http://git-wip-us.apache.org/repos/asf/hive/blob/da0be3db/ql/src/test/results/clientpositive/tez/explainuser_2.q.out
----------------------------------------------------------------------
diff --git a/ql/src/test/results/clientpositive/tez/explainuser_2.q.out 
b/ql/src/test/results/clientpositive/tez/explainuser_2.q.out
index 566b451..8156789 100644
--- a/ql/src/test/results/clientpositive/tez/explainuser_2.q.out
+++ b/ql/src/test/results/clientpositive/tez/explainuser_2.q.out
@@ -192,13 +192,13 @@ Stage-0
          File Output Operator [FS_18]
             compressed:false
             Statistics:Num rows: 302 Data size: 3213 Basic stats: COMPLETE 
Column stats: NONE
-            
table:{"serde:":"org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe","input 
format:":"org.apache.hadoop.mapred.TextInputFormat","output 
format:":"org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat"}
+            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"}
             Select Operator [SEL_17]
                outputColumnNames:["_col0","_col1","_col2"]
                Statistics:Num rows: 302 Data size: 3213 Basic stats: COMPLETE 
Column stats: NONE
                Merge Join Operator [MERGEJOIN_28]
                |  condition map:[{"":"Inner Join 0 to 1"}]
-               |  keys:{"1":"_col0 (type: string)","0":"_col3 (type: string)"}
+               |  keys:{"0":"_col3 (type: string)","1":"_col0 (type: string)"}
                |  outputColumnNames:["_col0","_col3","_col6"]
                |  Statistics:Num rows: 302 Data size: 3213 Basic stats: 
COMPLETE Column stats: NONE
                |<-Map 5 [SIMPLE_EDGE]
@@ -226,7 +226,7 @@ Stage-0
                      value expressions:_col0 (type: string)
                      Merge Join Operator [MERGEJOIN_27]
                      |  condition map:[{"":"Inner Join 0 to 1"}]
-                     |  keys:{"1":"_col1 (type: string)","0":"_col0 (type: 
string)"}
+                     |  keys:{"0":"_col0 (type: string)","1":"_col1 (type: 
string)"}
                      |  outputColumnNames:["_col0","_col3"]
                      |  Statistics:Num rows: 275 Data size: 2921 Basic stats: 
COMPLETE Column stats: NONE
                      |<-Map 1 [SIMPLE_EDGE]
@@ -338,7 +338,7 @@ Stage-0
          File Output Operator [FS_69]
             compressed:false
             Statistics:Num rows: 100 Data size: 1000 Basic stats: COMPLETE 
Column stats: NONE
-            
table:{"serde:":"org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe","input 
format:":"org.apache.hadoop.mapred.TextInputFormat","output 
format:":"org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat"}
+            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"}
             Limit [LIM_68]
                Number of rows:100
                Statistics:Num rows: 100 Data size: 1000 Basic stats: COMPLETE 
Column stats: NONE
@@ -373,7 +373,7 @@ Stage-0
                                  Statistics:Num rows: 804 Data size: 8552 
Basic stats: COMPLETE Column stats: NONE
                                  Merge Join Operator [MERGEJOIN_111]
                                  |  condition map:[{"":"Inner Join 0 to 1"}]
-                                 |  keys:{"1":"_col15 (type: string), _col17 
(type: string)","0":"_col1 (type: string), _col3 (type: string)"}
+                                 |  keys:{"0":"_col1 (type: string), _col3 
(type: string)","1":"_col15 (type: string), _col17 (type: string)"}
                                  |  
outputColumnNames:["_col2","_col3","_col12","_col13","_col20","_col21"]
                                  |  Statistics:Num rows: 804 Data size: 8552 
Basic stats: COMPLETE Column stats: NONE
                                  |<-Reducer 11 [SIMPLE_EDGE]
@@ -388,7 +388,7 @@ Stage-0
                                  |        Statistics:Num rows: 731 Data size: 
7775 Basic stats: COMPLETE Column stats: NONE
                                  |        Merge Join Operator [MERGEJOIN_110]
                                  |        |  condition map:[{"":"Inner Join 0 
to 1"}]
-                                 |        |  keys:{"1":"_col2 (type: string), 
_col4 (type: string)","0":"_col4 (type: string), _col6 (type: string)"}
+                                 |        |  keys:{"0":"_col4 (type: string), 
_col6 (type: string)","1":"_col2 (type: string), _col4 (type: string)"}
                                  |        |  
outputColumnNames:["_col2","_col3","_col14","_col15","_col17"]
                                  |        |  Statistics:Num rows: 731 Data 
size: 7775 Basic stats: COMPLETE Column stats: NONE
                                  |        |<-Reducer 10 [SIMPLE_EDGE]
@@ -400,7 +400,7 @@ Stage-0
                                  |        |     value expressions:_col2 (type: 
string), _col3 (type: string)
                                  |        |     Merge Join Operator 
[MERGEJOIN_108]
                                  |        |     |  condition map:[{"":"Inner 
Join 0 to 1"}]
-                                 |        |     |  keys:{"1":"_col1 (type: 
string)","0":"_col3 (type: string)"}
+                                 |        |     |  keys:{"0":"_col3 (type: 
string)","1":"_col1 (type: string)"}
                                  |        |     |  
outputColumnNames:["_col2","_col3","_col4","_col6"]
                                  |        |     |  Statistics:Num rows: 665 
Data size: 7069 Basic stats: COMPLETE Column stats: NONE
                                  |        |     |<-Map 14 [SIMPLE_EDGE]
@@ -427,7 +427,7 @@ Stage-0
                                  |        |           value expressions:_col2 
(type: string), _col4 (type: string), _col6 (type: string)
                                  |        |           Merge Join Operator 
[MERGEJOIN_107]
                                  |        |           |  condition 
map:[{"":"Inner Join 0 to 1"}]
-                                 |        |           |  keys:{"1":"_col0 
(type: string)","0":"_col2 (type: string)"}
+                                 |        |           |  keys:{"0":"_col2 
(type: string)","1":"_col0 (type: string)"}
                                  |        |           |  
outputColumnNames:["_col2","_col3","_col4","_col6"]
                                  |        |           |  Statistics:Num rows: 
605 Data size: 6427 Basic stats: COMPLETE Column stats: NONE
                                  |        |           |<-Map 13 [SIMPLE_EDGE]
@@ -454,7 +454,7 @@ Stage-0
                                  |        |                 value 
expressions:_col3 (type: string), _col4 (type: string), _col6 (type: string)
                                  |        |                 Merge Join 
Operator [MERGEJOIN_106]
                                  |        |                 |  condition 
map:[{"":"Inner Join 0 to 1"}]
-                                 |        |                 |  
keys:{"1":"_col3 (type: string)","0":"_col1 (type: string)"}
+                                 |        |                 |  
keys:{"0":"_col1 (type: string)","1":"_col3 (type: string)"}
                                  |        |                 |  
outputColumnNames:["_col2","_col3","_col4","_col6"]
                                  |        |                 |  Statistics:Num 
rows: 550 Data size: 5843 Basic stats: COMPLETE Column stats: NONE
                                  |        |                 |<-Map 12 
[SIMPLE_EDGE]
@@ -497,7 +497,7 @@ Stage-0
                                  |              value expressions:_col3 (type: 
string), _col5 (type: string)
                                  |              Merge Join Operator 
[MERGEJOIN_109]
                                  |              |  condition map:[{"":"Inner 
Join 0 to 1"}]
-                                 |              |  keys:{"1":"_col0 (type: 
string)","0":"_col0 (type: string)"}
+                                 |              |  keys:{"0":"_col0 (type: 
string)","1":"_col0 (type: string)"}
                                  |              |  
outputColumnNames:["_col2","_col3","_col4","_col5"]
                                  |              |  Statistics:Num rows: 137 
Data size: 1460 Basic stats: COMPLETE Column stats: NONE
                                  |              |<-Map 15 [SIMPLE_EDGE]
@@ -540,7 +540,7 @@ Stage-0
                                        value expressions:_col2 (type: string)
                                        Merge Join Operator [MERGEJOIN_105]
                                        |  condition map:[{"":"Inner Join 0 to 
1"}]
-                                       |  keys:{"1":"_col0 (type: 
string)","0":"_col0 (type: string)"}
+                                       |  keys:{"0":"_col0 (type: 
string)","1":"_col0 (type: string)"}
                                        |  
outputColumnNames:["_col1","_col2","_col3"]
                                        |  Statistics:Num rows: 137 Data size: 
1460 Basic stats: COMPLETE Column stats: NONE
                                        |<-Map 1 [SIMPLE_EDGE]
@@ -616,13 +616,13 @@ Stage-0
          File Output Operator [FS_59]
             compressed:false
             Statistics:Num rows: 275 Data size: 2921 Basic stats: COMPLETE 
Column stats: NONE
-            
table:{"serde:":"org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe","input 
format:":"org.apache.hadoop.mapred.TextInputFormat","output 
format:":"org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat"}
+            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"}
             Group By Operator [GBY_57]
             |  keys:KEY._col0 (type: string), KEY._col1 (type: string)
             |  outputColumnNames:["_col0","_col1"]
             |  Statistics:Num rows: 275 Data size: 2921 Basic stats: COMPLETE 
Column stats: NONE
             |<-Union 6 [SIMPLE_EDGE]
-               |<-Reducer 5 [CONTAINS]
+               |<-Reducer 15 [CONTAINS]
                |  Reduce Output Operator [RS_56]
                |     key expressions:_col0 (type: string), _col1 (type: string)
                |     Map-reduce partition columns:_col0 (type: string), _col1 
(type: string)
@@ -632,110 +632,110 @@ Stage-0
                |        keys:_col0 (type: string), _col1 (type: string)
                |        outputColumnNames:["_col0","_col1"]
                |        Statistics:Num rows: 550 Data size: 5842 Basic stats: 
COMPLETE Column stats: NONE
-               |        Select Operator [SEL_25]
+               |        Select Operator [SEL_51]
                |           outputColumnNames:["_col0","_col1"]
                |           Statistics:Num rows: 275 Data size: 2921 Basic 
stats: COMPLETE Column stats: NONE
-               |           Merge Join Operator [MERGEJOIN_83]
+               |           Merge Join Operator [MERGEJOIN_85]
                |           |  condition map:[{"":"Inner Join 0 to 1"}]
-               |           |  keys:{"1":"_col0 (type: string)","0":"_col2 
(type: string)"}
