Modified: 
hive/branches/spark/ql/src/test/results/clientpositive/spark/semijoin.q.out
URL: 
http://svn.apache.org/viewvc/hive/branches/spark/ql/src/test/results/clientpositive/spark/semijoin.q.out?rev=1642997&r1=1642996&r2=1642997&view=diff
==============================================================================
--- hive/branches/spark/ql/src/test/results/clientpositive/spark/semijoin.q.out 
(original)
+++ hive/branches/spark/ql/src/test/results/clientpositive/spark/semijoin.q.out 
Tue Dec  2 19:57:10 2014
@@ -119,16 +119,32 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select * from t1 a left semi join t2 b on a.key=b.key 
sort by a.key, a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 6 Data size: 43 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: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -145,51 +161,27 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key} {value}
-                            1 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
-                  Filter Operator
-                    predicate: key is not null (type: boolean)
-                    Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {key} {value}
-                        1 
-                      keys:
-                        0 key (type: int)
-                        1 _col0 (type: int)
-                      outputColumnNames: _col0, _col1
-                      input vertices:
-                        1 Map 3
-                      Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-                      Reduce Output Operator
-                        key expressions: _col0 (type: int), _col1 (type: 
string)
-                        sort order: ++
-                        Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {KEY.reducesinkkey0} {VALUE._col0}
+                  1 
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 6 Data size: 47 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int), _col1 (type: string)
+                  sort order: ++
+                  Statistics: Num rows: 6 Data size: 47 Basic stats: COMPLETE 
Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int), 
KEY.reducesinkkey1 (type: string)
                 outputColumnNames: _col0, _col1
@@ -229,16 +221,32 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select * from t2 a left semi join t1 b on b.key=a.key 
sort by a.key, a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 11 Data size: 84 Basic stats: COMPLETE 
Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 6 Data size: 45 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: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -255,51 +263,27 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key} {value}
-                            1 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 11 Data size: 84 Basic stats: COMPLETE 
Column stats: NONE
-                  Filter Operator
-                    predicate: key is not null (type: boolean)
-                    Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {key} {value}
-                        1 
-                      keys:
-                        0 key (type: int)
-                        1 _col0 (type: int)
-                      outputColumnNames: _col0, _col1
-                      input vertices:
-                        1 Map 3
-                      Statistics: Num rows: 6 Data size: 49 Basic stats: 
COMPLETE Column stats: NONE
-                      Reduce Output Operator
-                        key expressions: _col0 (type: int), _col1 (type: 
string)
-                        sort order: ++
-                        Statistics: Num rows: 6 Data size: 49 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {KEY.reducesinkkey0} {VALUE._col0}
+                  1 
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 6 Data size: 49 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int), _col1 (type: string)
+                  sort order: ++
+                  Statistics: Num rows: 6 Data size: 49 Basic stats: COMPLETE 
Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int), 
KEY.reducesinkkey1 (type: string)
                 outputColumnNames: _col0, _col1
@@ -341,16 +325,32 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select * from t1 a left semi join t4 b on b.key=a.key 
sort by a.key, a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 6 Data size: 43 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: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -367,51 +367,27 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 0 Data size: 0 Basic stats: NONE 
Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key} {value}
-                            1 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
-                  Filter Operator
-                    predicate: key is not null (type: boolean)
-                    Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {key} {value}
-                        1 
-                      keys:
-                        0 key (type: int)
-                        1 _col0 (type: int)
-                      outputColumnNames: _col0, _col1
-                      input vertices:
-                        1 Map 3
-                      Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-                      Reduce Output Operator
-                        key expressions: _col0 (type: int), _col1 (type: 
string)
-                        sort order: ++
-                        Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 0 Data size: 0 Basic stats: 
NONE Column stats: NONE
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {KEY.reducesinkkey0} {VALUE._col0}
+                  1 
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 6 Data size: 47 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int), _col1 (type: string)
+                  sort order: ++
+                  Statistics: Num rows: 6 Data size: 47 Basic stats: COMPLETE 
Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int), 
KEY.reducesinkkey1 (type: string)
                 outputColumnNames: _col0, _col1
@@ -445,16 +421,32 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select a.value from t1 a left semi join t3 b on 
(b.key = a.key and b.key < '15') sort by a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 6 Data size: 43 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: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -467,55 +459,31 @@ STAGE PLANS:
                       mode: hash
                       outputColumnNames: _col0, _col1
