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From prasan...@apache.org
Subject [40/51] [partial] hive git commit: HIVE-11776: LLAP: Generate golden files for all MiniLlapCluster tests (Prasanth Jayachandran)
Date Tue, 15 Sep 2015 20:42:46 GMT
http://git-wip-us.apache.org/repos/asf/hive/blob/ace87818/ql/src/test/results/clientpositive/llap/auto_sortmerge_join_9.q.out
----------------------------------------------------------------------
diff --git a/ql/src/test/results/clientpositive/llap/auto_sortmerge_join_9.q.out b/ql/src/test/results/clientpositive/llap/auto_sortmerge_join_9.q.out
new file mode 100644
index 0000000..5459914
--- /dev/null
+++ b/ql/src/test/results/clientpositive/llap/auto_sortmerge_join_9.q.out
@@ -0,0 +1,3521 @@
+PREHOOK: query: -- SORT_QUERY_RESULTS
+
+CREATE TABLE tbl1(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS
+PREHOOK: type: CREATETABLE
+PREHOOK: Output: database:default
+PREHOOK: Output: default@tbl1
+POSTHOOK: query: -- SORT_QUERY_RESULTS
+
+CREATE TABLE tbl1(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS
+POSTHOOK: type: CREATETABLE
+POSTHOOK: Output: database:default
+POSTHOOK: Output: default@tbl1
+PREHOOK: query: CREATE TABLE tbl2(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS
+PREHOOK: type: CREATETABLE
+PREHOOK: Output: database:default
+PREHOOK: Output: default@tbl2
+POSTHOOK: query: CREATE TABLE tbl2(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS
+POSTHOOK: type: CREATETABLE
+POSTHOOK: Output: database:default
+POSTHOOK: Output: default@tbl2
+PREHOOK: query: insert overwrite table tbl1
+select * from src where key < 10
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Output: default@tbl1
+POSTHOOK: query: insert overwrite table tbl1
+select * from src where key < 10
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Output: default@tbl1
+POSTHOOK: Lineage: tbl1.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl1.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+PREHOOK: query: insert overwrite table tbl2
+select * from src where key < 10
+PREHOOK: type: QUERY
+PREHOOK: Input: default@src
+PREHOOK: Output: default@tbl2
+POSTHOOK: query: insert overwrite table tbl2
+select * from src where key < 10
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@src
+POSTHOOK: Output: default@tbl2
+POSTHOOK: Lineage: tbl2.key EXPRESSION [(src)src.FieldSchema(name:key, type:string, comment:default), ]
+POSTHOOK: Lineage: tbl2.value SIMPLE [(src)src.FieldSchema(name:value, type:string, comment:default), ]
+PREHOOK: query: -- The join is being performed as part of sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from (
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The join is being performed as part of sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from (
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 3 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 key (type: int)
+                        1 key (type: int)
+                      input vertices:
+                        1 Map 3
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        mode: hash
+                        outputColumnNames: _col0
+                        Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          sort order: 
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Map 3 
+            Map Operator Tree:
+                TableScan
+                  alias: b
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from (
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from (
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+22
+PREHOOK: query: -- The join is being performed as part of sub-query. It should be converted to a sort-merge join
+explain
+select key, count(*) from 
+(
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The join is being performed as part of sub-query. It should be converted to a sort-merge join
+explain
+select key, count(*) from 
+(
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 3 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 key (type: int)
+                        1 key (type: int)
+                      outputColumnNames: _col0
+                      input vertices:
+                        1 Map 3
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        keys: _col0 (type: int)
+                        mode: hash
+                        outputColumnNames: _col0, _col1
+                        Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col1 (type: bigint)
+            Execution mode: llap
+        Map 3 
+            Map Operator Tree:
+                TableScan
+                  alias: b
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: int)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 2 Data size: 15 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 2 Data size: 15 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select key, count(*) from 
+(
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select key, count(*) from 
+(
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+0	9
+2	1
+4	1
+5	9
+8	1
+9	1
+PREHOOK: query: -- The join is being performed as part of more than one sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from
+(
+  select key, count(*) from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq1
+  group by key
+) subq2
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The join is being performed as part of more than one sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from
+(
+  select key, count(*) from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq1
+  group by key
+) subq2
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 4 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 key (type: int)
