isLeftOuterJoinWithSpecialGroupBy)
+            throws AlgebricksException {
+        AbstractBinaryJoinOperator joinOp = (AbstractBinaryJoinOperator) joinRef.getValue();
+        Mutable<ILogicalExpression> conditionRef = joinOp.getCondition();
+        Dataset dataset = analysisCtx.getIndexDatasetMap().get(chosenIndex);
+        OptimizableOperatorSubTree indexSubTree, probeSubTree;
+
+        // We assume that the left subtree is the outer branch and the right subtree is the inner branch. This
+        // assumption holds true since we only use an index from the right subtree. The following is just a sanity
+        // check.
+        if (rightSubTree.hasDataSourceScan()
+                && dataset.getDatasetName().equals(rightSubTree.getDataset().getDatasetName())) {
+            indexSubTree = rightSubTree;
+            probeSubTree = leftSubTree;
+        } else {
+            return false;
+        }
+
+        LogicalVariable newNullPlaceHolderVar = null;
+        if (isLeftOuterJoin) {
+            // Gets a new null place holder variable that is the first field variable of the primary key from the
+            // indexSubTree's datasourceScanOp. We need this for all left outer joins, even those that do not have
+            // a special GroupBy.
+            newNullPlaceHolderVar = indexSubTree.getDataSourceVariables().get(0);
+
+            // For all INNER-UNNESTs associated with the inner subtree (i.e. the index subtree) to extract the
+            // secondary keys, transform these UNNESTs to LEFT-OUTER-UNNESTs. This is to ensure that probe entries w/o
+            // a corresponding secondary key entry are not incorrectly removed. This will not invalidate our fetched
+            // entries because *all* index entries have a non-empty array.
+            ILogicalOperator workingOp = indexSubTree.getRoot(), rootOp = indexSubTree.getRoot(), previousOp = null;
+            while (!workingOp.getInputs().isEmpty()) {
+                if (workingOp.getOperatorTag() == LogicalOperatorTag.UNNEST) {
+                    UnnestOperator oldUnnest = (UnnestOperator) workingOp;
+                    LeftOuterUnnestOperator newUnnest = new LeftOuterUnnestOperator(oldUnnest.getVariable(),
+                            new MutableObject<>(oldUnnest.getExpressionRef().getValue()));
+                    newUnnest.setSourceLocation(oldUnnest.getSourceLocation());
+                    newUnnest.getInputs().addAll(oldUnnest.getInputs());
+                    newUnnest.setExecutionMode(oldUnnest.getExecutionMode());
+                    context.computeAndSetTypeEnvironmentForOperator(newUnnest);
+                    if (workingOp.equals(rootOp)) {
+                        rootOp = newUnnest;
+                        workingOp = newUnnest;
+                    } else if (previousOp != null) {
+                        previousOp.getInputs().clear();
+                        previousOp.getInputs().add(new MutableObject<>(newUnnest));
+                        context.computeAndSetTypeEnvironmentForOperator(previousOp);
+                    }
+                }
+                previousOp = workingOp;
+                workingOp = workingOp.getInputs().get(0).getValue();
+            }
+            indexSubTree.setRoot(rootOp);
+            indexSubTree.setRootRef(new MutableObject<>(rootOp));
+            joinOp.getInputs().remove(1);
+            joinOp.getInputs().add(1, new MutableObject<>(rootOp));
+            context.computeAndSetTypeEnvironmentForOperator(joinOp);
+        }
+
+        ILogicalOperator indexSearchOp = createIndexSearchPlan(afterJoinRefs, joinRef, conditionRef,
+                indexSubTree.getAssignsAndUnnestsRefs(), indexSubTree, probeSubTree, chosenIndex, analysisCtx, true,
+                isLeftOuterJoin, true, context, newNullPlaceHolderVar);
+        if (indexSearchOp == null) {
+            return false;
+        }
+
+        return AccessMethodUtils.finalizeJoinPlanTransformation(afterJoinRefs, joinRef, indexSubTree, probeSubTree,
+                analysisCtx, context, isLeftOuterJoin, isLeftOuterJoinWithSpecialGroupBy, indexSearchOp,
+                newNullPlaceHolderVar, conditionRef, dataset);
+    }
+
+    @Override
     public ILogicalOperator createIndexSearchPlan(List<Mutable<ILogicalOperator>> afterTopOpRefs,
             Mutable<ILogicalOperator> topOpRef, Mutable<ILogicalExpression> conditionRef,
             List<Mutable<ILogicalOperator>> assignBeforeTheOpRefs, OptimizableOperatorSubTree indexSubTree,
diff --git a/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-1/query4.sqlpp b/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-1/query4.sqlpp
new file mode 100644
index 0000000..6147325
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-1/query4.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.
