http://git-wip-us.apache.org/repos/asf/hive/blob/f2c4f319/ql/src/test/results/clientpositive/llap/explainanalyze_2.q.out
----------------------------------------------------------------------
diff --git a/ql/src/test/results/clientpositive/llap/explainanalyze_2.q.out 
b/ql/src/test/results/clientpositive/llap/explainanalyze_2.q.out
index 0c6bd6a..ab86821 100644
--- a/ql/src/test/results/clientpositive/llap/explainanalyze_2.q.out
+++ b/ql/src/test/results/clientpositive/llap/explainanalyze_2.q.out
@@ -63,11 +63,11 @@ Stage-0
           Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
         <-Union 4 [SIMPLE_EDGE]
           <-Reducer 3 [CONTAINS] llap
-            Reduce Output Operator [RS_84]
+            Reduce Output Operator [RS_126]
               PartitionCols:_col0, _col1
-              Select Operator [SEL_82] (rows=66/61 width=177)
+              Select Operator [SEL_124] (rows=66/61 width=177)
                 Output:["_col0","_col1"]
-                Merge Join Operator [MERGEJOIN_81] (rows=66/61 width=177)
+                Merge Join Operator [MERGEJOIN_123] (rows=66/61 width=177)
                   Conds:RS_21._col2=RS_22._col1(Inner),Output:["_col1","_col4"]
                 <-Reducer 11 [SIMPLE_EDGE] llap
                   SHUFFLE [RS_22]
@@ -78,27 +78,27 @@ Stage-0
                         Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
                       <-Union 10 [SIMPLE_EDGE]
                         <-Map 12 [CONTAINS] llap
-                          Reduce Output Operator [RS_98]
+                          Reduce Output Operator [RS_140]
                             PartitionCols:_col1, _col0
-                            Select Operator [SEL_96] (rows=500/500 width=178)
+                            Select Operator [SEL_138] (rows=500/500 width=178)
                               Output:["_col0","_col1"]
-                              Filter Operator [FIL_95] (rows=500/500 width=178)
+                              Filter Operator [FIL_137] (rows=500/500 
width=178)
                                 predicate:value is not null
-                                TableScan [TS_94] (rows=500/500 width=178)
+                                TableScan [TS_136] (rows=500/500 width=178)
                                   Output:["key","value"]
                         <-Map 9 [CONTAINS] llap
-                          Reduce Output Operator [RS_93]
+                          Reduce Output Operator [RS_135]
                             PartitionCols:_col1, _col0
-                            Select Operator [SEL_91] (rows=25/25 width=175)
+                            Select Operator [SEL_133] (rows=25/25 width=175)
                               Output:["_col0","_col1"]
-                              Filter Operator [FIL_90] (rows=25/25 width=175)
+                              Filter Operator [FIL_132] (rows=25/25 width=175)
                                 predicate:value is not null
-                                TableScan [TS_89] (rows=25/25 width=175)
+                                TableScan [TS_131] (rows=25/25 width=175)
                                   Output:["key","value"]
                 <-Reducer 2 [SIMPLE_EDGE] llap
                   SHUFFLE [RS_21]
                     PartitionCols:_col2
-                    Merge Join Operator [MERGEJOIN_77] (rows=39/37 width=175)
+                    Merge Join Operator [MERGEJOIN_119] (rows=39/37 width=175)
                       
Conds:RS_18._col0=RS_19._col0(Inner),Output:["_col1","_col2"]
                     <-Map 1 [SIMPLE_EDGE] llap
                       SHUFFLE [RS_18]
@@ -119,11 +119,11 @@ Stage-0
                             TableScan [TS_3] (rows=25/25 width=175)
                               