+               |           |  keys:{"0":"_col2 (type: string)","1":"_col0 
(type: string)"}
                |           |  outputColumnNames:["_col1","_col2"]
                |           |  Statistics:Num rows: 275 Data size: 2921 Basic 
stats: COMPLETE Column stats: NONE
-               |           |<-Map 10 [SIMPLE_EDGE]
-               |           |  Reduce Output Operator [RS_23]
+               |           |<-Map 18 [SIMPLE_EDGE]
+               |           |  Reduce Output Operator [RS_49]
                |           |     key expressions:_col0 (type: string)
                |           |     Map-reduce partition columns:_col0 (type: 
string)
                |           |     sort order:+
                |           |     Statistics:Num rows: 250 Data size: 2656 
Basic stats: COMPLETE Column stats: NONE
-               |           |     Select Operator [SEL_14]
+               |           |     Select Operator [SEL_40]
                |           |        outputColumnNames:["_col0"]
                |           |        Statistics:Num rows: 250 Data size: 2656 
Basic stats: COMPLETE Column stats: NONE
-               |           |        Filter Operator [FIL_77]
+               |           |        Filter Operator [FIL_81]
                |           |           predicate:key is not null (type: 
boolean)
                |           |           Statistics:Num rows: 250 Data size: 
2656 Basic stats: COMPLETE Column stats: NONE
-               |           |           TableScan [TS_13]
+               |           |           TableScan [TS_39]
                |           |              alias:y
                |           |              Statistics:Num rows: 500 Data size: 
5312 Basic stats: COMPLETE Column stats: NONE
-               |           |<-Reducer 4 [SIMPLE_EDGE]
-               |              Reduce Output Operator [RS_21]
+               |           |<-Reducer 14 [SIMPLE_EDGE]
+               |              Reduce Output Operator [RS_47]
                |                 key expressions:_col2 (type: string)
                |                 Map-reduce partition columns:_col2 (type: 
string)
                |                 sort order:+
                |                 Statistics:Num rows: 144 Data size: 1509 
Basic stats: COMPLETE Column stats: NONE
                |                 value expressions:_col1 (type: string)
-               |                 Merge Join Operator [MERGEJOIN_82]
+               |                 Merge Join Operator [MERGEJOIN_84]
                |                 |  condition map:[{"":"Inner Join 0 to 1"}]
-               |                 |  keys:{"1":"_col1 (type: 
string)","0":"_col1 (type: string)"}
+               |                 |  keys:{"0":"_col1 (type: 
string)","1":"_col1 (type: string)"}
                |                 |  outputColumnNames:["_col1","_col2"]
                |                 |  Statistics:Num rows: 144 Data size: 1509 
Basic stats: COMPLETE Column stats: NONE
-               |                 |<-Map 9 [SIMPLE_EDGE]
-               |                 |  Reduce Output Operator [RS_18]
+               |                 |<-Map 17 [SIMPLE_EDGE]
+               |                 |  Reduce Output Operator [RS_44]
                |                 |     key expressions:_col1 (type: string)
                |                 |     Map-reduce partition columns:_col1 
(type: string)
                |                 |     sort order:+
                |                 |     Statistics:Num rows: 7 Data size: 53 
Basic stats: COMPLETE Column stats: NONE
                |                 |     value expressions:_col0 (type: string)
-               |                 |     Select Operator [SEL_12]
+               |                 |     Select Operator [SEL_38]
                |                 |        outputColumnNames:["_col0","_col1"]
                |                 |        Statistics:Num rows: 7 Data size: 53 
Basic stats: COMPLETE Column stats: NONE
-               |                 |        Filter Operator [FIL_76]
+               |                 |        Filter Operator [FIL_80]
                |                 |           predicate:(value is not null and 
key is not null) (type: boolean)
                |                 |           Statistics:Num rows: 7 Data size: 
53 Basic stats: COMPLETE Column stats: NONE
-               |                 |           TableScan [TS_11]
+               |                 |           TableScan [TS_37]
                |                 |              alias:x
                |                 |              Statistics:Num rows: 25 Data 
size: 191 Basic stats: COMPLETE Column stats: NONE
-               |                 |<-Reducer 3 [SIMPLE_EDGE]
-               |                    Reduce Output Operator [RS_16]
+               |                 |<-Reducer 13 [SIMPLE_EDGE]
+               |                    Reduce Output Operator [RS_42]
                |                       key expressions:_col1 (type: string)
                |                       Map-reduce partition columns:_col1 
(type: string)
                |                       sort order:+
                |                       Statistics:Num rows: 131 Data size: 
1372 Basic stats: COMPLETE Column stats: NONE
-               |                       Select Operator [SEL_10]
+               |                       Select Operator [SEL_36]
                |                          outputColumnNames:["_col1"]
                |                          Statistics:Num rows: 131 Data size: 
1372 Basic stats: COMPLETE Column stats: NONE
-               |                          Group By Operator [GBY_9]
+               |                          Group By Operator [GBY_35]
                |                          |  keys:KEY._col0 (type: string), 
KEY._col1 (type: string)
                |                          |  
outputColumnNames:["_col0","_col1"]
                |                          |  Statistics:Num rows: 131 Data 
size: 1372 Basic stats: COMPLETE Column stats: NONE
-               |                          |<-Union 2 [SIMPLE_EDGE]
-               |                             |<-Map 1 [CONTAINS]
-               |                             |  Reduce Output Operator [RS_8]
+               |                          |<-Union 12 [SIMPLE_EDGE]
+               |                             |<-Map 11 [CONTAINS]
+               |                             |  Reduce Output Operator [RS_34]
                |                             |     key expressions:_col0 
(type: string), _col1 (type: string)
                |                             |     Map-reduce partition 
columns:_col0 (type: string), _col1 (type: string)
                |                             |     sort order:++
                |                             |     Statistics:Num rows: 263 
Data size: 2755 Basic stats: COMPLETE Column stats: NONE
-               |                             |     Group By Operator [GBY_7]
+               |                             |     Group By Operator [GBY_33]
                |                             |        keys:_col0 (type: 
string), _col1 (type: string)
                |                             |        
outputColumnNames:["_col0","_col1"]
                |                             |        Statistics:Num rows: 263 
Data size: 2755 Basic stats: COMPLETE Column stats: NONE
-               |                             |        Select Operator [SEL_1]
+               |                             |        Select Operator [SEL_27]
                |                             |           
outputColumnNames:["_col0","_col1"]
                |                             |           Statistics:Num rows: 
13 Data size: 99 Basic stats: COMPLETE Column stats: NONE
-               |                             |           Filter Operator 
[FIL_74]
+               |                             |           Filter Operator 
[FIL_78]
                |                             |              predicate:value is 
not null (type: boolean)
                |                             |              Statistics:Num 
rows: 13 Data size: 99 Basic stats: COMPLETE Column stats: NONE
-               |                             |              TableScan [TS_0]
+               |                             |              TableScan [TS_26]
                |                             |                 alias:x
                |                             |                 Statistics:Num 
rows: 25 Data size: 191 Basic stats: COMPLETE Column stats: NONE
-               |                             |<-Map 8 [CONTAINS]
-               |                                Reduce Output Operator [RS_8]
+               |                             |<-Map 16 [CONTAINS]
+               |                                Reduce Output Operator [RS_34]
                |                                   key expressions:_col0 
(type: string), _col1 (type: string)
                |                                   Map-reduce partition 
columns:_col0 (type: string), _col1 (type: string)
                |                                   sort order:++
                |                                   Statistics:Num rows: 263 
Data size: 2755 Basic stats: COMPLETE Column stats: NONE
-               |                                   Group By Operator [GBY_7]
+               |                                   Group By Operator [GBY_33]
                |                                      keys:_col0 (type: 
string), _col1 (type: string)
                |                                      
outputColumnNames:["_col0","_col1"]
                |                                      Statistics:Num rows: 263 
Data size: 2755 Basic stats: COMPLETE Column stats: NONE
-               |                                      Select Operator [SEL_3]
+               |                                      Select Operator [SEL_29]
                |                                         
outputColumnNames:["_col0","_col1"]
                |                                         Statistics:Num rows: 
250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
-               |                                         Filter Operator 
[FIL_75]
+               |                                         Filter Operator 
[FIL_79]
                |                                            predicate:value is 
not null (type: boolean)
                |                                            Statistics:Num 
rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
-               |                                            TableScan [TS_2]
+               |                                            TableScan [TS_28]
                |                                               alias:y
                |                                               Statistics:Num 
rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: NONE
-               |<-Reducer 15 [CONTAINS]