+ */
+SET `compiler.arrayindex` "true";
+
+DROP DATAVERSE TestYelp IF EXISTS;
+CREATE DATAVERSE TestYelp;
+USE TestYelp;
+
+CREATE TYPE CheckinType AS {
+    checkin_id: uuid,
+    business_id: string,
+    dates: [string]
+};
+CREATE TYPE CheckinDatesToMarkersType AS {
+    marker: string,
+    datetime: string,
+    date: string,
+    time: string
+};
+
+CREATE DATASET YelpCheckin(CheckinType) PRIMARY KEY checkin_id AUTOGENERATED;
+CREATE DATASET YelpCheckinDateMarkers (CheckinDatesToMarkersType) PRIMARY KEY marker;
+CREATE INDEX IdxYelpCheckinDates ON YelpCheckin (UNNEST dates);
+
+SELECT COUNT(*)
+FROM YelpCheckinDateMarkers M
+LEFT OUTER JOIN (
+    SELECT VALUE D
+    FROM YelpCheckin C, C.dates D
+) AS CD ON CD /*+ indexnl */ = M.datetime;
diff --git a/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-2/query4.sqlpp b/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-2/query4.sqlpp
new file mode 100644
index 0000000..5be3ede
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-2/query4.sqlpp
@@ -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.
+ */
+SET `compiler.arrayindex` "true";
+
+DROP DATAVERSE TestYelp IF EXISTS;
+CREATE DATAVERSE TestYelp;
+USE TestYelp;
+
+CREATE TYPE CheckinType AS {
+    checkin_id: uuid,
+    business_id: string,
+    checkin_times: {
+        dates: [string],
+        times: [string]
+    }
+};
+CREATE TYPE CheckinDatesToMarkersType AS {
+    marker: string,
+    datetime: string,
+    date: string,
+    time: string
+};
+
+CREATE DATASET YelpCheckin(CheckinType) PRIMARY KEY checkin_id AUTOGENERATED;
+CREATE DATASET YelpCheckinDateMarkers (CheckinDatesToMarkersType) PRIMARY KEY marker;
+CREATE INDEX IdxYelpCheckinDates ON YelpCheckin (UNNEST checkin_times.dates);
+
+SELECT COUNT(*)
+FROM YelpCheckinDateMarkers M
+LEFT OUTER JOIN (
+    SELECT VALUE D
+    FROM YelpCheckin C, C.checkin_times.dates D
+) AS CD ON CD /*+ indexnl */ = M.date;
diff --git a/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-3/query5.sqlpp b/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-3/query5.sqlpp
new file mode 100644
index 0000000..0b595d7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-3/query5.sqlpp
@@ -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.
+ */
+SET `compiler.arrayindex` "true";
+
+DROP DATAVERSE TestYelp IF EXISTS;
+CREATE DATAVERSE TestYelp;
+USE TestYelp;
+
+CREATE TYPE CheckinType AS {
+    checkin_id: uuid,
+    business_id: string,
+    checkin_times: [{
+        date: string,
+        time: string
+    }]
+};
+CREATE TYPE CheckinDatesToMarkersType AS {
+    marker: string,
+    datetime: string,
+    date: string,
+    time: string
+};
+
+CREATE DATASET YelpCheckin(CheckinType) PRIMARY KEY checkin_id AUTOGENERATED;
+CREATE DATASET YelpCheckinDateMarkers (CheckinDatesToMarkersType) PRIMARY KEY marker;
+CREATE INDEX IdxYelpCheckinDates ON YelpCheckin (UNNEST checkin_times SELECT date);
+
+SELECT COUNT(*)
+FROM YelpCheckinDateMarkers M
+LEFT OUTER JOIN (
+    SELECT VALUE D.date
+    FROM YelpCheckin C, C.checkin_times D
+) AS CD ON CD /*+ indexnl */ = M.date;
diff --git a/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-4/query5.sqlpp b/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-4/query5.sqlpp
new file mode 100644
index 0000000..d5c3295
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/optimizerts/queries/array-index/join-unnest-queries/use-case-4/query5.sqlpp
@@ -0,0 +1,50 @@
+/*
+ * 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.
