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From prasan...@apache.org
Subject [30/37] hive git commit: HIVE-14877: Move slow CliDriver tests to MiniLlap (Prasanth Jayachandran reviewed by Siddharth Seth)
Date Wed, 12 Oct 2016 07:27:43 GMT
http://git-wip-us.apache.org/repos/asf/hive/blob/1f258e96/ql/src/test/results/clientpositive/llap/correlationoptimizer2.q.out
----------------------------------------------------------------------
diff --git a/ql/src/test/results/clientpositive/llap/correlationoptimizer2.q.out b/ql/src/test/results/clientpositive/llap/correlationoptimizer2.q.out
new file mode 100644
index 0000000..dfb4804
--- /dev/null
+++ b/ql/src/test/results/clientpositive/llap/correlationoptimizer2.q.out
@@ -0,0 +1,2130 @@
+PREHOOK: query: -- In this query, subquery a and b both have a GroupByOperator and the a and b will be
+-- joined. The key of JoinOperator is the same with both keys of GroupByOperators in subquery
+-- a and b. When Correlation Optimizer is turned off, we have four MR jobs.
+-- When Correlation Optimizer is turned on, 2 MR jobs will be generated.
+-- The first job will evaluate subquery tmp (including subquery a, b, and the JoinOperator on a
+-- and b).
+EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+POSTHOOK: query: -- In this query, subquery a and b both have a GroupByOperator and the a and b will be
+-- joined. The key of JoinOperator is the same with both keys of GroupByOperators in subquery
+-- a and b. When Correlation Optimizer is turned off, we have four MR jobs.
+-- When Correlation Optimizer is turned on, 2 MR jobs will be generated.
+-- The first job will evaluate subquery tmp (including subquery a, b, and the JoinOperator on a
+-- and b).
+EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+#### A masked pattern was here ####
+      Edges:
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE), Reducer 6 (SIMPLE_EDGE)
+        Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
+        Reducer 6 <- Map 5 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: x
+                  Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Map 5 
+            Map Operator Tree:
+                TableScan
+                  alias: y
+                  Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+        Reducer 3 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Merge Join Operator
+                condition map:
+                     Inner Join 0 to 1
+                keys:
+                  0 _col0 (type: string)
+                  1 _col0 (type: string)
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 12 Data size: 2268 Basic stats: COMPLETE Column stats: COMPLETE
+                Select Operator
+                  expressions: hash(_col0) (type: int), hash(_col1) (type: int), hash(_col2) (type: int), hash(_col3) (type: int)
+                  outputColumnNames: _col0, _col1, _col2, _col3
+                  Statistics: Num rows: 12 Data size: 2268 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: sum(_col0), sum(_col1), sum(_col2), sum(_col3)
+                    mode: hash
+                    outputColumnNames: _col0, _col1, _col2, _col3
+                    Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col0 (type: bigint), _col1 (type: bigint), _col2 (type: bigint), _col3 (type: bigint)
+        Reducer 4 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: sum(VALUE._col0), sum(VALUE._col1), sum(VALUE._col2), sum(VALUE._col3)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                  table:
+                      input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 6 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Input: default@src1
+#### A masked pattern was here ####
+POSTHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Input: default@src1
+#### A masked pattern was here ####
+652447	37	652447	15
+PREHOOK: query: EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+POSTHOOK: query: EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+#### A masked pattern was here ####
+      Edges:
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE), Reducer 6 (SIMPLE_EDGE)
+        Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
+        Reducer 6 <- Map 5 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: x
+                  Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Map 5 
+            Map Operator Tree:
+                TableScan
+                  alias: y
+                  Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+        Reducer 3 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Merge Join Operator
+                condition map:
+                     Inner Join 0 to 1
+                keys:
+                  0 _col0 (type: string)
+                  1 _col0 (type: string)
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 12 Data size: 2268 Basic stats: COMPLETE Column stats: COMPLETE
+                Select Operator
+                  expressions: hash(_col0) (type: int), hash(_col1) (type: int), hash(_col2) (type: int), hash(_col3) (type: int)
+                  outputColumnNames: _col0, _col1, _col2, _col3
+                  Statistics: Num rows: 12 Data size: 2268 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: sum(_col0), sum(_col1), sum(_col2), sum(_col3)
+                    mode: hash
+                    outputColumnNames: _col0, _col1, _col2, _col3
+                    Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col0 (type: bigint), _col1 (type: bigint), _col2 (type: bigint), _col3 (type: bigint)
+        Reducer 4 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: sum(VALUE._col0), sum(VALUE._col1), sum(VALUE._col2), sum(VALUE._col3)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                  table:
+                      input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 6 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Input: default@src1
+#### A masked pattern was here ####
+POSTHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Input: default@src1
+#### A masked pattern was here ####
+652447	37	652447	15
+PREHOOK: query: -- Left Outer Join should be handled.
+EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      LEFT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+POSTHOOK: query: -- Left Outer Join should be handled.
+EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      LEFT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+#### A masked pattern was here ####
+      Edges:
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE), Reducer 6 (SIMPLE_EDGE)
+        Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
+        Reducer 6 <- Map 5 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: x
+                  Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string), value (type: string)
+                    outputColumnNames: key, value
+                    Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Map 5 
+            Map Operator Tree:
+                TableScan
+                  alias: y
+                  Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: count(value)
+                    keys: key (type: string)
+                    mode: hash
+                    outputColumnNames: _col0, _col1
+                    Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      key expressions: _col0 (type: string)
+                      sort order: +
+                      Map-reduce partition columns: _col0 (type: string)
+                      Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+        Reducer 3 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Merge Join Operator
+                condition map:
+                     Left Outer Join0 to 1
+                keys:
+                  0 _col0 (type: string)
+                  1 _col0 (type: string)
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 205 Data size: 38745 Basic stats: COMPLETE Column stats: COMPLETE
+                Select Operator
+                  expressions: hash(_col0) (type: int), hash(_col1) (type: int), hash(_col2) (type: int), hash(_col3) (type: int)
+                  outputColumnNames: _col0, _col1, _col2, _col3
+                  Statistics: Num rows: 205 Data size: 38745 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: sum(_col0), sum(_col1), sum(_col2), sum(_col3)
+                    mode: hash
+                    outputColumnNames: _col0, _col1, _col2, _col3
+                    Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col0 (type: bigint), _col1 (type: bigint), _col2 (type: bigint), _col3 (type: bigint)
+        Reducer 4 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: sum(VALUE._col0), sum(VALUE._col1), sum(VALUE._col2), sum(VALUE._col3)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                  table:
+                      input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 6 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      LEFT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Input: default@src1
+#### A masked pattern was here ####
+POSTHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      LEFT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Input: default@src1
+#### A masked pattern was here ####
+12744278	500	652447	15
+PREHOOK: query: EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      LEFT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+POSTHOOK: query: EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      LEFT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+#### A masked pattern was here ####
+      Edges:
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE), Reducer 6 (SIMPLE_EDGE)
+        Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
+        Reducer 6 <- Map 5 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: x
+                  Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string), value (type: string)
+                    outputColumnNames: key, value
+                    Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Map 5 
+            Map Operator Tree:
+                TableScan
+                  alias: y
+                  Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: count(value)
+                    keys: key (type: string)
+                    mode: hash
+                    outputColumnNames: _col0, _col1
+                    Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      key expressions: _col0 (type: string)
+                      sort order: +
+                      Map-reduce partition columns: _col0 (type: string)
+                      Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+        Reducer 3 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Merge Join Operator
+                condition map:
+                     Left Outer Join0 to 1
+                keys:
+                  0 _col0 (type: string)
+                  1 _col0 (type: string)
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 205 Data size: 38745 Basic stats: COMPLETE Column stats: COMPLETE
+                Select Operator
+                  expressions: hash(_col0) (type: int), hash(_col1) (type: int), hash(_col2) (type: int), hash(_col3) (type: int)
+                  outputColumnNames: _col0, _col1, _col2, _col3
+                  Statistics: Num rows: 205 Data size: 38745 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: sum(_col0), sum(_col1), sum(_col2), sum(_col3)
+                    mode: hash
+                    outputColumnNames: _col0, _col1, _col2, _col3
+                    Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col0 (type: bigint), _col1 (type: bigint), _col2 (type: bigint), _col3 (type: bigint)
+        Reducer 4 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: sum(VALUE._col0), sum(VALUE._col1), sum(VALUE._col2), sum(VALUE._col3)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                  table:
+                      input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 6 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      LEFT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Input: default@src1
+#### A masked pattern was here ####
+POSTHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      LEFT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Input: default@src1
+#### A masked pattern was here ####
+12744278	500	652447	15
+PREHOOK: query: -- Right Outer Join should be handled.
+EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      RIGHT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+POSTHOOK: query: -- Right Outer Join should be handled.
+EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      RIGHT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+#### A masked pattern was here ####
+      Edges:
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE), Reducer 6 (SIMPLE_EDGE)
+        Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
+        Reducer 6 <- Map 5 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: x
+                  Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: count(value)
+                    keys: key (type: string)
+                    mode: hash
+                    outputColumnNames: _col0, _col1
+                    Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      key expressions: _col0 (type: string)
+                      sort order: +
+                      Map-reduce partition columns: _col0 (type: string)
+                      Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Map 5 
+            Map Operator Tree:
+                TableScan
+                  alias: y
+                  Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string), value (type: string)
+                    outputColumnNames: key, value
+                    Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+        Reducer 3 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Merge Join Operator
+                condition map:
+                     Right Outer Join0 to 1
+                keys:
+                  0 _col0 (type: string)
+                  1 _col0 (type: string)
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 12 Data size: 2268 Basic stats: COMPLETE Column stats: COMPLETE
+                Select Operator
+                  expressions: hash(_col0) (type: int), hash(_col1) (type: int), hash(_col2) (type: int), hash(_col3) (type: int)
+                  outputColumnNames: _col0, _col1, _col2, _col3
+                  Statistics: Num rows: 12 Data size: 2268 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: sum(_col0), sum(_col1), sum(_col2), sum(_col3)
+                    mode: hash
+                    outputColumnNames: _col0, _col1, _col2, _col3
+                    Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col0 (type: bigint), _col1 (type: bigint), _col2 (type: bigint), _col3 (type: bigint)
+        Reducer 4 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: sum(VALUE._col0), sum(VALUE._col1), sum(VALUE._col2), sum(VALUE._col3)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                  table:
+                      input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 6 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      RIGHT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Input: default@src1
+#### A masked pattern was here ####
+POSTHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      RIGHT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Input: default@src1
+#### A masked pattern was here ####
+652447	37	652447	25
+PREHOOK: query: EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      RIGHT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+POSTHOOK: query: EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      RIGHT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+#### A masked pattern was here ####
+      Edges:
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE), Reducer 6 (SIMPLE_EDGE)
+        Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
+        Reducer 6 <- Map 5 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: x
+                  Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: count(value)
+                    keys: key (type: string)
+                    mode: hash
+                    outputColumnNames: _col0, _col1
+                    Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      key expressions: _col0 (type: string)
+                      sort order: +
+                      Map-reduce partition columns: _col0 (type: string)
+                      Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Map 5 
+            Map Operator Tree:
+                TableScan
+                  alias: y
+                  Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string), value (type: string)
+                    outputColumnNames: key, value
+                    Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+        Reducer 3 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Merge Join Operator
+                condition map:
+                     Right Outer Join0 to 1
+                keys:
+                  0 _col0 (type: string)
+                  1 _col0 (type: string)
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 12 Data size: 2268 Basic stats: COMPLETE Column stats: COMPLETE
+                Select Operator
+                  expressions: hash(_col0) (type: int), hash(_col1) (type: int), hash(_col2) (type: int), hash(_col3) (type: int)
+                  outputColumnNames: _col0, _col1, _col2, _col3
+                  Statistics: Num rows: 12 Data size: 2268 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: sum(_col0), sum(_col1), sum(_col2), sum(_col3)
+                    mode: hash
+                    outputColumnNames: _col0, _col1, _col2, _col3
+                    Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col0 (type: bigint), _col1 (type: bigint), _col2 (type: bigint), _col3 (type: bigint)
+        Reducer 4 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: sum(VALUE._col0), sum(VALUE._col1), sum(VALUE._col2), sum(VALUE._col3)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                  table:
+                      input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 6 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      RIGHT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Input: default@src1
+#### A masked pattern was here ####
+POSTHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      RIGHT OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Input: default@src1
+#### A masked pattern was here ####
+652447	37	652447	25
+PREHOOK: query: -- Full Outer Join should be handled.
+EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+POSTHOOK: query: -- Full Outer Join should be handled.
+EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+#### A masked pattern was here ####
+      Edges:
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE), Reducer 6 (SIMPLE_EDGE)
+        Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
+        Reducer 6 <- Map 5 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: x
+                  Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string), value (type: string)
+                    outputColumnNames: key, value
+                    Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Map 5 
+            Map Operator Tree:
+                TableScan
+                  alias: y
+                  Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string), value (type: string)
+                    outputColumnNames: key, value
+                    Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+        Reducer 3 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Merge Join Operator
+                condition map:
+                     Outer Join 0 to 1
+                keys:
+                  0 _col0 (type: string)
+                  1 _col0 (type: string)
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 217 Data size: 41013 Basic stats: COMPLETE Column stats: COMPLETE
+                Select Operator
+                  expressions: hash(_col0) (type: int), hash(_col1) (type: int), hash(_col2) (type: int), hash(_col3) (type: int)
+                  outputColumnNames: _col0, _col1, _col2, _col3
+                  Statistics: Num rows: 217 Data size: 41013 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: sum(_col0), sum(_col1), sum(_col2), sum(_col3)
+                    mode: hash
+                    outputColumnNames: _col0, _col1, _col2, _col3
+                    Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col0 (type: bigint), _col1 (type: bigint), _col2 (type: bigint), _col3 (type: bigint)
+        Reducer 4 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: sum(VALUE._col0), sum(VALUE._col1), sum(VALUE._col2), sum(VALUE._col3)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                  table:
+                      input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 6 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Input: default@src1
+#### A masked pattern was here ####
+POSTHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Input: default@src1
+#### A masked pattern was here ####
+12744278	500	652447	25
+PREHOOK: query: EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+POSTHOOK: query: EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+#### A masked pattern was here ####
+      Edges:
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE), Reducer 6 (SIMPLE_EDGE)
+        Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
+        Reducer 6 <- Map 5 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: x
+                  Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string), value (type: string)
+                    outputColumnNames: key, value
+                    Statistics: Num rows: 500 Data size: 89000 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Map 5 
+            Map Operator Tree:
+                TableScan
+                  alias: y
+                  Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string), value (type: string)
+                    outputColumnNames: key, value
+                    Statistics: Num rows: 25 Data size: 4375 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      aggregations: count(value)
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0, _col1
+                      Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                        value expressions: _col1 (type: bigint)
+            Execution mode: llap
+            LLAP IO: no inputs
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 205 Data size: 19475 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+        Reducer 3 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Merge Join Operator
+                condition map:
+                     Outer Join 0 to 1
+                keys:
+                  0 _col0 (type: string)
+                  1 _col0 (type: string)
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 217 Data size: 41013 Basic stats: COMPLETE Column stats: COMPLETE
+                Select Operator
+                  expressions: hash(_col0) (type: int), hash(_col1) (type: int), hash(_col2) (type: int), hash(_col3) (type: int)
+                  outputColumnNames: _col0, _col1, _col2, _col3
+                  Statistics: Num rows: 217 Data size: 41013 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: sum(_col0), sum(_col1), sum(_col2), sum(_col3)
+                    mode: hash
+                    outputColumnNames: _col0, _col1, _col2, _col3
+                    Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col0 (type: bigint), _col1 (type: bigint), _col2 (type: bigint), _col3 (type: bigint)
+        Reducer 4 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: sum(VALUE._col0), sum(VALUE._col1), sum(VALUE._col2), sum(VALUE._col3)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1, _col2, _col3
+                Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 32 Basic stats: COMPLETE Column stats: COMPLETE
+                  table:
+                      input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 6 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 12 Data size: 1128 Basic stats: COMPLETE Column stats: COMPLETE
+                  value expressions: _col1 (type: bigint)
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Input: default@src1
+#### A masked pattern was here ####
+POSTHOOK: query: SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS key1, a.cnt AS cnt1, b.key AS key2, b.cnt AS cnt2