+                        1 key (type: int)
+                      outputColumnNames: _col0
+                      input vertices:
+                        1 Map 4
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        keys: _col0 (type: int)
+                        mode: hash
+                        outputColumnNames: _col0, _col1
+                        Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col1 (type: bigint)
+            Execution mode: llap
+        Map 4 
+            Map Operator Tree:
+                TableScan
+                  alias: b
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: int)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 2 Data size: 15 Basic stats: COMPLETE Column stats: NONE
+                Select Operator
+                  Statistics: Num rows: 2 Data size: 15 Basic stats: COMPLETE Column stats: NONE
+                  Group By Operator
+                    aggregations: count()
+                    mode: hash
+                    outputColumnNames: _col0
+                    Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: NONE
+                    Reduce Output Operator
+                      sort order: 
+                      Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: NONE
+                      value expressions: _col0 (type: bigint)
+        Reducer 3 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 16 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from
+(
+  select key, count(*) from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq1
+  group by key
+) subq2
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from
+(
+  select key, count(*) from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq1
+  group by key
+) subq2
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+6
+PREHOOK: query: -- A join is being performed across different sub-queries, where a join is being performed in each of them.
+-- Each sub-query should be converted to a sort-merge join.
+explain
+select src1.key, src1.cnt1, src2.cnt1 from
+(
+  select key, count(*) as cnt1 from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq1 group by key
+) src1
+join
+(
+  select key, count(*) as cnt1 from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq2 group by key
+) src2
+on src1.key = src2.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- A join is being performed across different sub-queries, where a join is being performed in each of them.
+-- Each sub-query should be converted to a sort-merge join.
+explain
+select src1.key, src1.cnt1, src2.cnt1 from
+(
+  select key, count(*) as cnt1 from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq1 group by key
+) src1
+join
+(
+  select key, count(*) as cnt1 from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq2 group by key
+) src2
+on src1.key = src2.key
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 3 (BROADCAST_EDGE)
+        Map 4 <- Map 6 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE), Reducer 5 (BROADCAST_EDGE)
+        Reducer 5 <- Map 4 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 key (type: int)
+                        1 key (type: int)
+                      outputColumnNames: _col0
+                      input vertices:
+                        1 Map 3
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        keys: _col0 (type: int)
+                        mode: hash
+                        outputColumnNames: _col0, _col1
+                        Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col1 (type: bigint)
+            Execution mode: llap
+        Map 3 
+            Map Operator Tree:
+                TableScan
+                  alias: b
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Map 4 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 key (type: int)
+                        1 key (type: int)
+                      outputColumnNames: _col0
+                      input vertices:
+                        1 Map 6
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        keys: _col0 (type: int)
+                        mode: hash
+                        outputColumnNames: _col0, _col1
+                        Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col1 (type: bigint)
+            Execution mode: llap
+        Map 6 
+            Map Operator Tree:
+                TableScan
+                  alias: b
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: int)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 2 Data size: 15 Basic stats: COMPLETE Column stats: NONE
+                Map Join Operator
+                  condition map:
+                       Inner Join 0 to 1
+                  keys:
+                    0 _col0 (type: int)
+                    1 _col0 (type: int)
+                  outputColumnNames: _col0, _col1, _col3
+                  input vertices:
+                    1 Reducer 5
+                  Statistics: Num rows: 2 Data size: 16 Basic stats: COMPLETE Column stats: NONE
+                  HybridGraceHashJoin: true
+                  Select Operator
+                    expressions: _col0 (type: int), _col1 (type: bigint), _col3 (type: bigint)
+                    outputColumnNames: _col0, _col1, _col2
+                    Statistics: Num rows: 2 Data size: 16 Basic stats: COMPLETE Column stats: NONE
+                    File Output Operator
+                      compressed: false
+                      Statistics: Num rows: 2 Data size: 16 Basic stats: COMPLETE Column stats: NONE
+                      table:
+                          input format: org.apache.hadoop.mapred.TextInputFormat
+                          output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                          serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+        Reducer 5 
+            Execution mode: llap
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: int)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 2 Data size: 15 Basic stats: COMPLETE Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int)
+                  sort order: +
+                  Map-reduce partition columns: _col0 (type: int)
+                  Statistics: Num rows: 2 Data size: 15 Basic stats: COMPLETE Column stats: NONE
+                  value expressions: _col1 (type: bigint)
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select src1.key, src1.cnt1, src2.cnt1 from
+(
+  select key, count(*) as cnt1 from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq1 group by key
+) src1
+join
+(
+  select key, count(*) as cnt1 from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq2 group by key
+) src2
+on src1.key = src2.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select src1.key, src1.cnt1, src2.cnt1 from
+(
+  select key, count(*) as cnt1 from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq1 group by key
+) src1
+join
+(
+  select key, count(*) as cnt1 from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq2 group by key
+) src2
+on src1.key = src2.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+0	9	9
+2	1	1
+4	1	1
+5	9	9
+8	1	1
+9	1	1
+PREHOOK: query: -- The subquery itself is being joined. Since the sub-query only contains selects and filters, it should 
+-- be converted to a sort-merge join.
+explain
+select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+  on subq1.key = subq2.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The subquery itself is being joined. Since the sub-query only contains selects and filters, it should 
+-- be converted to a sort-merge join.
+explain
+select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+  on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 3 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (key < 6) (type: boolean)
+                    Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                      Map Join Operator
+                        condition map:
+                             Inner Join 0 to 1
+                        keys:
+                          0 _col0 (type: int)
+                          1 _col0 (type: int)
+                        input vertices:
+                          1 Map 3
+                        Statistics: Num rows: 3 Data size: 23 Basic stats: COMPLETE Column stats: NONE
+                        HybridGraceHashJoin: true
+                        Group By Operator
+                          aggregations: count()
+                          mode: hash
+                          outputColumnNames: _col0
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          Reduce Output Operator
+                            sort order: 
+                            Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                            value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Map 3 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (key < 6) (type: boolean)
+                    Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+  on subq1.key = subq2.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+  on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+20
+PREHOOK: query: -- The subquery itself is being joined. Since the sub-query only contains selects and filters, it should 
+-- be converted to a sort-merge join, although there is more than one level of sub-query
+explain
+select count(*) from 
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1 
+  where key < 6
+  ) subq2
+  join tbl2 b
+  on subq2.key = b.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The subquery itself is being joined. Since the sub-query only contains selects and filters, it should 
+-- be converted to a sort-merge join, although there is more than one level of sub-query
+explain
+select count(*) from 
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1 
+  where key < 6
+  ) subq2
+  join tbl2 b
+  on subq2.key = b.key
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 2 <- Map 1 (BROADCAST_EDGE)
+        Reducer 3 <- Map 2 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (((key < 8) and (key < 6)) and key is not null) (type: boolean)
+                    Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Map 2 
+            Map Operator Tree:
+                TableScan
+                  alias: b
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 _col0 (type: int)
+                        1 key (type: int)
+                      input vertices:
+                        0 Map 1
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        mode: hash
+                        outputColumnNames: _col0
+                        Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          sort order: 
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Reducer 3 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from 
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1 
+  where key < 6
+  ) subq2
+  join tbl2 b
+  on subq2.key = b.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from 
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1 
+  where key < 6
+  ) subq2
+  join tbl2 b
+  on subq2.key = b.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+20
+PREHOOK: query: -- Both the tables are nested sub-queries i.e more then 1 level of sub-query.