default@src1,x,Tbl:COMPLETE,Col:COMPLETE,Output:["key","value"]
           <-Reducer 7 [CONTAINS] llap
-            Reduce Output Operator [RS_88]
+            Reduce Output Operator [RS_130]
               PartitionCols:_col0, _col1
-              Select Operator [SEL_86] (rows=66/61 width=177)
+              Select Operator [SEL_128] (rows=66/61 width=177)
                 Output:["_col0","_col1"]
-                Merge Join Operator [MERGEJOIN_85] (rows=66/61 width=177)
+                Merge Join Operator [MERGEJOIN_127] (rows=66/61 width=177)
                   Conds:RS_46._col2=RS_47._col1(Inner),Output:["_col1","_col4"]
                 <-Reducer 15 [SIMPLE_EDGE] llap
                   SHUFFLE [RS_47]
@@ -134,27 +134,27 @@ Stage-0
                         Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
                       <-Union 14 [SIMPLE_EDGE]
                         <-Map 13 [CONTAINS] llap
-                          Reduce Output Operator [RS_103]
+                          Reduce Output Operator [RS_145]
                             PartitionCols:_col1, _col0
-                            Select Operator [SEL_101] (rows=25/25 width=175)
+                            Select Operator [SEL_143] (rows=25/25 width=175)
                               Output:["_col0","_col1"]
-                              Filter Operator [FIL_100] (rows=25/25 width=175)
+                              Filter Operator [FIL_142] (rows=25/25 width=175)
                                 predicate:value is not null
-                                TableScan [TS_99] (rows=25/25 width=175)
+                                TableScan [TS_141] (rows=25/25 width=175)
                                   Output:["key","value"]
                         <-Map 16 [CONTAINS] llap
-                          Reduce Output Operator [RS_108]
+                          Reduce Output Operator [RS_150]
                             PartitionCols:_col1, _col0
-                            Select Operator [SEL_106] (rows=500/500 width=178)
+                            Select Operator [SEL_148] (rows=500/500 width=178)
                               Output:["_col0","_col1"]
-                              Filter Operator [FIL_105] (rows=500/500 
width=178)
+                              Filter Operator [FIL_147] (rows=500/500 
width=178)
                                 predicate:value is not null
-                                TableScan [TS_104] (rows=500/500 width=178)
+                                TableScan [TS_146] (rows=500/500 width=178)
                                   Output:["key","value"]
                 <-Reducer 6 [SIMPLE_EDGE] llap
                   SHUFFLE [RS_46]
                     PartitionCols:_col2
-                    Merge Join Operator [MERGEJOIN_78] (rows=39/37 width=175)
+                    Merge Join Operator [MERGEJOIN_120] (rows=39/37 width=175)
                       
Conds:RS_43._col0=RS_44._col0(Inner),Output:["_col1","_col2"]
                     <-Map 1 [SIMPLE_EDGE] llap
                       SHUFFLE [RS_43]
@@ -257,17 +257,17 @@ Stage-0
           Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
         <-Union 6 [SIMPLE_EDGE]
           <-Reducer 5 [CONTAINS] llap
-            Reduce Output Operator [RS_163]
+            Reduce Output Operator [RS_229]
               PartitionCols:_col0, _col1
-              Group By Operator [GBY_161] (rows=196/15 width=177)
+              Group By Operator [GBY_227] (rows=196/15 width=177)
                 Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
               <-Union 4 [SIMPLE_EDGE]
                 <-Reducer 10 [CONTAINS] llap
-                  Reduce Output Operator [RS_171]
+                  Reduce Output Operator [RS_237]
                     PartitionCols:_col0, _col1
-                    Select Operator [SEL_169] (rows=130/61 width=177)
+                    Select Operator [SEL_235] (rows=130/61 width=177)
                       Output:["_col0","_col1"]
-                      Merge Join Operator [MERGEJOIN_168] (rows=130/61 
width=177)
+                      Merge Join Operator [MERGEJOIN_234] (rows=130/61 
width=177)
                         