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)) tmp
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Input: default@src1
+#### A masked pattern was here ####
+12744278	500	652447	25
+PREHOOK: query: EXPLAIN
+SELECT SUM(HASH(tmp.key)), SUM(HASH(tmp.cnt))
+FROM (SELECT a.key AS key, count(1) AS cnt
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)
+      GROUP BY a.key) tmp
+PREHOOK: type: QUERY
+POSTHOOK: query: EXPLAIN
+SELECT SUM(HASH(tmp.key)), SUM(HASH(tmp.cnt))
+FROM (SELECT a.key AS key, count(1) AS cnt
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)
+      GROUP BY a.key) tmp
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+#### A masked pattern was here ####
+      Edges:
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE), Reducer 7 (SIMPLE_EDGE)
+        Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
+        Reducer 5 <- Reducer 4 (SIMPLE_EDGE)
+        Reducer 7 <- Map 6 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: x
+                  Statistics: Num rows: 500 Data size: 43500 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string)
+                    outputColumnNames: key
+                    Statistics: Num rows: 500 Data size: 43500 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 205 Data size: 17835 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 205 Data size: 17835 Basic stats: COMPLETE Column stats: COMPLETE
+            Execution mode: llap
+            LLAP IO: no inputs
+        Map 6 
+            Map Operator Tree:
+                TableScan
+                  alias: y
+                  Statistics: Num rows: 25 Data size: 2150 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string)
+                    outputColumnNames: key
+                    Statistics: Num rows: 25 Data size: 2150 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 12 Data size: 1032 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 12 Data size: 1032 Basic stats: COMPLETE Column stats: COMPLETE
+            Execution mode: llap
+            LLAP IO: no inputs
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 205 Data size: 17835 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 205 Data size: 17835 Basic stats: COMPLETE Column stats: COMPLETE
+        Reducer 3 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Merge Join Operator
+                condition map:
+                     Outer Join 0 to 1
+                keys:
+                  0 _col0 (type: string)
+                  1 _col0 (type: string)
+                outputColumnNames: _col0
+                Statistics: Num rows: 217 Data size: 18879 Basic stats: COMPLETE Column stats: COMPLETE
+                Group By Operator
+                  aggregations: count(1)
+                  keys: _col0 (type: string)
+                  mode: hash
+                  outputColumnNames: _col0, _col1
+                  Statistics: Num rows: 14 Data size: 1330 Basic stats: COMPLETE Column stats: COMPLETE
+                  Reduce Output Operator
+                    key expressions: _col0 (type: string)
+                    sort order: +
+                    Map-reduce partition columns: _col0 (type: string)
+                    Statistics: Num rows: 14 Data size: 1330 Basic stats: COMPLETE Column stats: COMPLETE
+                    value expressions: _col1 (type: bigint)
+        Reducer 4 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 14 Data size: 1330 Basic stats: COMPLETE Column stats: COMPLETE
+                Select Operator
+                  expressions: hash(_col0) (type: int), hash(_col1) (type: int)
+                  outputColumnNames: _col0, _col1
+                  Statistics: Num rows: 14 Data size: 1330 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: sum(_col0), sum(_col1)
+                    mode: hash
+                    outputColumnNames: _col0, _col1
+                    Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col0 (type: bigint), _col1 (type: bigint)
+        Reducer 5 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: sum(VALUE._col0), sum(VALUE._col1)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: COMPLETE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: COMPLETE
+                  table:
+                      input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 7 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 12 Data size: 1032 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 12 Data size: 1032 Basic stats: COMPLETE Column stats: COMPLETE
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: SELECT SUM(HASH(tmp.key)), SUM(HASH(tmp.cnt))
+FROM (SELECT a.key AS key, count(1) AS cnt
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)
+      GROUP BY a.key) tmp
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Input: default@src1
+#### A masked pattern was here ####
+POSTHOOK: query: SELECT SUM(HASH(tmp.key)), SUM(HASH(tmp.cnt))
+FROM (SELECT a.key AS key, count(1) AS cnt
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)
+      GROUP BY a.key) tmp
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Input: default@src1
+#### A masked pattern was here ####
+12744278	310
+PREHOOK: query: -- After FULL OUTER JOIN, keys with null values are not grouped, right now,
+-- we have to generate 2 MR jobs for tmp, 1 MR job for a join b and another for the
+-- GroupByOperator on key.
+EXPLAIN
+SELECT SUM(HASH(tmp.key)), SUM(HASH(tmp.cnt))
+FROM (SELECT a.key AS key, count(1) AS cnt
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)
+      GROUP BY a.key) tmp
+PREHOOK: type: QUERY
+POSTHOOK: query: -- After FULL OUTER JOIN, keys with null values are not grouped, right now,
+-- we have to generate 2 MR jobs for tmp, 1 MR job for a join b and another for the
+-- GroupByOperator on key.