+-- The join should be converted to a sort-merge join
+explain
+select count(*) from 
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1 
+  where key < 6
+  ) subq2
+  join
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq3 
+  where key < 6
+  ) subq4
+  on subq2.key = subq4.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- Both the tables are nested sub-queries i.e more then 1 level of sub-query.
+-- The join should be converted to a sort-merge join
+explain
+select count(*) from 
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1 
+  where key < 6
+  ) subq2
+  join
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq3 
+  where key < 6
+  ) subq4
+  on subq2.key = subq4.key
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 3 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (((key < 8) and (key < 6)) and key is not null) (type: boolean)
+                    Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+                      Map Join Operator
+                        condition map:
+                             Inner Join 0 to 1
+                        keys:
+                          0 _col0 (type: int)
+                          1 _col0 (type: int)
+                        input vertices:
+                          1 Map 3
+                        Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+                        HybridGraceHashJoin: true
+                        Group By Operator
+                          aggregations: count()
+                          mode: hash
+                          outputColumnNames: _col0
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          Reduce Output Operator
+                            sort order: 
+                            Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                            value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Map 3 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (((key < 8) and (key < 6)) and key is not null) (type: boolean)
+                    Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from 
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1 
+  where key < 6
+  ) subq2
+  join
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq3 
+  where key < 6
+  ) subq4
+  on subq2.key = subq4.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from 
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1 
+  where key < 6
+  ) subq2
+  join
+  (
+  select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq3 
+  where key < 6
+  ) subq4
+  on subq2.key = subq4.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+#### A masked pattern was here ####
+20
+PREHOOK: query: -- The subquery itself is being joined. Since the sub-query only contains selects and filters and the join key
+-- is not getting modified, it should be converted to a sort-merge join. Note that the sub-query modifies one 
+-- item, but that is not part of the join key.
+explain
+select count(*) from 
+  (select a.key as key, concat(a.value, a.value) as value from tbl1 a where key < 8) subq1 
+    join
+  (select a.key as key, concat(a.value, a.value) as value from tbl2 a where key < 8) subq2
+  on subq1.key = subq2.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The subquery itself is being joined. Since the sub-query only contains selects and filters and the join key
+-- is not getting modified, it should be converted to a sort-merge join. Note that the sub-query modifies one 
+-- item, but that is not part of the join key.
+explain
+select count(*) from 
+  (select a.key as key, concat(a.value, a.value) as value from tbl1 a where key < 8) subq1 
+    join
+  (select a.key as key, concat(a.value, a.value) as value from tbl2 a where key < 8) subq2
+  on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 3 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (key < 8) (type: boolean)
+                    Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                      Map Join Operator
+                        condition map:
+                             Inner Join 0 to 1
+                        keys:
+                          0 _col0 (type: int)
+                          1 _col0 (type: int)
+                        input vertices:
+                          1 Map 3
+                        Statistics: Num rows: 3 Data size: 23 Basic stats: COMPLETE Column stats: NONE
+                        HybridGraceHashJoin: true
+                        Group By Operator
+                          aggregations: count()
+                          mode: hash
+                          outputColumnNames: _col0
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          Reduce Output Operator
+                            sort order: 
+                            Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                            value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Map 3 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (key < 8) (type: boolean)
+                    Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from 
+  (select a.key as key, concat(a.value, a.value) as value from tbl1 a where key < 8) subq1 
+    join
+  (select a.key as key, concat(a.value, a.value) as value from tbl2 a where key < 8) subq2
+  on subq1.key = subq2.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from 
+  (select a.key as key, concat(a.value, a.value) as value from tbl1 a where key < 8) subq1 
+    join
+  (select a.key as key, concat(a.value, a.value) as value from tbl2 a where key < 8) subq2
+  on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+20
+PREHOOK: query: -- Since the join key is modified by the sub-query, neither sort-merge join not bucketized mapside
+-- join should be performed
+explain
+select count(*) from 
+  (select a.key +1 as key, concat(a.value, a.value) as value from tbl1 a) subq1 
+    join
+  (select a.key +1 as key, concat(a.value, a.value) as value from tbl2 a) subq2