Conds:RS_55._col3=RS_56._col1(Inner),Output:["_col1","_col2"]
                       <-Reducer 20 [SIMPLE_EDGE] llap
                         SHUFFLE [RS_56]
@@ -278,44 +278,44 @@ Stage-0
                               Output:["_col0","_col1"],keys:KEY._col0, 
KEY._col1
                             <-Union 19 [SIMPLE_EDGE]
                               <-Map 22 [CONTAINS] llap
-                                Reduce Output Operator [RS_200]
+                                Reduce Output Operator [RS_266]
                                   PartitionCols:_col1, _col0
-                                  Select Operator [SEL_198] (rows=500/500 
width=178)
+                                  Select Operator [SEL_264] (rows=500/500 
width=178)
                                     Output:["_col0","_col1"]
-                                    Filter Operator [FIL_197] (rows=500/500 
width=178)
+                                    Filter Operator [FIL_263] (rows=500/500 
width=178)
                                       predicate:value is not null
-                                      TableScan [TS_196] (rows=500/500 
width=178)
+                                      TableScan [TS_262] (rows=500/500 
width=178)
                                         Output:["key","value"]
                               <-Reducer 18 [CONTAINS] llap
-                                Reduce Output Operator [RS_190]
+                                Reduce Output Operator [RS_256]
                                   PartitionCols:_col1, _col0
-                                  Select Operator [SEL_188] (rows=525/319 
width=178)
+                                  Select Operator [SEL_254] (rows=525/319 
width=178)
                                     Output:["_col0","_col1"]
-                                    Group By Operator [GBY_187] (rows=525/319 
width=178)
+                                    Group By Operator [GBY_253] (rows=525/319 
width=178)
                                       Output:["_col0","_col1"],keys:KEY._col0, 
KEY._col1
                                     <-Union 17 [SIMPLE_EDGE]
                                       <-Map 16 [CONTAINS] llap
-                                        Reduce Output Operator [RS_186]
+                                        Reduce Output Operator [RS_252]
                                           PartitionCols:_col1, _col0
-                                          Select Operator [SEL_184] 
(rows=25/25 width=175)
+                                          Select Operator [SEL_250] 
(rows=25/25 width=175)
                                             Output:["_col0","_col1"]
-                                            Filter Operator [FIL_183] 
(rows=25/25 width=175)
+                                            Filter Operator [FIL_249] 
(rows=25/25 width=175)
                                               predicate:value is not null
-                                              TableScan [TS_182] (rows=25/25 
width=175)
+                                              TableScan [TS_248] (rows=25/25 
width=175)
                                                 Output:["key","value"]
                                       <-Map 21 [CONTAINS] llap
-                                        Reduce Output Operator [RS_195]
+                                        Reduce Output Operator [RS_261]
                                           PartitionCols:_col1, _col0
-                                          Select Operator [SEL_193] 
(rows=500/500 width=178)
+                                          Select Operator [SEL_259] 
(rows=500/500 width=178)
                                             Output:["_col0","_col1"]
-                                            Filter Operator [FIL_192] 
(rows=500/500 width=178)
+                                            Filter Operator [FIL_258] 
(rows=500/500 width=178)
                                               predicate:value is not null
-                                              TableScan [TS_191] (rows=500/500 
width=178)
+                                              TableScan [TS_257] (rows=500/500 
width=178)
                                                 Output:["key","value"]
                       <-Reducer 9 [SIMPLE_EDGE] llap
                         SHUFFLE [RS_55]
                           PartitionCols:_col3
-                          Merge Join Operator [MERGEJOIN_152] (rows=39/37 
width=266)
+                          Merge Join Operator [MERGEJOIN_218] (rows=39/37 
width=266)
                             
Conds:RS_52._col0=RS_53._col0(Inner),Output:["_col1","_col2","_col3"]
                           <-Map 1 [SIMPLE_EDGE] llap
                             SHUFFLE [RS_52]
@@ -336,16 +336,16 @@ Stage-0
                                   TableScan [TS_3] (rows=25/25 width=175)
                                     
default@src1,x,Tbl:COMPLETE,Col:COMPLETE,Output:["key","value"]
                 <-Reducer 3 [CONTAINS] llap
-                  Reduce Output Operator [RS_160]
+                  Reduce Output Operator [RS_226]
                     PartitionCols:_col0, _col1
-                    Select Operator [SEL_158] (rows=66/61 width=177)
+                    Select Operator [SEL_224] (rows=66/61 width=177)
                       Output:["_col0","_col1"]
-                      Merge Join Operator [MERGEJOIN_157] (rows=66/61 
width=177)
+                      Merge Join Operator [MERGEJOIN_223] (rows=66/61 
width=177)
                         