                       Statistics: Num rows: 7 Data size: 51 Basic stats: 
COMPLETE Column stats: NONE
-                      Spark HashTable Sink Operator
-                        condition expressions:
-                          0 {value}
-                          1 
-                        keys:
-                          0 key (type: int)
-                          1 _col1 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
-                  Filter Operator
-                    predicate: key is not null (type: boolean)
-                    Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {value}
-                        1 
-                      keys:
-                        0 key (type: int)
-                        1 _col1 (type: int)
-                      outputColumnNames: _col1
-                      input vertices:
-                        1 Map 3
-                      Statistics: Num rows: 7 Data size: 56 Basic stats: 
COMPLETE Column stats: NONE
-                      Select Operator
-                        expressions: _col1 (type: string)
-                        outputColumnNames: _col0
-                        Statistics: Num rows: 7 Data size: 56 Basic stats: 
COMPLETE Column stats: NONE
-                        Reduce Output Operator
-                          key expressions: _col0 (type: string)
-                          sort order: +
-                          Statistics: Num rows: 7 Data size: 56 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                      Reduce Output Operator
+                        key expressions: _col1 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col1 (type: int)
+                        Statistics: Num rows: 7 Data size: 51 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {VALUE._col0}
+                  1 
+                outputColumnNames: _col1
+                Statistics: Num rows: 7 Data size: 56 Basic stats: COMPLETE 
Column stats: NONE
+                Select Operator
+                  expressions: _col1 (type: string)
+                  outputColumnNames: _col0
+                  Statistics: Num rows: 7 Data size: 56 Basic stats: COMPLETE 
Column stats: NONE
+                  Reduce Output Operator
+                    key expressions: _col0 (type: string)
+                    sort order: +
+                    Statistics: Num rows: 7 Data size: 56 Basic stats: 
COMPLETE Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: string)
                 outputColumnNames: _col0
@@ -560,16 +528,32 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select * from t1 a left semi join t2 b on a.key = 
b.key and b.value < "val_10" sort by a.key, a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 6 Data size: 43 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: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -586,51 +570,27 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0, _col1
                         Statistics: Num rows: 2 Data size: 15 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key} {value}
-                            1 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
-                  Filter Operator
-                    predicate: key is not null (type: boolean)
-                    Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {key} {value}
-                        1 
-                      keys:
-                        0 key (type: int)
-                        1 _col0 (type: int)
-                      outputColumnNames: _col0, _col1
-                      input vertices:
-                        1 Map 3
-                      Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-                      Reduce Output Operator
-                        key expressions: _col0 (type: int), _col1 (type: 
string)
-                        sort order: ++
-                        Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                        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
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {KEY.reducesinkkey0} {VALUE._col0}
+                  1 
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 6 Data size: 47 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int), _col1 (type: string)
+                  sort order: ++
+                  Statistics: Num rows: 6 Data size: 47 Basic stats: COMPLETE 
Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int), 
KEY.reducesinkkey1 (type: string)
                 outputColumnNames: _col0, _col1
@@ -667,13 +627,15 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select a.value from t1 a left semi join (select key 
from t3 where key > 5) b on a.key = b.key sort by a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
         Map 1 
@@ -693,23 +655,12 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 7 Data size: 51 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {value}
-                            1 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 3 <- Map 2 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 2 
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 7 Data size: 51 Basic stats: 
COMPLETE Column stats: NONE
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: a
@@ -717,29 +668,30 @@ STAGE PLANS:
                   Filter Operator
                     predicate: key is not null (type: boolean)
                     Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {value}
-                        1 
-                      keys:
-                        0 key (type: int)
-                        1 _col0 (type: int)
-                      outputColumnNames: _col1
-                      input vertices:
-                        1 Map 1
-                      Statistics: Num rows: 7 Data size: 56 Basic stats: 
COMPLETE Column stats: NONE
-                      Select Operator
-                        expressions: _col1 (type: string)
-                        outputColumnNames: _col0
-                        Statistics: Num rows: 7 Data size: 56 Basic stats: 
COMPLETE Column stats: NONE
-                        Reduce Output Operator
-                          key expressions: _col0 (type: string)
-                          sort order: +
-                          Statistics: Num rows: 7 Data size: 56 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Reducer 2 
+            Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {VALUE._col0}
+                  1 
+                outputColumnNames: _col1
+                Statistics: Num rows: 7 Data size: 56 Basic stats: COMPLETE 