+  on subq1.key = subq2.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- Since the join key is modified by the sub-query, neither sort-merge join not bucketized mapside
+-- join should be performed
+explain
+select count(*) from 
+  (select a.key +1 as key, concat(a.value, a.value) as value from tbl1 a) subq1 
+    join
+  (select a.key +1 as key, concat(a.value, a.value) as value from tbl2 a) subq2
+  on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 3 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Select Operator
+                    expressions: (key + 1) (type: int)
+                    outputColumnNames: _col0
+                    Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                    Filter Operator
+                      predicate: _col0 is not null (type: boolean)
+                      Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                      Map Join Operator
+                        condition map:
+                             Inner Join 0 to 1
+                        keys:
+                          0 _col0 (type: int)
+                          1 _col0 (type: int)
+                        input vertices:
+                          1 Map 3
+                        Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                        HybridGraceHashJoin: true
+                        Group By Operator
+                          aggregations: count()
+                          mode: hash
+                          outputColumnNames: _col0
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          Reduce Output Operator
+                            sort order: 
+                            Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                            value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Map 3 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Select Operator
+                    expressions: (key + 1) (type: int)
+                    outputColumnNames: _col0
+                    Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                    Filter Operator
+                      predicate: _col0 is not null (type: boolean)
+                      Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from 
+  (select a.key +1 as key, concat(a.value, a.value) as value from tbl1 a) subq1 
+    join
+  (select a.key +1 as key, concat(a.value, a.value) as value from tbl2 a) subq2
+  on subq1.key = subq2.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from 
+  (select a.key +1 as key, concat(a.value, a.value) as value from tbl1 a) subq1 
+    join
+  (select a.key +1 as key, concat(a.value, a.value) as value from tbl2 a) subq2
+  on subq1.key = subq2.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+22
+PREHOOK: query: -- The left table is a sub-query and the right table is not.
+-- It should be converted to a sort-merge join.
+explain
+select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join tbl2 a on subq1.key = a.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The left table is a sub-query and the right table is not.
+-- It should be converted to a sort-merge join.
+explain
+select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join tbl2 a on subq1.key = a.key
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 2 <- Map 1 (BROADCAST_EDGE)
+        Reducer 3 <- Map 2 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (key < 6) (type: boolean)
+                    Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Map 2 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 _col0 (type: int)
+                        1 key (type: int)
+                      input vertices:
+                        0 Map 1
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        mode: hash
+                        outputColumnNames: _col0
+                        Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          sort order: 
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Reducer 3 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join tbl2 a on subq1.key = a.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join tbl2 a on subq1.key = a.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+20
+PREHOOK: query: -- The right table is a sub-query and the left table is not.
+-- It should be converted to a sort-merge join.
+explain
+select count(*) from tbl1 a
+  join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq1 
+  on a.key = subq1.key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The right table is a sub-query and the left table is not.
+-- It should be converted to a sort-merge join.
+explain
+select count(*) from tbl1 a
+  join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq1 
+  on a.key = subq1.key
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 2 <- Map 1 (BROADCAST_EDGE)
+        Reducer 3 <- Map 2 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (key < 6) (type: boolean)
+                    Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Map 2 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 key (type: int)
+                        1 _col0 (type: int)
+                      input vertices:
+                        1 Map 1
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        mode: hash
+                        outputColumnNames: _col0
+                        Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          sort order: 
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Reducer 3 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from tbl1 a
+  join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq1 
+  on a.key = subq1.key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from tbl1 a
+  join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq1 
+  on a.key = subq1.key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+20
+PREHOOK: query: -- There are more than 2 inputs to the join, all of them being sub-queries. 