+ */
+SET `compiler.arrayindex` "true";
+
+DROP DATAVERSE TestYelp IF EXISTS;
+CREATE DATAVERSE TestYelp;
+USE TestYelp;
+
+CREATE TYPE CheckinType AS {
+    checkin_id: uuid,
+    business_id: string,
+    checkin_times: [{
+        checkin_times_id: int,
+        dates: [string],
+        times: [string]
+    }]
+};
+CREATE TYPE CheckinDatesToMarkersType AS {
+    marker: string,
+    datetime: string,
+    date: string,
+    time: string
+};
+
+CREATE DATASET YelpCheckin(CheckinType) PRIMARY KEY checkin_id AUTOGENERATED;
+CREATE DATASET YelpCheckinDateMarkers (CheckinDatesToMarkersType) PRIMARY KEY marker;
+CREATE INDEX IdxYelpCheckinDates ON YelpCheckin (UNNEST checkin_times UNNEST dates);
+
+SELECT COUNT(*)
+FROM YelpCheckinDateMarkers M
+LEFT OUTER JOIN (
+    SELECT VALUE D
+    FROM YelpCheckin C, C.checkin_times CT, CT.dates D
+) AS CD ON CD /*+ indexnl */ = M.date;
diff --git a/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-1/query4.plan b/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-1/query4.plan
new file mode 100644
index 0000000..f602149
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-1/query4.plan
@@ -0,0 +1,37 @@
+-- DISTRIBUTE_RESULT  |UNPARTITIONED|
+  -- ONE_TO_ONE_EXCHANGE  |UNPARTITIONED|
+    -- STREAM_PROJECT  |UNPARTITIONED|
+      -- ASSIGN  |UNPARTITIONED|
+        -- AGGREGATE  |UNPARTITIONED|
+          -- RANDOM_MERGE_EXCHANGE  |PARTITIONED|
+            -- AGGREGATE  |PARTITIONED|
+              -- STREAM_SELECT  |PARTITIONED|
+                -- STREAM_PROJECT  |PARTITIONED|
+                  -- WINDOW_STREAM  |PARTITIONED|
+                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                      -- STABLE_SORT [$$70(ASC), $$71(DESC)]  |PARTITIONED|
+                        -- HASH_PARTITION_EXCHANGE [$$70]  |PARTITIONED|
+                          -- STREAM_PROJECT  |PARTITIONED|
+                            -- STREAM_SELECT  |PARTITIONED|
+                              -- STREAM_PROJECT  |PARTITIONED|
+                                -- LEFT_OUTER_UNNEST  |PARTITIONED|
+                                  -- STREAM_PROJECT  |PARTITIONED|
+                                    -- ASSIGN  |PARTITIONED|
+                                      -- STREAM_PROJECT  |PARTITIONED|
+                                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                          -- BTREE_SEARCH (TestYelp.YelpCheckin.YelpCheckin)  |PARTITIONED|
+                                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                              -- PRE_SORTED_DISTINCT_BY  |PARTITIONED|
+                                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                  -- STABLE_SORT [$$79(ASC), $$70(ASC)]  |PARTITIONED|
+                                                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                      -- STREAM_PROJECT  |PARTITIONED|
+                                                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                          -- BTREE_SEARCH (TestYelp.YelpCheckin.IdxYelpCheckinDates)  |PARTITIONED|
+                                                            -- BROADCAST_EXCHANGE  |PARTITIONED|
+                                                              -- STREAM_PROJECT  |PARTITIONED|
+                                                                -- ASSIGN  |PARTITIONED|
+                                                                  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                                    -- DATASOURCE_SCAN (TestYelp.YelpCheckinDateMarkers)  |PARTITIONED|
+                                                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-2/query4.plan b/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-2/query4.plan
new file mode 100644
index 0000000..44fd353
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-2/query4.plan
@@ -0,0 +1,37 @@
+-- DISTRIBUTE_RESULT  |UNPARTITIONED|
+  -- ONE_TO_ONE_EXCHANGE  |UNPARTITIONED|
+    -- STREAM_PROJECT  |UNPARTITIONED|
+      -- ASSIGN  |UNPARTITIONED|
+        -- AGGREGATE  |UNPARTITIONED|
+          -- RANDOM_MERGE_EXCHANGE  |PARTITIONED|
+            -- AGGREGATE  |PARTITIONED|
+              -- STREAM_SELECT  |PARTITIONED|
+                -- STREAM_PROJECT  |PARTITIONED|
+                  -- WINDOW_STREAM  |PARTITIONED|
+                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                      -- STABLE_SORT [$$71(ASC), $$72(DESC)]  |PARTITIONED|