Column stats: NONE
+                Select Operator
+                  expressions: _col1 (type: string)
+                  outputColumnNames: _col0
+                  Statistics: Num rows: 7 Data size: 56 Basic stats: COMPLETE 
Column stats: NONE
+                  Reduce Output Operator
+                    key expressions: _col0 (type: string)
+                    sort order: +
+                    Statistics: Num rows: 7 Data size: 56 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 3 
             Reduce Operator Tree:
               Select Operator
@@ -778,13 +730,15 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select a.value from t1 a left semi join (select key , 
value from t2 where key > 5) b on a.key = b.key and b.value <= 'val_20' sort by 
a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
         Map 1 
@@ -804,23 +758,12 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0, _col1
                         Statistics: Num rows: 1 Data size: 7 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {value}
-                            1 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 3 <- Map 2 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 2 
+                        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
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: a
@@ -828,29 +771,30 @@ STAGE PLANS:
                   Filter Operator
                     predicate: key is not null (type: boolean)
                     Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {value}
-                        1 
-                      keys:
-                        0 key (type: int)
-                        1 _col0 (type: int)
-                      outputColumnNames: _col1
-                      input vertices:
-                        1 Map 1
-                      Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-                      Select Operator
-                        expressions: _col1 (type: string)
-                        outputColumnNames: _col0
-                        Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-                        Reduce Output Operator
-                          key expressions: _col0 (type: string)
-                          sort order: +
-                          Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Reducer 2 
+            Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {VALUE._col0}
+                  1 
+                outputColumnNames: _col1
+                Statistics: Num rows: 6 Data size: 47 Basic stats: COMPLETE 
Column stats: NONE
+                Select Operator
+                  expressions: _col1 (type: string)
+                  outputColumnNames: _col0
+                  Statistics: Num rows: 6 Data size: 47 Basic stats: COMPLETE 
Column stats: NONE
+                  Reduce Output Operator
+                    key expressions: _col0 (type: string)
+                    sort order: +
+                    Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 3 
             Reduce Operator Tree:
               Select Operator
@@ -886,13 +830,15 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select * from t2 a left semi join (select key , value 
from t1 where key > 2) b on a.key = b.key sort by a.key, a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
         Map 1 
@@ -912,23 +858,12 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 3 Data size: 21 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key} {value}
-                            1 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 3 <- Map 2 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 2 
+                        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
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: a
@@ -936,25 +871,26 @@ STAGE PLANS:
                   Filter Operator
                     predicate: key is not null (type: boolean)
                     Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {key} {value}
-                        1 
-                      keys:
-                        0 key (type: int)
-                        1 _col0 (type: int)
-                      outputColumnNames: _col0, _col1
-                      input vertices:
-                        1 Map 1
-                      Statistics: Num rows: 6 Data size: 49 Basic stats: 
COMPLETE Column stats: NONE
-                      Reduce Output Operator
-                        key expressions: _col0 (type: int), _col1 (type: 
string)
-                        sort order: ++
-                        Statistics: Num rows: 6 Data size: 49 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Reducer 2 
+            Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {KEY.reducesinkkey0} {VALUE._col0}
+                  1 
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 6 Data size: 49 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int), _col1 (type: string)
+                  sort order: ++
+                  Statistics: Num rows: 6 Data size: 49 Basic stats: COMPLETE 
Column stats: NONE
         Reducer 3 
             Reduce Operator Tree:
               Select Operator
@@ -995,16 +931,31 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select /*+ mapjoin(b) */ a.key from t3 a left semi 
join t1 b on a.key = b.key sort by a.key
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 11 Data size: 81 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: 11 Data size: 81 Basic stats: 
COMPLETE Column stats: NONE
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -1021,51 +972,27 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key}
-                            1 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
-                  Filter Operator
-                    predicate: key is not null (type: boolean)
-                    Statistics: Num rows: 11 Data size: 81 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {key}
-                        1 
-                      keys:
-                        0 key (type: int)
-                        1 _col0 (type: int)
-                      outputColumnNames: _col0
-                      input vertices:
-                        1 Map 3
-                      Statistics: Num rows: 12 Data size: 89 Basic stats: 
COMPLETE Column stats: NONE
-                      Reduce Output Operator
-                        key expressions: _col0 (type: int)
-                        sort order: +
-                        Statistics: Num rows: 12 Data size: 89 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {KEY.reducesinkkey0}