+               |<-Reducer 5 [CONTAINS]
                   Reduce Output Operator [RS_56]
                      key expressions:_col0 (type: string), _col1 (type: string)
                      Map-reduce partition columns:_col0 (type: string), _col1 
(type: string)
@@ -745,107 +745,107 @@ Stage-0
                         keys:_col0 (type: string), _col1 (type: string)
                         outputColumnNames:["_col0","_col1"]
                         Statistics:Num rows: 550 Data size: 5842 Basic stats: 
COMPLETE Column stats: NONE
-                        Select Operator [SEL_51]
+                        Select Operator [SEL_25]
                            outputColumnNames:["_col0","_col1"]
                            Statistics:Num rows: 275 Data size: 2921 Basic 
stats: COMPLETE Column stats: NONE
-                           Merge Join Operator [MERGEJOIN_85]
+                           Merge Join Operator [MERGEJOIN_83]
                            |  condition map:[{"":"Inner Join 0 to 1"}]
-                           |  keys:{"1":"_col0 (type: string)","0":"_col2 
(type: string)"}
+                           |  keys:{"0":"_col2 (type: string)","1":"_col0 
(type: string)"}
                            |  outputColumnNames:["_col1","_col2"]
                            |  Statistics:Num rows: 275 Data size: 2921 Basic 
stats: COMPLETE Column stats: NONE
-                           |<-Map 18 [SIMPLE_EDGE]
-                           |  Reduce Output Operator [RS_49]
+                           |<-Map 10 [SIMPLE_EDGE]
+                           |  Reduce Output Operator [RS_23]
                            |     key expressions:_col0 (type: string)
                            |     Map-reduce partition columns:_col0 (type: 
string)
                            |     sort order:+
                            |     Statistics:Num rows: 250 Data size: 2656 
Basic stats: COMPLETE Column stats: NONE
-                           |     Select Operator [SEL_40]
+                           |     Select Operator [SEL_14]
                            |        outputColumnNames:["_col0"]
                            |        Statistics:Num rows: 250 Data size: 2656 
Basic stats: COMPLETE Column stats: NONE
-                           |        Filter Operator [FIL_81]
+                           |        Filter Operator [FIL_77]
                            |           predicate:key is not null (type: 
boolean)
                            |           Statistics:Num rows: 250 Data size: 
2656 Basic stats: COMPLETE Column stats: NONE
-                           |           TableScan [TS_39]
+                           |           TableScan [TS_13]
                            |              alias:y
                            |              Statistics:Num rows: 500 Data size: 
5312 Basic stats: COMPLETE Column stats: NONE
-                           |<-Reducer 14 [SIMPLE_EDGE]
-                              Reduce Output Operator [RS_47]
+                           |<-Reducer 4 [SIMPLE_EDGE]
+                              Reduce Output Operator [RS_21]
                                  key expressions:_col2 (type: string)
                                  Map-reduce partition columns:_col2 (type: 
string)
                                  sort order:+
                                  Statistics:Num rows: 144 Data size: 1509 
Basic stats: COMPLETE Column stats: NONE
                                  value expressions:_col1 (type: string)
-                                 Merge Join Operator [MERGEJOIN_84]
+                                 Merge Join Operator [MERGEJOIN_82]
                                  |  condition map:[{"":"Inner Join 0 to 1"}]
-                                 |  keys:{"1":"_col1 (type: 
string)","0":"_col1 (type: string)"}
+                                 |  keys:{"0":"_col1 (type: 
string)","1":"_col1 (type: string)"}
                                  |  outputColumnNames:["_col1","_col2"]
                                  |  Statistics:Num rows: 144 Data size: 1509 
Basic stats: COMPLETE Column stats: NONE
-                                 |<-Map 17 [SIMPLE_EDGE]
-                                 |  Reduce Output Operator [RS_44]
+                                 |<-Map 9 [SIMPLE_EDGE]
+                                 |  Reduce Output Operator [RS_18]
                                  |     key expressions:_col1 (type: string)
                                  |     Map-reduce partition columns:_col1 
(type: string)
                                  |     sort order:+
                                  |     Statistics:Num rows: 7 Data size: 53 
Basic stats: COMPLETE Column stats: NONE
                                  |     value expressions:_col0 (type: string)
-                                 |     Select Operator [SEL_38]
+                                 |     Select Operator [SEL_12]
                                  |        outputColumnNames:["_col0","_col1"]
                                  |        Statistics:Num rows: 7 Data size: 53 
Basic stats: COMPLETE Column stats: NONE
-                                 |        Filter Operator [FIL_80]
+                                 |        Filter Operator [FIL_76]
                                  |           predicate:(value is not null and 
key is not null) (type: boolean)
                                  |           Statistics:Num rows: 7 Data size: 
53 Basic stats: COMPLETE Column stats: NONE
-                                 |           TableScan [TS_37]
+                                 |           TableScan [TS_11]
                                  |              alias:x
                                  |              Statistics:Num rows: 25 Data 
size: 191 Basic stats: COMPLETE Column stats: NONE
-                                 |<-Reducer 13 [SIMPLE_EDGE]
-                                    Reduce Output Operator [RS_42]
+                                 |<-Reducer 3 [SIMPLE_EDGE]
+                                    Reduce Output Operator [RS_16]
                                        key expressions:_col1 (type: string)
                                        Map-reduce partition columns:_col1 
(type: string)
                                        sort order:+
                                        Statistics:Num rows: 131 Data size: 
1372 Basic stats: COMPLETE Column stats: NONE
-                                       Select Operator [SEL_36]
+                                       Select Operator [SEL_10]
                                           outputColumnNames:["_col1"]
                                           Statistics:Num rows: 131 Data size: 
1372 Basic stats: COMPLETE Column stats: NONE
-                                          Group By Operator [GBY_35]
+                                          Group By Operator [GBY_9]
                                           |  keys:KEY._col0 (type: string), 
KEY._col1 (type: string)
                                           |  
outputColumnNames:["_col0","_col1"]
                                           |  Statistics:Num rows: 131 Data 
size: 1372 Basic stats: COMPLETE Column stats: NONE
-                                          |<-Union 12 [SIMPLE_EDGE]
-                                             |<-Map 11 [CONTAINS]
-                                             |  Reduce Output Operator [RS_34]
+                                          |<-Union 2 [SIMPLE_EDGE]
+                                             |<-Map 1 [CONTAINS]
+                                             |  Reduce Output Operator [RS_8]
                                              |     key expressions:_col0 
(type: string), _col1 (type: string)
                                              |     Map-reduce partition 
columns:_col0 (type: string), _col1 (type: string)
                                              |     sort order:++
                                              |     Statistics:Num rows: 263 
Data size: 2755 Basic stats: COMPLETE Column stats: NONE
-                                             |     Group By Operator [GBY_33]
+                                             |     Group By Operator [GBY_7]
                                              |        keys:_col0 (type: 
string), _col1 (type: string)
                                              |        
outputColumnNames:["_col0","_col1"]
                                              |        Statistics:Num rows: 263 
Data size: 2755 Basic stats: COMPLETE Column stats: NONE
-                                             |        Select Operator [SEL_27]
+                                             |        Select Operator [SEL_1]
                                              |           
outputColumnNames:["_col0","_col1"]
                                              |           Statistics:Num rows: 
13 Data size: 99 Basic stats: COMPLETE Column stats: NONE
-                                             |           Filter Operator 
[FIL_78]
+                                             |           Filter Operator 
[FIL_74]
                                              |              predicate:value is 
not null (type: boolean)
                                              |              Statistics:Num 
rows: 13 Data size: 99 Basic stats: COMPLETE Column stats: NONE
-                                             |              TableScan [TS_26]
+                                             |              TableScan [TS_0]
                                              |                 alias:x
                                              |                 Statistics:Num 
rows: 25 Data size: 191 Basic stats: COMPLETE Column stats: NONE
-                                             |<-Map 16 [CONTAINS]
-                                                Reduce Output Operator [RS_34]
+                                             |<-Map 8 [CONTAINS]
+                                                Reduce Output Operator [RS_8]
                                                    key expressions:_col0 
(type: string), _col1 (type: string)
                                                    Map-reduce partition 
columns:_col0 (type: string), _col1 (type: string)
                                                    sort order:++
                                                    Statistics:Num rows: 263 
Data size: 2755 Basic stats: COMPLETE Column stats: NONE
-                                                   Group By Operator [GBY_33]
+                                                   Group By Operator [GBY_7]
                                                       keys:_col0 (type: 
string), _col1 (type: string)
                                                       
outputColumnNames:["_col0","_col1"]
                                                       Statistics:Num rows: 263 
Data size: 2755 Basic stats: COMPLETE Column stats: NONE
-                                                      Select Operator [SEL_29]