+                        -- HASH_PARTITION_EXCHANGE [$$71]  |PARTITIONED|
+                          -- STREAM_PROJECT  |PARTITIONED|
+                            -- STREAM_SELECT  |PARTITIONED|
+                              -- STREAM_PROJECT  |PARTITIONED|
+                                -- LEFT_OUTER_UNNEST  |PARTITIONED|
+                                  -- STREAM_PROJECT  |PARTITIONED|
+                                    -- ASSIGN  |PARTITIONED|
+                                      -- STREAM_PROJECT  |PARTITIONED|
+                                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                          -- BTREE_SEARCH (TestYelp.YelpCheckin.YelpCheckin)  |PARTITIONED|
+                                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                              -- PRE_SORTED_DISTINCT_BY  |PARTITIONED|
+                                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                  -- STABLE_SORT [$$81(ASC), $$71(ASC)]  |PARTITIONED|
+                                                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                      -- STREAM_PROJECT  |PARTITIONED|
+                                                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                          -- BTREE_SEARCH (TestYelp.YelpCheckin.IdxYelpCheckinDates)  |PARTITIONED|
+                                                            -- BROADCAST_EXCHANGE  |PARTITIONED|
+                                                              -- STREAM_PROJECT  |PARTITIONED|
+                                                                -- ASSIGN  |PARTITIONED|
+                                                                  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                                    -- DATASOURCE_SCAN (TestYelp.YelpCheckinDateMarkers)  |PARTITIONED|
+                                                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-3/query5.plan b/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-3/query5.plan
new file mode 100644
index 0000000..0497e66
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-3/query5.plan
@@ -0,0 +1,37 @@
+-- DISTRIBUTE_RESULT  |UNPARTITIONED|
+  -- ONE_TO_ONE_EXCHANGE  |UNPARTITIONED|
+    -- STREAM_PROJECT  |UNPARTITIONED|
+      -- ASSIGN  |UNPARTITIONED|
+        -- AGGREGATE  |UNPARTITIONED|
+          -- RANDOM_MERGE_EXCHANGE  |PARTITIONED|
+            -- AGGREGATE  |PARTITIONED|
+              -- STREAM_SELECT  |PARTITIONED|
+                -- STREAM_PROJECT  |PARTITIONED|
+                  -- WINDOW_STREAM  |PARTITIONED|
+                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                      -- STABLE_SORT [$$72(ASC), $$73(DESC)]  |PARTITIONED|
+                        -- HASH_PARTITION_EXCHANGE [$$72]  |PARTITIONED|
+                          -- STREAM_PROJECT  |PARTITIONED|
+                            -- STREAM_SELECT  |PARTITIONED|
+                              -- STREAM_PROJECT  |PARTITIONED|
+                                -- LEFT_OUTER_UNNEST  |PARTITIONED|
+                                  -- STREAM_PROJECT  |PARTITIONED|
+                                    -- ASSIGN  |PARTITIONED|
+                                      -- STREAM_PROJECT  |PARTITIONED|
+                                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                          -- BTREE_SEARCH (TestYelp.YelpCheckin.YelpCheckin)  |PARTITIONED|
+                                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                              -- PRE_SORTED_DISTINCT_BY  |PARTITIONED|
+                                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                  -- STABLE_SORT [$$81(ASC), $$72(ASC)]  |PARTITIONED|
+                                                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                      -- STREAM_PROJECT  |PARTITIONED|
+                                                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                          -- BTREE_SEARCH (TestYelp.YelpCheckin.IdxYelpCheckinDates)  |PARTITIONED|
+                                                            -- BROADCAST_EXCHANGE  |PARTITIONED|
+                                                              -- STREAM_PROJECT  |PARTITIONED|
+                                                                -- ASSIGN  |PARTITIONED|