Conds:RS_21._col3=RS_22._col1(Inner),Output:["_col1","_col2"]
                       <-Reducer 2 [SIMPLE_EDGE] llap
                         SHUFFLE [RS_21]
                           PartitionCols:_col3
-                          Merge Join Operator [MERGEJOIN_151] (rows=39/37 
width=266)
+                          Merge Join Operator [MERGEJOIN_217] (rows=39/37 
width=266)
                             
Conds:RS_18._col0=RS_19._col0(Inner),Output:["_col1","_col2","_col3"]
                           <-Map 1 [SIMPLE_EDGE] llap
                             SHUFFLE [RS_18]
@@ -364,34 +364,34 @@ Stage-0
                               Output:["_col0","_col1"],keys:KEY._col0, 
KEY._col1
                             <-Union 13 [SIMPLE_EDGE]
                               <-Map 12 [CONTAINS] llap
-                                Reduce Output Operator [RS_176]
+                                Reduce Output Operator [RS_242]
                                   PartitionCols:_col1, _col0
-                                  Select Operator [SEL_174] (rows=25/25 
width=175)
+                                  Select Operator [SEL_240] (rows=25/25 
width=175)
                                     Output:["_col0","_col1"]
-                                    Filter Operator [FIL_173] (rows=25/25 
width=175)
+                                    Filter Operator [FIL_239] (rows=25/25 
width=175)
                                       predicate:value is not null
-                                      TableScan [TS_172] (rows=25/25 width=175)
+                                      TableScan [TS_238] (rows=25/25 width=175)
                                         Output:["key","value"]
                               <-Map 15 [CONTAINS] llap
-                                Reduce Output Operator [RS_181]
+                                Reduce Output Operator [RS_247]
                                   PartitionCols:_col1, _col0
-                                  Select Operator [SEL_179] (rows=500/500 
width=178)
+                                  Select Operator [SEL_245] (rows=500/500 
width=178)
                                     Output:["_col0","_col1"]
-                                    Filter Operator [FIL_178] (rows=500/500 
width=178)
+                                    Filter Operator [FIL_244] (rows=500/500 
width=178)
                                       predicate:value is not null
-                                      TableScan [TS_177] (rows=500/500 
width=178)
+                                      TableScan [TS_243] (rows=500/500 
width=178)
                                         Output:["key","value"]
           <-Reducer 8 [CONTAINS] llap
-            Reduce Output Operator [RS_167]
+            Reduce Output Operator [RS_233]
               PartitionCols:_col0, _col1
-              Select Operator [SEL_165] (rows=193/61 width=177)
+              Select Operator [SEL_231] (rows=193/61 width=177)
                 Output:["_col0","_col1"]
-                Merge Join Operator [MERGEJOIN_164] (rows=193/61 width=177)
+                Merge Join Operator [MERGEJOIN_230] (rows=193/61 width=177)
                   