+-- It should be converted to to a sort-merge join
+explain
+select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+  on (subq1.key = subq2.key)
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq3
+  on (subq1.key = subq3.key)
+PREHOOK: type: QUERY
+POSTHOOK: query: -- There are more than 2 inputs to the join, all of them being sub-queries. 
+-- It should be converted to to a sort-merge join
+explain
+select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+  on (subq1.key = subq2.key)
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq3
+  on (subq1.key = subq3.key)
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 3 (BROADCAST_EDGE), Map 4 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (key < 6) (type: boolean)
+                    Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                      Map Join Operator
+                        condition map:
+                             Inner Join 0 to 1
+                             Inner Join 0 to 2
+                        keys:
+                          0 _col0 (type: int)
+                          1 _col0 (type: int)
+                          2 _col0 (type: int)
+                        input vertices:
+                          1 Map 3
+                          2 Map 4
+                        Statistics: Num rows: 6 Data size: 46 Basic stats: COMPLETE Column stats: NONE
+                        HybridGraceHashJoin: true
+                        Group By Operator
+                          aggregations: count()
+                          mode: hash
+                          outputColumnNames: _col0
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          Reduce Output Operator
+                            sort order: 
+                            Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                            value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Map 3 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (key < 6) (type: boolean)
+                    Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Map 4 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (key < 6) (type: boolean)
+                    Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 3 Data size: 21 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+  on subq1.key = subq2.key
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq3
+  on (subq1.key = subq3.key)
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from 
+  (select a.key as key, a.value as value from tbl1 a where key < 6) subq1 
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq2
+  on subq1.key = subq2.key
+    join
+  (select a.key as key, a.value as value from tbl2 a where key < 6) subq3
+  on (subq1.key = subq3.key)
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+56
+PREHOOK: query: -- The join is being performed on a nested sub-query, and an aggregation is performed after that.
+-- The join should be converted to a sort-merge join
+explain
+select count(*) from (
+  select subq2.key as key, subq2.value as value1, b.value as value2 from
+  (
+    select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1
+    where key < 6
+  ) subq2
+join tbl2 b
+on subq2.key = b.key) a
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The join is being performed on a nested sub-query, and an aggregation is performed after that.
+-- The join should be converted to a sort-merge join
+explain
+select count(*) from (
+  select subq2.key as key, subq2.value as value1, b.value as value2 from
+  (
+    select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1
+    where key < 6
+  ) subq2
+join tbl2 b
+on subq2.key = b.key) a
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 2 <- Map 1 (BROADCAST_EDGE)
+        Reducer 3 <- Map 2 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (((key < 8) and (key < 6)) and key is not null) (type: boolean)
+                    Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+                    Select Operator
+                      expressions: key (type: int)
+                      outputColumnNames: _col0
+                      Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 1 Data size: 7 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Map 2 
+            Map Operator Tree:
+                TableScan
+                  alias: b
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 _col0 (type: int)
+                        1 key (type: int)
+                      input vertices:
+                        0 Map 1
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        mode: hash
+                        outputColumnNames: _col0
+                        Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          sort order: 
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Reducer 3 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from (
+  select subq2.key as key, subq2.value as value1, b.value as value2 from
+  (
+    select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1
+    where key < 6
+  ) subq2
+join tbl2 b
+on subq2.key = b.key) a
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from (
+  select subq2.key as key, subq2.value as value1, b.value as value2 from
+  (
+    select * from
+    (
+      select a.key as key, a.value as value from tbl1 a where key < 8
+    ) subq1
+    where key < 6
+  ) subq2
+join tbl2 b
+on subq2.key = b.key) a
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+20
+PREHOOK: query: -- The join is being performed as part of sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from (
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The join is being performed as part of sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from (