+                                                                  -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                                    -- DATASOURCE_SCAN (TestYelp.YelpCheckinDateMarkers)  |PARTITIONED|
+                                                                      -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                                        -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-4/query5.plan b/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-4/query5.plan
new file mode 100644
index 0000000..aac007e
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/optimizerts/results/array-index/join-unnest-queries/use-case-4/query5.plan
@@ -0,0 +1,41 @@
+-- DISTRIBUTE_RESULT  |UNPARTITIONED|
+  -- ONE_TO_ONE_EXCHANGE  |UNPARTITIONED|
+    -- STREAM_PROJECT  |UNPARTITIONED|
+      -- ASSIGN  |UNPARTITIONED|
+        -- AGGREGATE  |UNPARTITIONED|
+          -- RANDOM_MERGE_EXCHANGE  |PARTITIONED|
+            -- AGGREGATE  |PARTITIONED|
+              -- STREAM_SELECT  |PARTITIONED|
+                -- STREAM_PROJECT  |PARTITIONED|
+                  -- WINDOW_STREAM  |PARTITIONED|
+                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                      -- STABLE_SORT [$$81(ASC), $$82(DESC)]  |PARTITIONED|
+                        -- HASH_PARTITION_EXCHANGE [$$81]  |PARTITIONED|
+                          -- STREAM_PROJECT  |PARTITIONED|
+                            -- STREAM_SELECT  |PARTITIONED|
+                              -- STREAM_PROJECT  |PARTITIONED|
+                                -- LEFT_OUTER_UNNEST  |PARTITIONED|
+                                  -- STREAM_PROJECT  |PARTITIONED|
+                                    -- ASSIGN  |PARTITIONED|
+                                      -- STREAM_PROJECT  |PARTITIONED|
+                                        -- LEFT_OUTER_UNNEST  |PARTITIONED|
+                                          -- STREAM_PROJECT  |PARTITIONED|
+                                            -- ASSIGN  |PARTITIONED|
+                                              -- STREAM_PROJECT  |PARTITIONED|
+                                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                  -- BTREE_SEARCH (TestYelp.YelpCheckin.YelpCheckin)  |PARTITIONED|
+                                                    -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                      -- PRE_SORTED_DISTINCT_BY  |PARTITIONED|
+                                                        -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                          -- STABLE_SORT [$$91(ASC), $$81(ASC)]  |PARTITIONED|
+                                                            -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                              -- STREAM_PROJECT  |PARTITIONED|
+                                                                -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                                  -- BTREE_SEARCH (TestYelp.YelpCheckin.IdxYelpCheckinDates)  |PARTITIONED|
+                                                                    -- BROADCAST_EXCHANGE  |PARTITIONED|
+                                                                      -- STREAM_PROJECT  |PARTITIONED|
+                                                                        -- ASSIGN  |PARTITIONED|
+                                                                          -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                                            -- DATASOURCE_SCAN (TestYelp.YelpCheckinDateMarkers)  |PARTITIONED|
+                                                                              -- ONE_TO_ONE_EXCHANGE  |PARTITIONED|
+                                                                                -- EMPTY_TUPLE_SOURCE  |PARTITIONED|
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-1/use-case-1.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-1/use-case-1.1.ddl.sqlpp
index 39f18a0..3e7c0c9 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-1/use-case-1.1.ddl.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-1/use-case-1.1.ddl.sqlpp
@@ -22,7 +22,7 @@
  *     1) Implicit INNER JOIN query, with additional predicate on inner collection before the unnest.
  *     2) Implicit INNER JOIN query, with additional predicate on the outer collection.
  *     3) Explicit INNER JOIN query using UNNEST subquery, no additional predicate.
- *     TODO (GLENN) 4) Explicit LEFT OUTER JOIN query using UNNEST subquery, no additional predicate.