+EXPLAIN
+SELECT SUM(HASH(tmp.key)), SUM(HASH(tmp.cnt))
+FROM (SELECT a.key AS key, count(1) AS cnt
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)
+      GROUP BY a.key) tmp
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+#### A masked pattern was here ####
+      Edges:
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE), Reducer 7 (SIMPLE_EDGE)
+        Reducer 4 <- Reducer 3 (SIMPLE_EDGE)
+        Reducer 5 <- Reducer 4 (SIMPLE_EDGE)
+        Reducer 7 <- Map 6 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: x
+                  Statistics: Num rows: 500 Data size: 43500 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string)
+                    outputColumnNames: key
+                    Statistics: Num rows: 500 Data size: 43500 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 205 Data size: 17835 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 205 Data size: 17835 Basic stats: COMPLETE Column stats: COMPLETE
+            Execution mode: llap
+            LLAP IO: no inputs
+        Map 6 
+            Map Operator Tree:
+                TableScan
+                  alias: y
+                  Statistics: Num rows: 25 Data size: 2150 Basic stats: COMPLETE Column stats: COMPLETE
+                  Select Operator
+                    expressions: key (type: string)
+                    outputColumnNames: key
+                    Statistics: Num rows: 25 Data size: 2150 Basic stats: COMPLETE Column stats: COMPLETE
+                    Group By Operator
+                      keys: key (type: string)
+                      mode: hash
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 12 Data size: 1032 Basic stats: COMPLETE Column stats: COMPLETE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: string)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: string)
+                        Statistics: Num rows: 12 Data size: 1032 Basic stats: COMPLETE Column stats: COMPLETE
+            Execution mode: llap
+            LLAP IO: no inputs
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 205 Data size: 17835 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 205 Data size: 17835 Basic stats: COMPLETE Column stats: COMPLETE
+        Reducer 3 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Merge Join Operator
+                condition map:
+                     Outer Join 0 to 1
+                keys:
+                  0 _col0 (type: string)
+                  1 _col0 (type: string)
+                outputColumnNames: _col0
+                Statistics: Num rows: 217 Data size: 18879 Basic stats: COMPLETE Column stats: COMPLETE
+                Group By Operator
+                  aggregations: count(1)
+                  keys: _col0 (type: string)
+                  mode: hash
+                  outputColumnNames: _col0, _col1
+                  Statistics: Num rows: 14 Data size: 1330 Basic stats: COMPLETE Column stats: COMPLETE
+                  Reduce Output Operator
+                    key expressions: _col0 (type: string)
+                    sort order: +
+                    Map-reduce partition columns: _col0 (type: string)
+                    Statistics: Num rows: 14 Data size: 1330 Basic stats: COMPLETE Column stats: COMPLETE
+                    value expressions: _col1 (type: bigint)
+        Reducer 4 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 14 Data size: 1330 Basic stats: COMPLETE Column stats: COMPLETE
+                Select Operator
+                  expressions: hash(_col0) (type: int), hash(_col1) (type: int)
+                  outputColumnNames: _col0, _col1
+                  Statistics: Num rows: 14 Data size: 1330 Basic stats: COMPLETE Column stats: COMPLETE
+                  Group By Operator
+                    aggregations: sum(_col0), sum(_col1)
+                    mode: hash
+                    outputColumnNames: _col0, _col1
+                    Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: COMPLETE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: COMPLETE
+                      value expressions: _col0 (type: bigint), _col1 (type: bigint)
+        Reducer 5 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: sum(VALUE._col0), sum(VALUE._col1)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: COMPLETE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: COMPLETE
+                  table:
+                      input format: org.apache.hadoop.mapred.SequenceFileInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 7 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                keys: KEY._col0 (type: string)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 12 Data size: 1032 Basic stats: COMPLETE Column stats: COMPLETE
+                Reduce Output Operator
+                  key expressions: _col0 (type: string)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: string)
+                  Statistics: Num rows: 12 Data size: 1032 Basic stats: COMPLETE Column stats: COMPLETE
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: SELECT SUM(HASH(tmp.key)), SUM(HASH(tmp.cnt))
+FROM (SELECT a.key AS key, count(1) AS cnt
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)
+      GROUP BY a.key) tmp
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Input: default@src1
+#### A masked pattern was here ####
+POSTHOOK: query: SELECT SUM(HASH(tmp.key)), SUM(HASH(tmp.cnt))
+FROM (SELECT a.key AS key, count(1) AS cnt
+      FROM (SELECT x.key as key, count(x.value) AS cnt FROM src x group by x.key) a
+      FULL OUTER JOIN (SELECT y.key as key, count(y.value) AS cnt FROM src1 y group by y.key) b
+      ON (a.key = b.key)
+      GROUP BY a.key) tmp
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Input: default@src1
+#### A masked pattern was here ####
+12744278	310
+PREHOOK: query: -- When Correlation Optimizer is turned off, we need 4 MR jobs.
+-- When Correlation Optimizer is turned on, the subquery of tmp will be evaluated in
+-- a single MR job (including the subquery a, the subquery b, and a join b). So, we
+-- will have 2 MR jobs.
+EXPLAIN
+SELECT SUM(HASH(key1)), SUM(HASH(cnt1)), SUM(HASH(key2)), SUM(HASH(cnt2))
+FROM (SELECT a.key AS k

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