+                  1 
+                outputColumnNames: _col0
+                Statistics: Num rows: 12 Data size: 89 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int)
+                  sort order: +
+                  Statistics: Num rows: 12 Data size: 89 Basic stats: COMPLETE 
Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int)
                 outputColumnNames: _col0
@@ -1118,16 +1045,32 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select * from t1 a left semi join t2 b on a.key = 
2*b.key sort by a.key, a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 6 Data size: 43 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: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -1144,51 +1087,27 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key} {value}
-                            1 
-                          keys:
-                            0 key (type: int)
-                            1 (2 * _col0) (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
-                  Filter Operator
-                    predicate: key is not null (type: boolean)
-                    Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {key} {value}
-                        1 
-                      keys:
-                        0 key (type: int)
-                        1 (2 * _col0) (type: int)
-                      outputColumnNames: _col0, _col1
-                      input vertices:
-                        1 Map 3
-                      Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-                      Reduce Output Operator
-                        key expressions: _col0 (type: int), _col1 (type: 
string)
-                        sort order: ++
-                        Statistics: Num rows: 6 Data size: 47 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                        Reduce Output Operator
+                          key expressions: (2 * _col0) (type: int)
+                          sort order: +
+                          Map-reduce partition columns: (2 * _col0) (type: int)
+                          Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {KEY.reducesinkkey0} {VALUE._col0}
+                  1 
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 6 Data size: 47 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int), _col1 (type: string)
+                  sort order: ++
+                  Statistics: Num rows: 6 Data size: 47 Basic stats: COMPLETE 
Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int), 
KEY.reducesinkkey1 (type: string)
                 outputColumnNames: _col0, _col1
@@ -1226,13 +1145,15 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select * from t1 a join t2 b on a.key = b.key left 
semi join t3 c on b.key = c.key sort by a.key, a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3), Map 5 (PARTITION-LEVEL SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
         Map 1 
@@ -1243,20 +1164,29 @@ STAGE PLANS:
                   Filter Operator
                     predicate: key is not null (type: boolean)
                     Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                    Spark HashTable Sink Operator
-                      condition expressions:
-                        0 {value}
-                        1 {key} {value}
-                        2 
-                      keys:
-                        0 key (type: int)
-                        1 key (type: int)
-                        2 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
+                    Reduce Output Operator
+                      key expressions: key (type: int)
+                      sort order: +
+                      Map-reduce partition columns: key (type: int)
+                      Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
         Map 4 
             Map Operator Tree:
                 TableScan
+                  alias: b
+                  Statistics: Num rows: 11 Data size: 84 Basic stats: COMPLETE 
Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 6 Data size: 45 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: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Map 5 
+            Map Operator Tree:
+                TableScan
                   alias: c
                   Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
                   Filter Operator
@@ -1271,60 +1201,32 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 11 Data size: 81 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key} {value}
-                            1 {key} {value}
-                            2 
-                          keys:
-                            0 key (type: int)
-                            1 key (type: int)
-                            2 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 3 <- Map 2 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 2 
-            Map Operator Tree:
-                TableScan
-                  alias: b
-                  Statistics: Num rows: 11 Data size: 84 Basic stats: COMPLETE 
Column stats: NONE
-                  Filter Operator
-                    predicate: key is not null (type: boolean)
-                    Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Inner Join 0 to 1
-                           Left Semi Join 1 to 2
-                      condition expressions:
-                        0 {key} {value}
-                        1 {key} {value}
-                        2 
-                      keys:
-                        0 key (type: int)
-                        1 key (type: int)
-                        2 _col0 (type: int)
-                      outputColumnNames: _col0, _col1, _col5, _col6
-                      input vertices:
-                        0 Map 1
-                        2 Map 4
-                      Statistics: Num rows: 24 Data size: 178 Basic stats: 
COMPLETE Column stats: NONE
-                      Select Operator
-                        expressions: _col0 (type: int), _col1 (type: string), 
_col5 (type: int), _col6 (type: string)
-                        outputColumnNames: _col0, _col1, _col2, _col3
-                        Statistics: Num rows: 24 Data size: 178 Basic stats: 
COMPLETE Column stats: NONE
                         Reduce Output Operator
-                          key expressions: _col0 (type: int), _col1 (type: 
string)
-                          sort order: ++
-                          Statistics: Num rows: 24 Data size: 178 Basic stats: 