+ *     4) Explicit LEFT OUTER JOIN query using UNNEST subquery, no additional predicate.
  */
 
 DROP DATAVERSE TestYelp IF EXISTS;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-1/use-case-1.8.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-1/use-case-1.8.query.sqlpp
new file mode 100644
index 0000000..7bfe568
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-1/use-case-1.8.query.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.
+ */
+
+SET `compiler.arrayindex` "true";
+USE TestYelp;
+
+FROM     YelpCheckinDateMarkers M
+LEFT OUTER JOIN (
+    FROM    YelpCheckin C, C.dates CD
+    SELECT  VALUE CD
+)        AS D ON D /*+ indexnl */ = M.datetime
+SELECT   COUNT(*);
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-2/use-case-2.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-2/use-case-2.1.ddl.sqlpp
index a00ffca..4e89d6a 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-2/use-case-2.1.ddl.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-2/use-case-2.1.ddl.sqlpp
@@ -22,7 +22,7 @@
  *     1) INNER JOIN query, with additional predicate on inner collection before the unnest.
  *     2) INNER JOIN query, with additional predicate on the outer collection.
  *     3) Explicit INNER JOIN query using UNNEST subquery, no additional predicate.
- *     TODO (GLENN) 4) Explicit LEFT OUTER JOIN query using UNNEST subquery, no additional predicate.
+ *     4) Explicit LEFT OUTER JOIN query using UNNEST subquery, no additional predicate.
  */
 
 DROP DATAVERSE TestYelp IF EXISTS;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-2/use-case-2.8.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-2/use-case-2.8.query.sqlpp
new file mode 100644
index 0000000..0414384
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-2/use-case-2.8.query.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.
+ */
+
+SET `compiler.arrayindex` "true";
+USE TestYelp;
+
+FROM     YelpCheckinDateMarkers M
+LEFT OUTER JOIN (
+    FROM    YelpCheckin C, C.checkin_times.dates CD
+    SELECT  VALUE CD
+)        AS D ON D /*+ indexnl */ = M.datetime
+SELECT   COUNT(*);
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-3/use-case-3.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-3/use-case-3.1.ddl.sqlpp
index fed0346..d7c49d1 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-3/use-case-3.1.ddl.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-3/use-case-3.1.ddl.sqlpp
@@ -23,7 +23,7 @@
  *     2) INNER JOIN query, with additional predicate on inner collection after the unnest.
  *     3) INNER JOIN query, with additional predicate on the outer collection.
  *     4) Explicit INNER JOIN query using UNNEST subquery, no additional predicate.
- *     TODO (GLENN) 5) Explicit LEFT OUTER JOIN query using UNNEST subquery, no additional predicate.
+ *     5) Explicit LEFT OUTER JOIN query using UNNEST subquery, no additional predicate.
  */
 
 DROP DATAVERSE TestYelp IF EXISTS;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-3/use-case-3.9.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-3/use-case-3.9.query.sqlpp
new file mode 100644
index 0000000..27eab43
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-3/use-case-3.9.query.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.
+ */
+
+SET `compiler.arrayindex` "true";
+USE TestYelp;
+
+FROM     YelpCheckinDateMarkers M
+LEFT OUTER JOIN (
+    FROM    YelpCheckin C, C.checkin_times D
+    SELECT  VALUE D.date
+)        AS CD ON CD /* +indexnl */ = M.date
+SELECT   COUNT(*);
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-4/use-case-4.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-4/use-case-4.1.ddl.sqlpp
index 41d36e9..100cbdd 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-4/use-case-4.1.ddl.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-4/use-case-4.1.ddl.sqlpp
@@ -23,7 +23,7 @@
  *     2) INNER JOIN query, with additional predicate on inner collection before the first unnest and before the final unnest.
  *     3) INNER JOIN query, with additional predicate on the outer collection.
  *     4) Explicit INNER JOIN query using UNNEST subquery, no additional predicate.
- *     TODO (GLENN) 5) Explicit LEFT OUTER JOIN query using UNNEST subquery, no additional predicate.
+ *     5) Explicit LEFT OUTER JOIN query using UNNEST subquery, no additional predicate.