+                                                      Select Operator [SEL_3]
                                                          
outputColumnNames:["_col0","_col1"]
                                                          Statistics:Num rows: 
250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
-                                                         Filter Operator 
[FIL_79]
+                                                         Filter Operator 
[FIL_75]
                                                             predicate:value is 
not null (type: boolean)
                                                             Statistics:Num 
rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: NONE
-                                                            TableScan [TS_28]
+                                                            TableScan [TS_2]
                                                                alias:y
                                                                Statistics:Num 
rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: NONE
 
@@ -910,7 +910,7 @@ Stage-0
          File Output Operator [FS_119]
             compressed:false
             Statistics:Num rows: 275 Data size: 2921 Basic stats: COMPLETE 
Column stats: NONE
-            
table:{"serde:":"org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe","input 
format:":"org.apache.hadoop.mapred.TextInputFormat","output 
format:":"org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat"}
+            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"}
             Group By Operator [GBY_117]
             |  keys:KEY._col0 (type: string), KEY._col1 (type: string)
             |  outputColumnNames:["_col0","_col1"]
@@ -931,7 +931,7 @@ Stage-0
                |           Statistics:Num rows: 275 Data size: 2921 Basic 
stats: COMPLETE Column stats: NONE
                |           Merge Join Operator [MERGEJOIN_167]
                |           |  condition map:[{"":"Inner Join 0 to 1"}]
-               |           |  keys:{"1":"_col0 (type: string)","0":"_col2 
(type: string)"}
+               |           |  keys:{"0":"_col2 (type: string)","1":"_col0 
(type: string)"}
                |           |  outputColumnNames:["_col2","_col5"]
                |           |  Statistics:Num rows: 275 Data size: 2921 Basic 
stats: COMPLETE Column stats: NONE
                |           |<-Map 37 [SIMPLE_EDGE]
@@ -958,7 +958,7 @@ Stage-0
                |                 Statistics:Num rows: 242 Data size: 2565 
Basic stats: COMPLETE Column stats: NONE
                |                 Merge Join Operator [MERGEJOIN_166]
                |                 |  condition map:[{"":"Inner Join 0 to 1"}]
-               |                 |  keys:{"1":"_col1 (type: 
string)","0":"_col1 (type: string)"}
+               |                 |  keys:{"0":"_col1 (type: 
string)","1":"_col1 (type: string)"}
                |                 |  outputColumnNames:["_col2"]
                |                 |  Statistics:Num rows: 242 Data size: 2565 
Basic stats: COMPLETE Column stats: NONE
                |                 |<-Map 36 [SIMPLE_EDGE]
@@ -1112,7 +1112,7 @@ Stage-0
                         |  outputColumnNames:["_col0","_col1"]
                         |  Statistics:Num rows: 275 Data size: 2921 Basic 
stats: COMPLETE Column stats: NONE
                         |<-Union 6 [SIMPLE_EDGE]
-                           |<-Reducer 5 [CONTAINS]
+                           |<-Reducer 19 [CONTAINS]
                            |  Reduce Output Operator [RS_65]
                            |     key expressions:_col0 (type: string), _col1 
(type: string)
                            |     Map-reduce partition columns:_col0 (type: 
string), _col1 (type: string)
@@ -1122,110 +1122,144 @@ Stage-0
                            |        keys:_col0 (type: string), _col1 (type: 
string)
                            |        outputColumnNames:["_col0","_col1"]
                            |        Statistics:Num rows: 550 Data size: 5842 
Basic stats: COMPLETE Column stats: NONE
-                           |        Select Operator [SEL_25]
+                           |        Select Operator [SEL_60]
                            |           outputColumnNames:["_col0","_col1"]
                            |           Statistics:Num rows: 275 Data size: 
2921 Basic stats: COMPLETE Column stats: NONE
-                           |           Merge Join Operator [MERGEJOIN_163]
+                           |           Merge Join Operator [MERGEJOIN_165]
                            |           |  condition map:[{"":"Inner Join 0 to 
1"}]
-                           |           |  keys:{"1":"_col0 (type: 
string)","0":"_col2 (type: string)"}
+                           |           |  keys:{"0":"_col2 (type: 
string)","1":"_col0 (type: string)"}
                            |           |  outputColumnNames:["_col2","_col5"]
                            |           |  Statistics:Num rows: 275 Data size: 
2921 Basic stats: COMPLETE Column stats: NONE
-                           |           |<-Map 12 [SIMPLE_EDGE]
-                           |           |  Reduce Output Operator [RS_23]
+                           |           |<-Map 23 [SIMPLE_EDGE]
+                           |           |  Reduce Output Operator [RS_58]
                            |           |     key expressions:_col0 (type: 
string)
                            |           |     Map-reduce partition 
columns:_col0 (type: string)
                            |           |     sort order:+
                            |           |     Statistics:Num rows: 250 Data 
size: 2656 Basic stats: COMPLETE Column stats: NONE
                            |           |     value expressions:_col1 (type: 
string)
-                           |           |     Select Operator [SEL_14]
+                           |           |     Select Operator [SEL_49]
                            |           |        
outputColumnNames:["_col0","_col1"]
                            |           |        Statistics:Num rows: 250 Data 
size: 2656 Basic stats: COMPLETE Column stats: NONE
-                           |           |        Filter Operator [FIL_150]
+                           |           |        Filter Operator [FIL_155]
                            |           |           predicate:key is not null 
(type: boolean)
                            |           |           Statistics:Num rows: 250 
Data size: 2656 Basic stats: COMPLETE Column stats: NONE
-                           |           |           TableScan [TS_13]
+                           |           |           TableScan [TS_48]
                            |           |              alias:y
                            |           |              Statistics:Num rows: 500 
Data size: 5312 Basic stats: COMPLETE Column stats: NONE
-                           |           |<-Reducer 4 [SIMPLE_EDGE]
-                           |              Reduce Output Operator [RS_21]
+                           |           |<-Reducer 18 [SIMPLE_EDGE]
+                           |              Reduce Output Operator [RS_56]
                            |                 key expressions:_col2 (type: 
string)
                            |                 Map-reduce partition 
columns:_col2 (type: string)
                            |                 sort order:+
-                           |                 Statistics:Num rows: 144 Data 
size: 1509 Basic stats: COMPLETE Column stats: NONE
-                           |                 Merge Join Operator 
[MERGEJOIN_162]
+                           |                 Statistics:Num rows: 209 Data 
size: 2208 Basic stats: COMPLETE Column stats: NONE
+                           |                 Merge Join Operator 
[MERGEJOIN_164]
                            |                 |  condition map:[{"":"Inner Join 
0 to 1"}]
-                           |                 |  keys:{"1":"_col1 (type: 
string)","0":"_col1 (type: string)"}
+                           |                 |  keys:{"0":"_col1 (type: 
string)","1":"_col1 (type: string)"}
                            |                 |  outputColumnNames:["_col2"]
-                           |                 |  Statistics:Num rows: 144 Data 
size: 1509 Basic stats: COMPLETE Column stats: NONE
-                           |                 |<-Map 11 [SIMPLE_EDGE]
-                           |                 |  Reduce Output Operator [RS_18]
+                           |                 |  Statistics:Num rows: 209 Data 
size: 2208 Basic stats: COMPLETE Column stats: NONE
+                           |                 |<-Map 22 [SIMPLE_EDGE]
+                           |                 |  Reduce Output Operator [RS_53]
                            |                 |     key expressions:_col1 
(type: string)
                            |                 |     Map-reduce partition 
columns:_col1 (type: string)
                            |                 |     sort order:+
                            |                 |     Statistics:Num rows: 7 Data 
size: 53 Basic stats: COMPLETE Column stats: NONE
                            |                 |     value expressions:_col0 
(type: string)
-                           |                 |     Select Operator [SEL_12]
+                           |                 |     Select Operator [SEL_47]
                            |                 |        
outputColumnNames:["_col0","_col1"]
                            |                 |        Statistics:Num rows: 7 
Data size: 53 Basic stats: COMPLETE Column stats: NONE
-                           |                 |        Filter Operator [FIL_149]
+                           |                 |        Filter Operator [FIL_154]
                            |                 |           predicate:(value is 
not null and key is not null) (type: boolean)
                            |                 |           Statistics:Num rows: 
7 Data size: 53 Basic stats: COMPLETE Column stats: NONE
-                           |                 |           TableScan [TS_11]
+                           |                 |           TableScan [TS_46]
                            |                 |              alias:x
                            |                 |              Statistics:Num 
rows: 25 Data size: 191 Basic stats: COMPLETE Column stats: NONE
-                           |                 |<-Reducer 3 [SIMPLE_EDGE]
-                           |                    Reduce Output Operator [RS_16]
+                           |                 |<-Reducer 17 [SIMPLE_EDGE]
+                           |                    Reduce Output Operator [RS_51]
                            |                       key expressions:_col1 
(type: string)
                            |                       Map-reduce partition 
columns:_col1 (type: string)
                            |                       sort order:+
-                           |                       Statistics:Num rows: 131 