COMPLETE Column stats: NONE
-                          value expressions: _col2 (type: int), _col3 (type: 
string)
-            Local Work:
-              Map Reduce Local Work
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 11 Data size: 81 Basic stats: 
COMPLETE Column stats: NONE
+        Reducer 2 
+            Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Inner Join 0 to 1
+                     Left Semi Join 1 to 2
+                condition expressions:
+                  0 {KEY.reducesinkkey0} {VALUE._col0}
+                  1 {KEY.reducesinkkey0} {VALUE._col0}
+                  2 
+                outputColumnNames: _col0, _col1, _col5, _col6
+                Statistics: Num rows: 24 Data size: 178 Basic stats: COMPLETE 
Column stats: NONE
+                Select Operator
+                  expressions: _col0 (type: int), _col1 (type: string), _col5 
(type: int), _col6 (type: string)
+                  outputColumnNames: _col0, _col1, _col2, _col3
+                  Statistics: Num rows: 24 Data size: 178 Basic stats: 
COMPLETE Column stats: NONE
+                  Reduce Output Operator
+                    key expressions: _col0 (type: int), _col1 (type: string)
+                    sort order: ++
+                    Statistics: Num rows: 24 Data size: 178 Basic stats: 
COMPLETE Column stats: NONE
+                    value expressions: _col2 (type: int), _col3 (type: string)
         Reducer 3 
             Reduce Operator Tree:
               Select Operator
@@ -1376,16 +1278,31 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select * from t3 a left semi join t1 b on a.key = 
b.key and a.value=b.value sort by a.key, a.value
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: (key is not null and value is not null) (type: 
boolean)
+                    Statistics: Num rows: 6 Data size: 44 Basic stats: 
COMPLETE Column stats: NONE
+                    Reduce Output Operator
+                      key expressions: key (type: int), value (type: string)
+                      sort order: ++
+                      Map-reduce partition columns: key (type: int), value 
(type: string)
+                      Statistics: Num rows: 6 Data size: 44 Basic stats: 
COMPLETE Column stats: NONE
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -1402,51 +1319,27 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0, _col1
                         Statistics: Num rows: 3 Data size: 21 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key} {value}
-                            1 
-                          keys:
-                            0 key (type: int), value (type: string)
-                            1 _col0 (type: int), _col1 (type: string)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
-                  Filter Operator
-                    predicate: (key is not null and value is not null) (type: 
boolean)
-                    Statistics: Num rows: 6 Data size: 44 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                      condition expressions:
-                        0 {key} {value}
-                        1 
-                      keys:
-                        0 key (type: int), value (type: string)
-                        1 _col0 (type: int), _col1 (type: string)
-                      outputColumnNames: _col0, _col1
-                      input vertices:
-                        1 Map 3
-                      Statistics: Num rows: 6 Data size: 48 Basic stats: 
COMPLETE Column stats: NONE
-                      Reduce Output Operator
-                        key expressions: _col0 (type: int), _col1 (type: 
string)
-                        sort order: ++
-                        Statistics: Num rows: 6 Data size: 48 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int), _col1 (type: 
string)
+                          sort order: ++
+                          Map-reduce partition columns: _col0 (type: int), 
_col1 (type: string)
+                          Statistics: Num rows: 3 Data size: 21 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                condition expressions:
+                  0 {KEY.reducesinkkey0} {KEY.reducesinkkey1}
+                  1 
+                outputColumnNames: _col0, _col1
+                Statistics: Num rows: 6 Data size: 48 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int), _col1 (type: string)
+                  sort order: ++
+                  Statistics: Num rows: 6 Data size: 48 Basic stats: COMPLETE 
Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int), 
KEY.reducesinkkey1 (type: string)
                 outputColumnNames: _col0, _col1
@@ -1494,16 +1387,31 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select /*+ mapjoin(b, c) */ a.key from t3 a left semi 
join t1 b on a.key = b.key left semi join t2 c on a.key = c.key sort by a.key
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3), Map 5 (PARTITION-LEVEL SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 11 Data size: 81 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: 11 Data size: 81 Basic stats: 
COMPLETE Column stats: NONE
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -1520,18 +1428,12 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key}
-                            1 
-                            2 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-                            2 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-        Map 4 
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 6 Data size: 43 Basic stats: 
COMPLETE Column stats: NONE
+        Map 5 
             Map Operator Tree:
                 TableScan
                   alias: c
@@ -1548,57 +1450,29 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key}
-                            1 
-                            2 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-                            2 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
-                  Filter Operator
-                    predicate: key is not null (type: boolean)
-                    Statistics: Num rows: 11 Data size: 81 Basic stats: 
COMPLETE Column stats: NONE
-                    Map Join Operator
-                      condition map:
-                           Left Semi Join 0 to 1
-                           Left Semi Join 0 to 2
-                      condition expressions:
-                        0 {key}
-                        1 
-                        2 
-                      keys:
-                        0 key (type: int)
-                        1 _col0 (type: int)