Conds:RS_104._col3=RS_105._col1(Inner),Output:["_col1","_col2"]
                 <-Reducer 2 [SIMPLE_EDGE] llap
                   SHUFFLE [RS_104]
                     PartitionCols:_col3
-                     Please refer to the previous Merge Join Operator 
[MERGEJOIN_151]
+                     Please refer to the previous Merge Join Operator 
[MERGEJOIN_217]
                 <-Reducer 29 [SIMPLE_EDGE] llap
                   SHUFFLE [RS_105]
                     PartitionCols:_col1
@@ -401,56 +401,56 @@ Stage-0
                         Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
                       <-Union 28 [SIMPLE_EDGE]
                         <-Map 32 [CONTAINS] llap
-                          Reduce Output Operator [RS_228]
+                          Reduce Output Operator [RS_294]
                             PartitionCols:_col1, _col0
-                            Select Operator [SEL_226] (rows=500/500 width=178)
+                            Select Operator [SEL_292] (rows=500/500 width=178)
                               Output:["_col0","_col1"]
-                              Filter Operator [FIL_225] (rows=500/500 
width=178)
+                              Filter Operator [FIL_291] (rows=500/500 
width=178)
                                 predicate:value is not null
-                                TableScan [TS_224] (rows=500/500 width=178)
+                                TableScan [TS_290] (rows=500/500 width=178)
                                   Output:["key","value"]
                         <-Reducer 27 [CONTAINS] llap
-                          Reduce Output Operator [RS_213]
+                          Reduce Output Operator [RS_279]
                             PartitionCols:_col1, _col0
-                            Select Operator [SEL_211] (rows=1025/319 width=178)
+                            Select Operator [SEL_277] (rows=1025/319 width=178)
                               Output:["_col0","_col1"]
-                              Group By Operator [GBY_210] (rows=1025/319 
width=178)
+                              Group By Operator [GBY_276] (rows=1025/319 
width=178)
                                 Output:["_col0","_col1"],keys:KEY._col0, 
KEY._col1
                               <-Union 26 [SIMPLE_EDGE]
                                 <-Map 31 [CONTAINS] llap
-                                  Reduce Output Operator [RS_223]
+                                  Reduce Output Operator [RS_289]
                                     PartitionCols:_col1, _col0
-                                    Select Operator [SEL_221] (rows=500/500 
width=178)
+                                    Select Operator [SEL_287] (rows=500/500 
width=178)
                                       Output:["_col0","_col1"]
-                                      Filter Operator [FIL_220] (rows=500/500 
width=178)
+                                      Filter Operator [FIL_286] (rows=500/500 
width=178)
                                         predicate:value is not null
-                                        TableScan [TS_219] (rows=500/500 
width=178)
+                                        TableScan [TS_285] (rows=500/500 
width=178)
                                           Output:["key","value"]
                                 <-Reducer 25 [CONTAINS] llap
-                                  Reduce Output Operator [RS_209]
+                                  Reduce Output Operator [RS_275]
                                     PartitionCols:_col1, _col0
-                                    Select Operator [SEL_207] (rows=525/319 
width=178)
+                                    Select Operator [SEL_273] (rows=525/319 
width=178)
                                       Output:["_col0","_col1"]
-                                      Group By Operator [GBY_206] 
(rows=525/319 width=178)
+                                      Group By Operator [GBY_272] 
(rows=525/319 width=178)
                                         
Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
                                       <-Union 24 [SIMPLE_EDGE]
                                         <-Map 23 [CONTAINS] llap
-                                          Reduce Output Operator [RS_205]
+                                          Reduce Output Operator [RS_271]
                                             PartitionCols:_col1, _col0
-                                            Select Operator [SEL_203] 
(rows=25/25 width=175)
+                                            Select Operator [SEL_269] 
(rows=25/25 width=175)
                                               Output:["_col0","_col1"]
-                                              Filter Operator [FIL_202] 
(rows=25/25 width=175)
+                                              Filter Operator [FIL_268] 
(rows=25/25 width=175)
                                                 predicate:value is not null
-                                                TableScan [TS_201] (rows=25/25 
width=175)
+                                                TableScan [TS_267] (rows=25/25 
width=175)
                                                   Output:["key","value"]
                                         <-Map 30 [CONTAINS] llap
-                                          Reduce Output Operator [RS_218]
+                                          Reduce Output Operator [RS_284]
                                             PartitionCols:_col1, _col0
-                                            Select Operator [SEL_216] 
(rows=500/500 width=178)
+                                            Select Operator [SEL_282] 
(rows=500/500 width=178)
                                               Output:["_col0","_col1"]
-                                              Filter Operator [FIL_215] 
(rows=500/500 width=178)
+                                              Filter Operator [FIL_281] 
(rows=500/500 width=178)
                                                 predicate:value is not null
-                                                TableScan [TS_214] 
(rows=500/500 width=178)
+                                                TableScan [TS_280] 
(rows=500/500 width=178)
                                                   Output:["key","value"]
 