Data size: 1372 Basic stats: COMPLETE Column stats: NONE
-                           |                       Select Operator [SEL_10]
+                           |                       Statistics:Num rows: 190 
Data size: 2008 Basic stats: COMPLETE Column stats: NONE
+                           |                       Select Operator [SEL_45]
                            |                          
outputColumnNames:["_col1"]
-                           |                          Statistics:Num rows: 131 
Data size: 1372 Basic stats: COMPLETE Column stats: NONE
-                           |                          Group By Operator [GBY_9]
+                           |                          Statistics:Num rows: 190 
Data size: 2008 Basic stats: COMPLETE Column stats: NONE
+                           |                          Group By Operator 
[GBY_44]
                            |                          |  keys:KEY._col0 (type: 
string), KEY._col1 (type: string)
                            |                          |  
outputColumnNames:["_col0","_col1"]
-                           |                          |  Statistics:Num rows: 
131 Data size: 1372 Basic stats: COMPLETE Column stats: NONE
-                           |                          |<-Union 2 [SIMPLE_EDGE]
-                           |                             |<-Map 1 [CONTAINS]
-                           |                             |  Reduce Output 
Operator [RS_8]
+                           |                          |  Statistics:Num rows: 
190 Data size: 2008 Basic stats: COMPLETE Column stats: NONE
+                           |                          |<-Union 16 [SIMPLE_EDGE]
+                           |                             |<-Map 21 [CONTAINS]
+                           |                             |  Reduce Output 
Operator [RS_43]
                            |                             |     key 
expressions:_col0 (type: string), _col1 (type: string)
                            |                             |     Map-reduce 
partition columns:_col0 (type: string), _col1 (type: string)
                            |                             |     sort order:++
-                           |                             |     Statistics:Num 
rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: NONE
-                           |                             |     Group By 
Operator [GBY_7]
+                           |                             |     Statistics:Num 
rows: 381 Data size: 4028 Basic stats: COMPLETE Column stats: NONE
+                           |                             |     Group By 
Operator [GBY_42]
                            |                             |        keys:_col0 
(type: string), _col1 (type: string)
                            |                             |        
outputColumnNames:["_col0","_col1"]
-                           |                             |        
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
-                           |                             |        Select 
Operator [SEL_1]
+                           |                             |        
Statistics:Num rows: 381 Data size: 4028 Basic stats: COMPLETE Column stats: 
NONE
+                           |                             |        Select 
Operator [SEL_38]
                            |                             |           
outputColumnNames:["_col0","_col1"]
-                           |                             |           
Statistics:Num rows: 13 Data size: 99 Basic stats: COMPLETE Column stats: NONE
-                           |                             |           Filter 
Operator [FIL_147]
+                           |                             |           
Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: 
NONE
+                           |                             |           Filter 
Operator [FIL_153]
                            |                             |              
predicate:value is not null (type: boolean)
-                           |                             |              
Statistics:Num rows: 13 Data size: 99 Basic stats: COMPLETE Column stats: NONE
-                           |                             |              
TableScan [TS_0]
-                           |                             |                 
alias:x
-                           |                             |                 
Statistics:Num rows: 25 Data size: 191 Basic stats: COMPLETE Column stats: NONE
-                           |                             |<-Map 10 [CONTAINS]
-                           |                                Reduce Output 
Operator [RS_8]
+                           |                             |              
Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: 
NONE
+                           |                             |              
TableScan [TS_37]
+                           |                             |                 
alias:y
+                           |                             |                 
Statistics:Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: 
NONE
+                           |                             |<-Reducer 15 
[CONTAINS]
+                           |                                Reduce Output 
Operator [RS_43]
                            |                                   key 
expressions:_col0 (type: string), _col1 (type: string)
                            |                                   Map-reduce 
partition columns:_col0 (type: string), _col1 (type: string)
                            |                                   sort order:++
-                           |                                   Statistics:Num 
rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: NONE
-                           |                                   Group By 
Operator [GBY_7]
+                           |                                   Statistics:Num 
rows: 381 Data size: 4028 Basic stats: COMPLETE Column stats: NONE
+                           |                                   Group By 
Operator [GBY_42]
                            |                                      keys:_col0 
(type: string), _col1 (type: string)
                            |                                      
outputColumnNames:["_col0","_col1"]
-                           |                                      
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
-                           |                                      Select 
Operator [SEL_3]
-                           |                                         
outputColumnNames:["_col0","_col1"]
-                           |                                         
Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: 
NONE
-                           |                                         Filter 
Operator [FIL_148]
-                           |                                            
predicate:value is not null (type: boolean)
-                           |                                            
Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: 
NONE
-                           |                                            
TableScan [TS_2]
-                           |                                               
alias:y
-                           |                                               
Statistics:Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: 
NONE
-                           |<-Reducer 19 [CONTAINS]
+                           |                                      
Statistics:Num rows: 381 Data size: 4028 Basic stats: COMPLETE Column stats: 
NONE
+                           |                                      Group By 
Operator [GBY_35]
+                           |                                      |  
keys:KEY._col0 (type: string), KEY._col1 (type: string)
+                           |                                      |  
outputColumnNames:["_col0","_col1"]
+                           |                                      |  
Statistics:Num rows: 131 Data size: 1372 Basic stats: COMPLETE Column stats: 
NONE
+                           |                                      |<-Union 14 
[SIMPLE_EDGE]
+                           |                                         |<-Map 13 
[CONTAINS]
+                           |                                         |  Reduce 
Output Operator [RS_34]
+                           |                                         |     key 
expressions:_col0 (type: string), _col1 (type: string)
+                           |                                         |     
Map-reduce partition columns:_col0 (type: string), _col1 (type: string)
+                           |                                         |     
sort order:++
+                           |                                         |     
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
+                           |                                         |     
Group By Operator [GBY_33]
+                           |                                         |        
keys:_col0 (type: string), _col1 (type: string)
+                           |                                         |        
outputColumnNames:["_col0","_col1"]
+                           |                                         |        
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
+                           |                                         |        
Select Operator [SEL_27]
+                           |                                         |         
  outputColumnNames:["_col0","_col1"]
+                           |                                         |         
  Statistics:Num rows: 13 Data size: 99 Basic stats: COMPLETE Column stats: NONE
+                           |                                         |         
  Filter Operator [FIL_151]
+                           |                                         |         
     predicate:value is not null (type: boolean)
+                           |                                         |         
     Statistics:Num rows: 13 Data size: 99 Basic stats: COMPLETE Column stats: 
NONE
+                           |                                         |         
     TableScan [TS_26]
+                           |                                         |         
        alias:x
+                           |                                         |         
        Statistics:Num rows: 25 Data size: 191 Basic stats: COMPLETE Column 
stats: NONE
+                           |                                         |<-Map 20 
[CONTAINS]
+                           |                                            Reduce 
Output Operator [RS_34]
+                           |                                               key 
expressions:_col0 (type: string), _col1 (type: string)
+                           |                                               