-                        2 _col0 (type: int)
-                      outputColumnNames: _col0
-                      input vertices:
-                        1 Map 3
-                        2 Map 4
-                      Statistics: Num rows: 24 Data size: 178 Basic stats: 
COMPLETE Column stats: NONE
-                      Reduce Output Operator
-                        key expressions: _col0 (type: int)
-                        sort order: +
-                        Statistics: Num rows: 24 Data size: 178 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                     Left Semi Join 0 to 2
+                condition expressions:
+                  0 {KEY.reducesinkkey0}
+                  1 
+                  2 
+                outputColumnNames: _col0
+                Statistics: Num rows: 24 Data size: 178 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int)
+                  sort order: +
+                  Statistics: Num rows: 24 Data size: 178 Basic stats: 
COMPLETE Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int)
                 outputColumnNames: _col0
@@ -1648,32 +1522,38 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select a.key from t3 a left outer join t1 b on a.key 
= b.key left semi join t2 c on b.key = c.key sort by a.key
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3), Map 5 (PARTITION-LEVEL SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 22 Data size: 163 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: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
                   Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
-                  Spark HashTable Sink Operator
-                    condition expressions:
-                      0 {key}
-                      1 
-                      2 
-                    keys:
-                      0 key (type: int)
-                      1 key (type: int)
-                      2 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-        Map 4 
+                  Reduce Output Operator
+                    key expressions: key (type: int)
+                    sort order: +
+                    Map-reduce partition columns: key (type: int)
+                    Statistics: Num rows: 11 Data size: 79 Basic stats: 
COMPLETE Column stats: NONE
+        Map 5 
             Map Operator Tree:
                 TableScan
                   alias: c
@@ -1687,54 +1567,29 @@ STAGE PLANS:
                       mode: hash
                       outputColumnNames: _col0
                       Statistics: Num rows: 11 Data size: 84 Basic stats: 
COMPLETE Column stats: NONE
-                      Spark HashTable Sink Operator
-                        condition expressions:
-                          0 {key}
-                          1 
-                          2 
-                        keys:
-                          0 key (type: int)
-                          1 key (type: int)
-                          2 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
-                  Map Join Operator
-                    condition map:
-                         Left Outer Join0 to 1
-                         Left Semi Join 1 to 2
-                    condition expressions:
-                      0 {key}
-                      1 
-                      2 
-                    keys:
-                      0 key (type: int)
-                      1 key (type: int)
-                      2 _col0 (type: int)
-                    outputColumnNames: _col0
-                    input vertices:
-                      1 Map 3
-                      2 Map 4
-                    Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
-                    Reduce Output Operator
-                      key expressions: _col0 (type: int)
-                      sort order: +
-                      Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 11 Data size: 84 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Outer Join0 to 1
+                     Left Semi Join 1 to 2
+                condition expressions:
+                  0 {KEY.reducesinkkey0}
+                  1 
+                  2 
+                outputColumnNames: _col0
+                Statistics: Num rows: 48 Data size: 358 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int)
+                  sort order: +
+                  Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int)
                 outputColumnNames: _col0
@@ -1796,32 +1651,38 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select a.key from t1 a right outer join t3 b on a.key 
= b.key left semi join t2 c on b.key = c.key sort by a.key
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3), Map 5 (PARTITION-LEVEL SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
         Map 1 
             Map Operator Tree:
                 TableScan
-                  alias: a
-                  Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
-                  Spark HashTable Sink Operator
-                    condition expressions:
-                      0 
-                      1 
-                      2 
-                    keys:
-                      0 key (type: int)
-                      1 key (type: int)
-                      2 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-        Map 4 
+                  alias: a
+                  Statistics: Num rows: 11 Data size: 79 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: 11 Data size: 79 Basic stats: 
COMPLETE Column stats: NONE
+        Map 4 
+            Map Operator Tree:
+                TableScan
+                  alias: b
+                  Statistics: Num rows: 22 Data size: 163 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: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
+        Map 5 
             Map Operator Tree:
                 TableScan
                   alias: c
@@ -1835,52 +1696,27 @@ STAGE PLANS:
                       mode: hash
                       outputColumnNames: _col0
                       Statistics: Num rows: 11 Data size: 84 Basic stats: 
COMPLETE Column stats: NONE
-                      Spark HashTable Sink Operator
-                        condition expressions:
-                          0 {key}
-                          1 
-                          2 
-                        keys:
-                          0 key (type: int)
-                          1 key (type: int)
-                          2 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 3 <- Map 2 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 2 