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 3 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 key (type: int)
+                        1 key (type: int)
+                      input vertices:
+                        1 Map 3
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        mode: hash
+                        outputColumnNames: _col0
+                        Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          sort order: 
+                          Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col0 (type: bigint)
+            Execution mode: llap
+        Map 3 
+            Map Operator Tree:
+                TableScan
+                  alias: b
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                mode: mergepartial
+                outputColumnNames: _col0
+                Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 1 Data size: 8 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select count(*) from (
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select count(*) from (
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+22
+PREHOOK: query: -- The join is being performed as part of sub-query. It should be converted to a sort-merge join
+explain
+select key, count(*) from 
+(
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The join is being performed as part of sub-query. It should be converted to a sort-merge join
+explain
+select key, count(*) from 
+(
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 3 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 key (type: int)
+                        1 key (type: int)
+                      outputColumnNames: _col0
+                      input vertices:
+                        1 Map 3
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        keys: _col0 (type: int)
+                        mode: hash
+                        outputColumnNames: _col0, _col1
+                        Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                          value expressions: _col1 (type: bigint)
+            Execution mode: llap
+        Map 3 
+            Map Operator Tree:
+                TableScan
+                  alias: b
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+            Execution mode: llap
+        Reducer 2 
+            Execution mode: uber
+            Reduce Operator Tree:
+              Group By Operator
+                aggregations: count(VALUE._col0)
+                keys: KEY._col0 (type: int)
+                mode: mergepartial
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 2 Data size: 15 Basic stats: COMPLETE Column stats: NONE
+                File Output Operator
+                  compressed: false
+                  Statistics: Num rows: 2 Data size: 15 Basic stats: COMPLETE Column stats: NONE
+                  table:
+                      input format: org.apache.hadoop.mapred.TextInputFormat
+                      output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat
+                      serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+
+  Stage: Stage-0
+    Fetch Operator
+      limit: -1
+      Processor Tree:
+        ListSink
+
+PREHOOK: query: select key, count(*) from 
+(
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+PREHOOK: type: QUERY
+PREHOOK: Input: default@tbl1
+PREHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+POSTHOOK: query: select key, count(*) from 
+(
+  select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+) subq1
+group by key
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@tbl1
+POSTHOOK: Input: default@tbl2
+#### A masked pattern was here ####
+0	9
+2	1
+4	1
+5	9
+8	1
+9	1
+PREHOOK: query: -- The join is being performed as part of more than one sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from
+(
+  select key, count(*) from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq1
+  group by key
+) subq2
+PREHOOK: type: QUERY
+POSTHOOK: query: -- The join is being performed as part of more than one sub-query. It should be converted to a sort-merge join
+explain
+select count(*) from
+(
+  select key, count(*) from 
+  (
+    select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key = b.key
+  ) subq1
+  group by key
+) subq2
+POSTHOOK: type: QUERY
+STAGE DEPENDENCIES:
+  Stage-1 is a root stage
+  Stage-0 depends on stages: Stage-1
+
+STAGE PLANS:
+  Stage: Stage-1
+    Tez
+      Edges:
+        Map 1 <- Map 4 (BROADCAST_EDGE)
+        Reducer 2 <- Map 1 (SIMPLE_EDGE)
+        Reducer 3 <- Reducer 2 (SIMPLE_EDGE)
+#### A masked pattern was here ####
+      Vertices:
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 10 Data size: 70 Basic stats: COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 5 Data size: 35 Basic stats: COMPLETE Column stats: NONE
+                    Map Join Operator
+                      condition map:
+                           Inner Join 0 to 1
+                      keys:
+                        0 key (type: int)
+                        1 key (type: int)
+                      outputColumnNames: _col0
+                      input vertices:
+                        1 Map 4
+                      Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                      HybridGraceHashJoin: true
+                      Group By Operator
+                        aggregations: count()
+                        keys: _col0 (type: int)
+                        mode: hash
+                        outputColumnNames: _col0, _col1
+                        Statistics: Num rows: 5 Data size: 38 Basic stats: COMPLETE Column stats: NONE
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statist

<TRUNCATED>

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