Map-reduce partition columns:_col0 (type: string), _col1 (type: string)
+                           |                                               
sort order:++
+                           |                                               
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
+                           |                                               
Group By Operator [GBY_33]
+                           |                                                  
keys:_col0 (type: string), _col1 (type: string)
+                           |                                                  
outputColumnNames:["_col0","_col1"]
+                           |                                                  
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
+                           |                                                  
Select Operator [SEL_29]
+                           |                                                   
  outputColumnNames:["_col0","_col1"]
+                           |                                                   
  Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: 
NONE
+                           |                                                   
  Filter Operator [FIL_152]
+                           |                                                   
     predicate:value is not null (type: boolean)
+                           |                                                   
     Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column 
stats: NONE
+                           |                                                   
     TableScan [TS_28]
+                           |                                                   
        alias:y
+                           |                                                   
        Statistics:Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column 
stats: NONE
+                           |<-Reducer 5 [CONTAINS]
                               Reduce Output Operator [RS_65]
                                  key expressions:_col0 (type: string), _col1 
(type: string)
                                  Map-reduce partition columns:_col0 (type: 
string), _col1 (type: string)
@@ -1235,143 +1269,109 @@ Stage-0
                                     keys:_col0 (type: string), _col1 (type: 
string)
                                     outputColumnNames:["_col0","_col1"]
                                     Statistics:Num rows: 550 Data size: 5842 
Basic stats: COMPLETE Column stats: NONE
-                                    Select Operator [SEL_60]
+                                    Select Operator [SEL_25]
                                        outputColumnNames:["_col0","_col1"]
                                        Statistics:Num rows: 275 Data size: 
2921 Basic stats: COMPLETE Column stats: NONE
-                                       Merge Join Operator [MERGEJOIN_165]
+                                       Merge Join Operator [MERGEJOIN_163]
                                        |  condition map:[{"":"Inner Join 0 to 
1"}]
-                                       |  keys:{"1":"_col0 (type: 
string)","0":"_col2 (type: string)"}
+                                       |  keys:{"0":"_col2 (type: 
string)","1":"_col0 (type: string)"}
                                        |  outputColumnNames:["_col2","_col5"]
                                        |  Statistics:Num rows: 275 Data size: 
2921 Basic stats: COMPLETE Column stats: NONE
-                                       |<-Map 23 [SIMPLE_EDGE]
-                                       |  Reduce Output Operator [RS_58]
+                                       |<-Map 12 [SIMPLE_EDGE]
+                                       |  Reduce Output Operator [RS_23]
                                        |     key expressions:_col0 (type: 
string)
                                        |     Map-reduce partition 
columns:_col0 (type: string)
                                        |     sort order:+
                                        |     Statistics:Num rows: 250 Data 
size: 2656 Basic stats: COMPLETE Column stats: NONE
                                        |     value expressions:_col1 (type: 
string)
-                                       |     Select Operator [SEL_49]
+                                       |     Select Operator [SEL_14]
                                        |        
outputColumnNames:["_col0","_col1"]
                                        |        Statistics:Num rows: 250 Data 
size: 2656 Basic stats: COMPLETE Column stats: NONE
-                                       |        Filter Operator [FIL_155]
+                                       |        Filter Operator [FIL_150]
                                        |           predicate:key is not null 
(type: boolean)
                                        |           Statistics:Num rows: 250 
Data size: 2656 Basic stats: COMPLETE Column stats: NONE
-                                       |           TableScan [TS_48]
+                                       |           TableScan [TS_13]
                                        |              alias:y
                                        |              Statistics:Num rows: 500 
Data size: 5312 Basic stats: COMPLETE Column stats: NONE
-                                       |<-Reducer 18 [SIMPLE_EDGE]
-                                          Reduce Output Operator [RS_56]
+                                       |<-Reducer 4 [SIMPLE_EDGE]
+                                          Reduce Output Operator [RS_21]
                                              key expressions:_col2 (type: 
string)
                                              Map-reduce partition 
columns:_col2 (type: string)
                                              sort order:+
-                                             Statistics:Num rows: 209 Data 
size: 2208 Basic stats: COMPLETE Column stats: NONE
-                                             Merge Join Operator 
[MERGEJOIN_164]
+                                             Statistics:Num rows: 144 Data 
size: 1509 Basic stats: COMPLETE Column stats: NONE
+                                             Merge Join Operator 
[MERGEJOIN_162]
                                              |  condition map:[{"":"Inner Join 
0 to 1"}]
-                                             |  keys:{"1":"_col1 (type: 
string)","0":"_col1 (type: string)"}
+                                             |  keys:{"0":"_col1 (type: 
string)","1":"_col1 (type: string)"}
                                              |  outputColumnNames:["_col2"]
-                                             |  Statistics:Num rows: 209 Data 
size: 2208 Basic stats: COMPLETE Column stats: NONE
-                                             |<-Map 22 [SIMPLE_EDGE]
-                                             |  Reduce Output Operator [RS_53]
+                                             |  Statistics:Num rows: 144 Data 
size: 1509 Basic stats: COMPLETE Column stats: NONE
+                                             |<-Map 11 [SIMPLE_EDGE]
+                                             |  Reduce Output Operator [RS_18]
                                              |     key expressions:_col1 
(type: string)
                                              |     Map-reduce partition 
columns:_col1 (type: string)
                                              |     sort order:+
                                              |     Statistics:Num rows: 7 Data 
size: 53 Basic stats: COMPLETE Column stats: NONE
                                              |     value expressions:_col0 
(type: string)
-                                             |     Select Operator [SEL_47]
+                                             |     Select Operator [SEL_12]
                                              |        
outputColumnNames:["_col0","_col1"]
                                              |        Statistics:Num rows: 7 
Data size: 53 Basic stats: COMPLETE Column stats: NONE
-                                             |        Filter Operator [FIL_154]
+                                             |        Filter Operator [FIL_149]
                                              |           predicate:(value is 
not null and key is not null) (type: boolean)
                                              |           Statistics:Num rows: 
7 Data size: 53 Basic stats: COMPLETE Column stats: NONE
-                                             |           TableScan [TS_46]
+                                             |           TableScan [TS_11]
                                              |              alias:x
                                              |              Statistics:Num 
rows: 25 Data size: 191 Basic stats: COMPLETE Column stats: NONE
-                                             |<-Reducer 17 [SIMPLE_EDGE]
-                                                Reduce Output Operator [RS_51]
+                                             |<-Reducer 3 [SIMPLE_EDGE]
+                                                Reduce Output Operator [RS_16]
                                                    key expressions:_col1 
(type: string)
                                                    Map-reduce partition 
columns:_col1 (type: string)
                                                    sort order:+
-                                                   Statistics:Num rows: 190 
Data size: 2008 Basic stats: COMPLETE Column stats: NONE
-                                                   Select Operator [SEL_45]
+                                                   Statistics:Num rows: 131 
Data size: 1372 Basic stats: COMPLETE Column stats: NONE
+                                                   Select Operator [SEL_10]
                                                       
outputColumnNames:["_col1"]
-                                                      Statistics:Num rows: 190 
Data size: 2008 Basic stats: COMPLETE Column stats: NONE
-                                                      Group By Operator 
[GBY_44]
+                                                      Statistics:Num rows: 131 
Data size: 1372 Basic stats: COMPLETE Column stats: NONE
+                                                      Group By Operator [GBY_9]
                                                       |  keys:KEY._col0 (type: 
string), KEY._col1 (type: string)
                                                       |  
outputColumnNames:["_col0","_col1"]
-                                                      |  Statistics:Num rows: 
190 Data size: 2008 Basic stats: COMPLETE Column stats: NONE
-                                                      |<-Union 16 [SIMPLE_EDGE]
-                                                         |<-Map 21 [CONTAINS]
-                                                         |  Reduce Output 
Operator [RS_43]