-            Map Operator Tree:
-                TableScan
-                  alias: b
-                  Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
-                  Map Join Operator
-                    condition map:
-                         Right Outer Join0 to 1
-                         Left Semi Join 1 to 2
-                    condition expressions:
-                      0 {key}
-                      1 
-                      2 
-                    keys:
-                      0 key (type: int)
-                      1 key (type: int)
-                      2 _col0 (type: int)
-                    outputColumnNames: _col0
-                    input vertices:
-                      0 Map 1
-                      2 Map 4
-                    Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
-                    Reduce Output Operator
-                      key expressions: _col0 (type: int)
-                      sort order: +
-                      Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 11 Data size: 84 Basic stats: 
COMPLETE Column stats: NONE
+        Reducer 2 
+            Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Right Outer Join0 to 1
+                     Left Semi Join 1 to 2
+                condition expressions:
+                  0 {KEY.reducesinkkey0}
+                  1 
+                  2 
+                outputColumnNames: _col0
+                Statistics: Num rows: 48 Data size: 358 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int)
+                  sort order: +
+                  Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 3 
             Reduce Operator Tree:
               Select Operator
@@ -2079,16 +1915,28 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select a.key from t3 a left semi join t2 b on a.key = 
b.key left outer join t1 c on a.key = c.key sort by a.key
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3), Map 5 (PARTITION-LEVEL SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 22 Data size: 163 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: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -2102,70 +1950,39 @@ STAGE PLANS:
                       mode: hash
                       outputColumnNames: _col0
                       Statistics: Num rows: 11 Data size: 84 Basic stats: 
COMPLETE Column stats: NONE
-                      Spark HashTable Sink Operator
-                        condition expressions:
-                          0 {key}
-                          1 
-                          2 
-                        keys:
-                          0 key (type: int)
-                          1 _col0 (type: int)
-                          2 key (type: int)
-            Local Work:
-              Map Reduce Local Work
-        Map 4 
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 11 Data size: 84 Basic stats: 
COMPLETE Column stats: NONE
+        Map 5 
             Map Operator Tree:
                 TableScan
                   alias: c
                   Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
-                  Spark HashTable Sink Operator
-                    condition expressions:
-                      0 {key}
-                      1 
-                      2 
-                    keys:
-                      0 key (type: int)
-                      1 _col0 (type: int)
-                      2 key (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a
-                  Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
-                  Map Join Operator
-                    condition map:
-                         Left Semi Join 0 to 1
-                         Left Outer Join0 to 2
-                    condition expressions:
-                      0 {key}
-                      1 
-                      2 
-                    keys:
-                      0 key (type: int)
-                      1 _col0 (type: int)
-                      2 key (type: int)
-                    outputColumnNames: _col0
-                    input vertices:
-                      1 Map 3
-                      2 Map 4
-                    Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
-                    Reduce Output Operator
-                      key expressions: _col0 (type: int)
-                      sort order: +
-                      Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
+                  Reduce Output Operator
+                    key expressions: key (type: int)
+                    sort order: +
+                    Map-reduce partition columns: key (type: int)
+                    Statistics: Num rows: 11 Data size: 79 Basic stats: 
COMPLETE Column stats: NONE
         Reducer 2 
             Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                     Left Outer Join0 to 2
+                condition expressions:
+                  0 {KEY.reducesinkkey0}
+                  1 
+                  2 
+                outputColumnNames: _col0
+                Statistics: Num rows: 48 Data size: 358 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int)
+                  sort order: +
+                  Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
+        Reducer 3 
+            Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int)
                 outputColumnNames: _col0
@@ -2230,13 +2047,15 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select a.key from t3 a left semi join t2 b on a.key = 
b.key right outer join t1 c on a.key = c.key sort by a.key
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 4 (PARTITION-LEVEL 
SORT, 3), Map 5 (PARTITION-LEVEL SORT, 3)
+        Reducer 3 <- Reducer 2 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
         Map 1 
@@ -2244,18 +2063,12 @@ STAGE PLANS:
                 TableScan
                   alias: a
                   Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
-                  Spark HashTable Sink Operator
-                    condition expressions:
-                      0 
-                      1 
-                      2 
-                    keys:
-                      0 key (type: int)
-                      1 _col0 (type: int)
-                      2 key (type: int)
-            Local Work:
-              Map Reduce Local Work
-        Map 2 
+                  Reduce Output Operator
+                    key expressions: key (type: int)
+                    sort order: +
+                    Map-reduce partition columns: key (type: int)