  */
 
 DROP DATAVERSE TestYelp IF EXISTS;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-4/use-case-4.9.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-4/use-case-4.9.query.sqlpp
new file mode 100644
index 0000000..58ba46a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/use-case-4/use-case-4.9.query.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.
+ */
+
+SET `compiler.arrayindex` "true";
+USE TestYelp;
+
+FROM     YelpCheckinDateMarkers M
+LEFT OUTER JOIN (
+    FROM    YelpCheckin C, C.checkin_times CT, CT.dates D 
+    SELECT  VALUE D
+)        AS CD ON CD /* +indexnl */ = M.date
+SELECT   COUNT(*);
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/with-open-index/with-open-index.1.ddl.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/with-open-index/with-open-index.1.ddl.sqlpp
index 039df8c..6a74203 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/with-open-index/with-open-index.1.ddl.sqlpp
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/with-open-index/with-open-index.1.ddl.sqlpp
@@ -22,7 +22,7 @@
  *     1) Implicit INNER JOIN query, with additional predicate on inner collection before the unnest.
  *     2) Implicit INNER JOIN query, with additional predicate on the outer collection.
  *     3) Explicit INNER JOIN query using UNNEST subquery, no additional predicate.
- *     TODO (GLENN) 4) Explicit LEFT OUTER JOIN query using UNNEST subquery, no additional predicate.
+ *     4) Explicit LEFT OUTER JOIN query using UNNEST subquery, no additional predicate.
  */
 
 DROP DATAVERSE TestYelp IF EXISTS;
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/with-open-index/with-open-index.8.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/with-open-index/with-open-index.8.query.sqlpp
new file mode 100644
index 0000000..7bfe568
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/array-index/join-unnest-queries/with-open-index/with-open-index.8.query.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.
+ */
+
+SET `compiler.arrayindex` "true";
+USE TestYelp;
+
+FROM     YelpCheckinDateMarkers M
+LEFT OUTER JOIN (
+    FROM    YelpCheckin C, C.dates CD
+    SELECT  VALUE CD
+)        AS D ON D /*+ indexnl */ = M.datetime
+SELECT   COUNT(*);
+
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/use-case-1.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/use-case-1.1.adm
similarity index 100%
rename from asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/use-case-1.1.adm
rename to asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/use-case-1.1.adm
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/use-case-1.2.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/use-case-1.2.adm
similarity index 100%
rename from asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/use-case-1.2.adm
rename to asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/use-case-1.2.adm
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/use-case-1.3.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/use-case-1.3.adm
similarity index 100%
rename from asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/use-case-1.3.adm
rename to asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/use-case-1.3.adm
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/use-case-1.4.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/use-case-1.4.adm
new file mode 100644
index 0000000..694c9d6
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/use-case-1.4.adm
@@ -0,0 +1 @@
+{ "$1": 107 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-2/use-case-2.4.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-2/use-case-2.4.adm
new file mode 100644
index 0000000..694c9d6
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-2/use-case-2.4.adm
@@ -0,0 +1 @@
+{ "$1": 107 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-3/use-case-3.5.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-3/use-case-3.5.adm
new file mode 100644
index 0000000..e593a03
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-3/use-case-3.5.adm
@@ -0,0 +1 @@
+{ "$1": 125 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-4/use-case-4.5.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-4/use-case-4.5.adm
new file mode 100644
index 0000000..e593a03
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-4/use-case-4.5.adm
@@ -0,0 +1 @@
+{ "$1": 125 }
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/with-open-index.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/with-open-index.1.adm
similarity index 100%
rename from asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/with-open-index.1.adm
rename to asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/with-open-index.1.adm
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/with-open-index.2.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/with-open-index.2.adm
similarity index 100%
rename from asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/with-open-index.2.adm
rename to asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/with-open-index.2.adm
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/with-open-index.3.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/with-open-index.3.adm
similarity index 100%
rename from asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/use-case-1/with-open-index.3.adm
rename to asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/with-open-index.3.adm
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/with-open-index.4.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/with-open-index.4.adm
new file mode 100644
index 0000000..694c9d6
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/array-index/join-unnest-queries/with-open-index/with-open-index.4.adm
@@ -0,0 +1 @@
+{ "$1": 107 }