+                                                      |  Statistics:Num rows: 
131 Data size: 1372 Basic stats: COMPLETE Column stats: NONE
+                                                      |<-Union 2 [SIMPLE_EDGE]
+                                                         |<-Map 1 [CONTAINS]
+                                                         |  Reduce Output 
Operator [RS_8]
                                                          |     key 
expressions:_col0 (type: string), _col1 (type: string)
                                                          |     Map-reduce 
partition columns:_col0 (type: string), _col1 (type: string)
                                                          |     sort order:++
-                                                         |     Statistics:Num 
rows: 381 Data size: 4028 Basic stats: COMPLETE Column stats: NONE
-                                                         |     Group By 
Operator [GBY_42]
+                                                         |     Statistics:Num 
rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: NONE
+                                                         |     Group By 
Operator [GBY_7]
                                                          |        keys:_col0 
(type: string), _col1 (type: string)
                                                          |        
outputColumnNames:["_col0","_col1"]
-                                                         |        
Statistics:Num rows: 381 Data size: 4028 Basic stats: COMPLETE Column stats: 
NONE
-                                                         |        Select 
Operator [SEL_38]
+                                                         |        
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
+                                                         |        Select 
Operator [SEL_1]
                                                          |           
outputColumnNames:["_col0","_col1"]
-                                                         |           
Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: 
NONE
-                                                         |           Filter 
Operator [FIL_153]
+                                                         |           
Statistics:Num rows: 13 Data size: 99 Basic stats: COMPLETE Column stats: NONE
+                                                         |           Filter 
Operator [FIL_147]
                                                          |              
predicate:value is not null (type: boolean)
-                                                         |              
Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: 
NONE
-                                                         |              
TableScan [TS_37]
-                                                         |                 
alias:y
-                                                         |                 
Statistics:Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: 
NONE
-                                                         |<-Reducer 15 
[CONTAINS]
-                                                            Reduce Output 
Operator [RS_43]
+                                                         |              
Statistics:Num rows: 13 Data size: 99 Basic stats: COMPLETE Column stats: NONE
+                                                         |              
TableScan [TS_0]
+                                                         |                 
alias:x
+                                                         |                 
Statistics:Num rows: 25 Data size: 191 Basic stats: COMPLETE Column stats: NONE
+                                                         |<-Map 10 [CONTAINS]
+                                                            Reduce Output 
Operator [RS_8]
                                                                key 
expressions:_col0 (type: string), _col1 (type: string)
                                                                Map-reduce 
partition columns:_col0 (type: string), _col1 (type: string)
                                                                sort order:++
-                                                               Statistics:Num 
rows: 381 Data size: 4028 Basic stats: COMPLETE Column stats: NONE
-                                                               Group By 
Operator [GBY_42]
+                                                               Statistics:Num 
rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: NONE
+                                                               Group By 
Operator [GBY_7]
                                                                   keys:_col0 
(type: string), _col1 (type: string)
                                                                   
outputColumnNames:["_col0","_col1"]
-                                                                  
Statistics:Num rows: 381 Data size: 4028 Basic stats: COMPLETE Column stats: 
NONE
-                                                                  Group By 
Operator [GBY_35]
-                                                                  |  
keys:KEY._col0 (type: string), KEY._col1 (type: string)
-                                                                  |  
outputColumnNames:["_col0","_col1"]
-                                                                  |  
Statistics:Num rows: 131 Data size: 1372 Basic stats: COMPLETE Column stats: 
NONE
-                                                                  |<-Union 14 
[SIMPLE_EDGE]
-                                                                     |<-Map 13 
[CONTAINS]
-                                                                     |  Reduce 
Output Operator [RS_34]
-                                                                     |     key 
expressions:_col0 (type: string), _col1 (type: string)
-                                                                     |     
Map-reduce partition columns:_col0 (type: string), _col1 (type: string)
-                                                                     |     
sort order:++
-                                                                     |     
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
-                                                                     |     
Group By Operator [GBY_33]
-                                                                     |        
keys:_col0 (type: string), _col1 (type: string)
-                                                                     |        
outputColumnNames:["_col0","_col1"]
-                                                                     |        
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
-                                                                     |        
Select Operator [SEL_27]
-                                                                     |         
  outputColumnNames:["_col0","_col1"]
-                                                                     |         
  Statistics:Num rows: 13 Data size: 99 Basic stats: COMPLETE Column stats: NONE
-                                                                     |         
  Filter Operator [FIL_151]
-                                                                     |         
     predicate:value is not null (type: boolean)
-                                                                     |         
     Statistics:Num rows: 13 Data size: 99 Basic stats: COMPLETE Column stats: 
NONE
-                                                                     |         
     TableScan [TS_26]
-                                                                     |         
        alias:x
-                                                                     |         
        Statistics:Num rows: 25 Data size: 191 Basic stats: COMPLETE Column 
stats: NONE
-                                                                     |<-Map 20 
[CONTAINS]
-                                                                        Reduce 
Output Operator [RS_34]
-                                                                           key 
expressions:_col0 (type: string), _col1 (type: string)
-                                                                           
Map-reduce partition columns:_col0 (type: string), _col1 (type: string)
-                                                                           
sort order:++
-                                                                           
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
-                                                                           
Group By Operator [GBY_33]
-                                                                              
keys:_col0 (type: string), _col1 (type: string)
-                                                                              
outputColumnNames:["_col0","_col1"]
-                                                                              
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
-                                                                              
Select Operator [SEL_29]
-                                                                               
  outputColumnNames:["_col0","_col1"]
-                                                                               
  Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: 
NONE
-                                                                               
  Filter Operator [FIL_152]
-                                                                               
     predicate:value is not null (type: boolean)
-                                                                               
     Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column 
stats: NONE
-                                                                               
     TableScan [TS_28]
-                                                                               
        alias:y
-                                                                               
        Statistics:Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column 
stats: NONE
+                                                                  
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
+                                                                  Select 
Operator [SEL_3]
+                                                                     
outputColumnNames:["_col0","_col1"]
+                                                                     
Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: 
NONE
+                                                                     Filter 
Operator [FIL_148]
+                                                                        
predicate:value is not null (type: boolean)
+                                                                        