+                    Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
+        Map 4 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -2269,53 +2082,38 @@ STAGE PLANS:
                       mode: hash
                       outputColumnNames: _col0
                       Statistics: Num rows: 11 Data size: 84 Basic stats: 
COMPLETE Column stats: NONE
-                      Spark HashTable Sink Operator
-                        condition expressions:
-                          0 {key}
-                          1 
-                          2 
-                        keys:
-                          0 key (type: int)
-                          1 _col0 (type: int)
-                          2 key (type: int)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 4 <- Map 3 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 3 
+                      Reduce Output Operator
+                        key expressions: _col0 (type: int)
+                        sort order: +
+                        Map-reduce partition columns: _col0 (type: int)
+                        Statistics: Num rows: 11 Data size: 84 Basic stats: 
COMPLETE Column stats: NONE
+        Map 5 
             Map Operator Tree:
                 TableScan
                   alias: c
                   Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
-                  Map Join Operator
-                    condition map:
-                         Left Semi Join 0 to 1
-                         Right Outer Join0 to 2
-                    condition expressions:
-                      0 {key}
-                      1 
-                      2 
-                    keys:
-                      0 key (type: int)
-                      1 _col0 (type: int)
-                      2 key (type: int)
-                    outputColumnNames: _col0
-                    input vertices:
-                      0 Map 1
-                      1 Map 2
-                    Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
-                    Reduce Output Operator
-                      key expressions: _col0 (type: int)
-                      sort order: +
-                      Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
-            Local Work:
-              Map Reduce Local Work
-        Reducer 4 
+                  Reduce Output Operator
+                    key expressions: key (type: int)
+                    sort order: +
+                    Map-reduce partition columns: key (type: int)
+                    Statistics: Num rows: 11 Data size: 79 Basic stats: 
COMPLETE Column stats: NONE
+        Reducer 2 
+            Reduce Operator Tree:
+              Join Operator
+                condition map:
+                     Left Semi Join 0 to 1
+                     Right Outer Join0 to 2
+                condition expressions:
+                  0 {KEY.reducesinkkey0}
+                  1 
+                  2 
+                outputColumnNames: _col0
+                Statistics: Num rows: 48 Data size: 358 Basic stats: COMPLETE 
Column stats: NONE
+                Reduce Output Operator
+                  key expressions: _col0 (type: int)
+                  sort order: +
+                  Statistics: Num rows: 48 Data size: 358 Basic stats: 
COMPLETE Column stats: NONE
+        Reducer 3 
             Reduce Operator Tree:
               Select Operator
                 expressions: KEY.reducesinkkey0 (type: int)
@@ -2528,16 +2326,33 @@ PREHOOK: type: QUERY
 POSTHOOK: query: explain select a.key from t3 a left semi join t2 b on a.key = 
b.key left outer join t1 c on a.value = c.value sort by a.key
 POSTHOOK: type: QUERY
 STAGE DEPENDENCIES:
-  Stage-2 is a root stage
-  Stage-1 depends on stages: Stage-2
+  Stage-1 is a root stage
   Stage-0 depends on stages: Stage-1
 
 STAGE PLANS:
-  Stage: Stage-2
+  Stage: Stage-1
     Spark
+      Edges:
+        Reducer 2 <- Map 1 (PARTITION-LEVEL SORT, 3), Map 5 (PARTITION-LEVEL 
SORT, 3)
+        Reducer 3 <- Map 6 (PARTITION-LEVEL SORT, 3), Reducer 2 
(PARTITION-LEVEL SORT, 3)
+        Reducer 4 <- Reducer 3 (SORT, 3)
 #### A masked pattern was here ####
       Vertices:
-        Map 3 
+        Map 1 
+            Map Operator Tree:
+                TableScan
+                  alias: a
+                  Statistics: Num rows: 22 Data size: 163 Basic stats: 
COMPLETE Column stats: NONE
+                  Filter Operator
+                    predicate: key is not null (type: boolean)
+                    Statistics: Num rows: 11 Data size: 81 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: 11 Data size: 81 Basic stats: 
COMPLETE Column stats: NONE
+                      value expressions: value (type: string)
+        Map 5 
             Map Operator Tree:
                 TableScan
                   alias: b
@@ -2554,78 +2369,53 @@ STAGE PLANS:
                         mode: hash
                         outputColumnNames: _col0
                         Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
-                        Spark HashTable Sink Operator
-                          condition expressions:
-                            0 {key} {value}
-                            1 
-                          keys:
-                            0 key (type: int)
-                            1 _col0 (type: int)
-            Local Work:
-              Map Reduce Local Work
-        Map 4 
+                        Reduce Output Operator
+                          key expressions: _col0 (type: int)
+                          sort order: +
+                          Map-reduce partition columns: _col0 (type: int)
+                          Statistics: Num rows: 6 Data size: 45 Basic stats: 
COMPLETE Column stats: NONE
+        Map 6 
             Map Operator Tree:
                 TableScan
                   alias: c
                   Statistics: Num rows: 11 Data size: 79 Basic stats: COMPLETE 
Column stats: NONE
-                  Spark HashTable Sink Operator
-                    condition expressions:
-                      0 {_col0}
-                      1 
-                    keys:
-                      0 _col1 (type: string)
-                      1 value (type: string)
-            Local Work:
-              Map Reduce Local Work
-
-  Stage: Stage-1
-    Spark
-      Edges:
-        Reducer 2 <- Map 1 (SORT, 3)
-#### A masked pattern was here ####
-      Vertices:
-        Map 1 
-            Map Operator Tree:
-                TableScan
-                  alias: a

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