Statistics:Num rows: 250 Data size: 2656 Basic stats: COMPLETE Column stats: 
NONE
+                                                                        
TableScan [TS_2]
+                                                                           
alias:y
+                                                                           
Statistics:Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: 
NONE
 
 PREHOOK: query: EXPLAIN
 SELECT x.key, z.value, y.value
@@ -1396,7 +1396,7 @@ Stage-0
          File Output Operator [FS_18]
             compressed:false
             Statistics:Num rows: 302 Data size: 3213 Basic stats: COMPLETE 
Column stats: NONE
-            
table:{"serde:":"org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe","input 
format:":"org.apache.hadoop.mapred.TextInputFormat","output 
format:":"org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat"}
+            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"}
             Select Operator [SEL_17]
                outputColumnNames:["_col0","_col1","_col2"]
                Statistics:Num rows: 302 Data size: 3213 Basic stats: COMPLETE 
Column stats: NONE
@@ -1525,7 +1525,7 @@ Stage-0
          File Output Operator [FS_69]
             compressed:false
             Statistics:Num rows: 100 Data size: 1000 Basic stats: COMPLETE 
Column stats: NONE
-            
table:{"serde:":"org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe","input 
format:":"org.apache.hadoop.mapred.TextInputFormat","output 
format:":"org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat"}
+            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"}
             Limit [LIM_68]
                Number of rows:100
                Statistics:Num rows: 100 Data size: 1000 Basic stats: COMPLETE 
Column stats: NONE
@@ -1605,7 +1605,7 @@ Stage-0
                                        Statistics:Num rows: 731 Data size: 
7775 Basic stats: COMPLETE Column stats: NONE
                                        Map Join Operator [MAPJOIN_110]
                                        |  condition map:[{"":"Inner Join 0 to 
1"}]
-                                       |  keys:{"Map 10":"_col2 (type: 
string), _col4 (type: string)","Map 3":"_col4 (type: string), _col6 (type: 
string)"}
+                                       |  keys:{"Map 3":"_col4 (type: string), 
_col6 (type: string)","Map 10":"_col2 (type: string), _col4 (type: string)"}
                                        |  
outputColumnNames:["_col2","_col3","_col14","_col15","_col17"]
                                        |  Statistics:Num rows: 731 Data size: 
7775 Basic stats: COMPLETE Column stats: NONE
                                        |<-Map 10 [BROADCAST_EDGE]
@@ -1617,7 +1617,7 @@ Stage-0
                                        |     value expressions:_col3 (type: 
string), _col5 (type: string)
                                        |     Map Join Operator [MAPJOIN_109]
                                        |     |  condition map:[{"":"Inner Join 
0 to 1"}]
-                                       |     |  keys:{"Map 10":"_col0 (type: 
string)","Map 9":"_col0 (type: string)"}
+                                       |     |  keys:{"Map 9":"_col0 (type: 
string)","Map 10":"_col0 (type: string)"}
                                        |     |  
outputColumnNames:["_col2","_col3","_col4","_col5"]
                                        |     |  Statistics:Num rows: 137 Data 
size: 1460 Basic stats: COMPLETE Column stats: NONE
                                        |     |<-Map 9 [BROADCAST_EDGE]
@@ -1755,7 +1755,7 @@ Stage-0
          File Output Operator [FS_59]
             compressed:false
             Statistics:Num rows: 275 Data size: 2921 Basic stats: COMPLETE 
Column stats: NONE
-            
table:{"serde:":"org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe","input 
format:":"org.apache.hadoop.mapred.TextInputFormat","output 
format:":"org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat"}
+            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"}
             Group By Operator [GBY_57]
             |  keys:KEY._col0 (type: string), KEY._col1 (type: string)
             |  outputColumnNames:["_col0","_col1"]
@@ -2022,7 +2022,7 @@ Stage-0
          File Output Operator [FS_119]
             compressed:false
             Statistics:Num rows: 275 Data size: 2921 Basic stats: COMPLETE 
Column stats: NONE
-            
table:{"serde:":"org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe","input 
format:":"org.apache.hadoop.mapred.TextInputFormat","output 
format:":"org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat"}
+            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"}
             Group By Operator [GBY_117]
             |  keys:KEY._col0 (type: string), KEY._col1 (type: string)
             |  outputColumnNames:["_col0","_col1"]
@@ -2043,7 +2043,7 @@ Stage-0
                |           Statistics:Num rows: 275 Data size: 2921 Basic 
stats: COMPLETE Column stats: NONE
                |           Map Join Operator [MAPJOIN_167]
                |           |  condition map:[{"":"Inner Join 0 to 1"}]
-               |           |  keys:{"Map 31":"_col0 (type: string)","Reducer 
26":"_col2 (type: string)"}
+               |           |  keys:{"Reducer 26":"_col2 (type: string)","Map 
31":"_col0 (type: string)"}
                |           |  outputColumnNames:["_col2","_col5"]
                |           |  Statistics:Num rows: 275 Data size: 2921 Basic 
stats: COMPLETE Column stats: NONE
                |           |<-Reducer 26 [BROADCAST_EDGE]
@@ -2054,7 +2054,7 @@ Stage-0
                |           |     Statistics:Num rows: 242 Data size: 2565 
Basic stats: COMPLETE Column stats: NONE
                |           |     Map Join Operator [MAPJOIN_166]
                |           |     |  condition map:[{"":"Inner Join 0 to 1"}]
-               |           |     |  keys:{"Map 30":"_col1 (type: 
string)","Reducer 26":"_col1 (type: string)"}
+               |           |     |  keys:{"Reducer 26":"_col1 (type: 
string)","Map 30":"_col1 (type: string)"}
                |           |     |  outputColumnNames:["_col2"]
                |           |     |  Statistics:Num rows: 242 Data size: 2565 
Basic stats: COMPLETE Column stats: NONE
                |           |     |<-Map 30 [BROADCAST_EDGE]
@@ -2081,7 +2081,7 @@ Stage-0
                |           |           |  outputColumnNames:["_col0","_col1"]
                |           |           |  Statistics:Num rows: 220 Data size: 
2332 Basic stats: COMPLETE Column stats: NONE
                |           |           |<-Union 25 [SIMPLE_EDGE]
-               |           |              |<-Reducer 24 [CONTAINS]
+               |           |              |<-Map 29 [CONTAINS]
                |           |              |  Reduce Output Operator [RS_94]
                |           |              |     key expressions:_col0 (type: 
string), _col1 (type: string)
                |           |              |     Map-reduce partition 
columns:_col0 (type: string), _col1 (type: string)
@@ -2091,84 +2091,16 @@ Stage-0
                |           |              |        keys:_col0 (type: string), 
_col1 (type: string)
                |           |              |        
outputColumnNames:["_col0","_col1"]
                |           |              |        Statistics:Num rows: 440 
Data size: 4664 Basic stats: COMPLETE Column stats: NONE
-               |           |              |        Group By Operator [GBY_86]
-               |           |              |        |  keys:KEY._col0 (type: 
string), KEY._col1 (type: string)
-               |           |              |        |  
outputColumnNames:["_col0","_col1"]
-               |           |              |        |  Statistics:Num rows: 190 
Data size: 2008 Basic stats: COMPLETE Column stats: NONE
-               |           |              |        |<-Union 23 [SIMPLE_EDGE]
-               |           |              |           |<-Reducer 22 [CONTAINS]
-               |           |              |           |  Reduce Output 
Operator [RS_85]
-               |           |              |           |     key 
expressions:_col0 (type: string), _col1 (type: string)
-               |           |              |           |     Map-reduce 
partition columns:_col0 (type: string), _col1 (type: string)
-               |           |              |           |     sort order:++
-               |           |              |           |     Statistics:Num 
rows: 381 Data size: 4028 Basic stats: COMPLETE Column stats: NONE
-               |           |              |           |     Group By Operator 
[GBY_84]
-               |           |              |           |        keys:_col0 
(type: string), _col1 (type: string)
-               |           |              |           |        
outputColumnNames:["_col0","_col1"]
-               |           |              |           |        Statistics:Num 
rows: 381 Data size: 4028 Basic stats: COMPLETE Column stats: NONE
-               |           |              |           |        Group By 
Operator [GBY_77]
-               |           |              |           |        |  
keys:KEY._col0 (type: string), KEY._col1 (type: string)
-               |           |              |           |        |  
outputColumnNames:["_col0","_col1"]
-               |           |              |           |        |  
Statistics:Num rows: 131 Data size: 1372 Basic stats: COMPLETE Column stats: 
NONE
-               |           |              |           |        |<-Union 21 
[SIMPLE_EDGE]
-               |           |              |           |           |<-Map 20 
[CONTAINS]
-               |           |              |           |           |  Reduce 
Output Operator [RS_76]
-               |           |              |           |           |     key 
expressions:_col0 (type: string), _col1 (type: string)
-               |           |              |           |           |     
Map-reduce partition columns:_col0 (type: string), _col1 (type: string)
-               |           |              |           |           |     sort 
order:++
-               |           |              |           |           |     
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
-               |           |              |           |           |     Group 
By Operator [GBY_75]
-               |           |              |           |           |        
keys:_col0 (type: string), _col1 (type: string)
-               |           |              |           |           |        
outputColumnNames:["_col0","_col1"]
-               |           |              |           |           |        
Statistics:Num rows: 263 Data size: 2755 Basic stats: COMPLETE Column stats: 
NONE
-               |           |              |           |           |        
Select Operator [SEL_69]
-               |           | 

<TRUNCATED>

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