 PREHOOK: query: CREATE TABLE srcbucket_mapjoin_n11(key int, value string) 
partitioned by (ds string) CLUSTERED BY (key) INTO 2 BUCKETS STORED AS TEXTFILE
@@ -609,7 +609,7 @@ Stage-0
     Stage-1
       Map 1 llap
       File Output Operator [FS_10]
-        Merge Join Operator [MERGEJOIN_15] (rows=401/480 width=95)
+        Merge Join Operator [MERGEJOIN_25] (rows=401/480 width=95)
           Conds:SEL_2._col0=SEL_5._col0(Inner),Output:["_col0","_col1"]
         <-Select Operator [SEL_5] (rows=242/242 width=4)
             Output:["_col0"]
@@ -652,7 +652,7 @@ Stage-0
     Stage-1
       Reducer 3 llap
       File Output Operator [FS_16]
-        Merge Join Operator [MERGEJOIN_26] (rows=633/1166 width=95)
+        Merge Join Operator [MERGEJOIN_46] (rows=633/1166 width=95)
           Conds:RS_12._col0=RS_13._col0(Inner),Output:["_col0","_col1"]
         <-Map 5 [SIMPLE_EDGE] llap
           SHUFFLE [RS_13]
@@ -666,7 +666,7 @@ Stage-0
         <-Reducer 2 [SIMPLE_EDGE] llap
           SHUFFLE [RS_12]
             PartitionCols:_col0
-            Merge Join Operator [MERGEJOIN_25] (rows=382/480 width=95)
+            Merge Join Operator [MERGEJOIN_45] (rows=382/480 width=95)
               Conds:RS_9._col1=RS_10._col0(Inner),Output:["_col0","_col1"]
             <-Map 1 [SIMPLE_EDGE] llap
               SHUFFLE [RS_9]
@@ -715,7 +715,7 @@ Stage-0
     Stage-1
       Map 1 llap
       File Output Operator [FS_10]
-        Merge Join Operator [MERGEJOIN_15] (rows=401/480 width=95)
+        Merge Join Operator [MERGEJOIN_25] (rows=401/480 width=95)
           Conds:SEL_2._col0=SEL_5._col0(Inner),Output:["_col0","_col1"]
         <-Select Operator [SEL_5] (rows=242/242 width=4)
             Output:["_col0"]
@@ -762,7 +762,7 @@ Stage-0
     Stage-1
       Reducer 3 llap
       File Output Operator [FS_16]
-        Merge Join Operator [MERGEJOIN_26] (rows=633/1166 width=95)
+        Merge Join Operator [MERGEJOIN_46] (rows=633/1166 width=95)
           Conds:RS_12._col0=RS_13._col0(Inner),Output:["_col0","_col1"]
         <-Map 5 [SIMPLE_EDGE] llap
           SHUFFLE [RS_13]
@@ -776,7 +776,7 @@ Stage-0
         <-Reducer 2 [SIMPLE_EDGE] llap
           SHUFFLE [RS_12]
             PartitionCols:_col0
-            Merge Join Operator [MERGEJOIN_25] (rows=382/480 width=95)
+            Merge Join Operator [MERGEJOIN_45] (rows=382/480 width=95)
               Conds:RS_9._col1=RS_10._col0(Inner),Output:["_col0","_col1"]
             <-Map 1 [SIMPLE_EDGE] llap
               SHUFFLE [RS_9]
@@ -847,7 +847,7 @@ Stage-0
           Output:["_col0"],aggregations:["count()"]
         <-Reducer 3 [CUSTOM_SIMPLE_EDGE] llap
           PARTITION_ONLY_SHUFFLE [RS_22]
-            Merge Join Operator [MERGEJOIN_38] (rows=1061/1646 width=8)
+            Merge Join Operator [MERGEJOIN_60] (rows=1061/1646 width=8)
               Conds:Union 2._col0=RS_19._col0(Inner)
             <-Map 7 [SIMPLE_EDGE] llap
               SHUFFLE [RS_19]
@@ -860,30 +860,30 @@ Stage-0
                       
default@tab_part_n7,b_n10,Tbl:COMPLETE,Col:COMPLETE,Output:["key"]
             <-Union 2 [SIMPLE_EDGE]
               <-Map 1 [CONTAINS] llap
-                Reduce Output Operator [RS_48]
+                Reduce Output Operator [RS_70]
                   PartitionCols:_col0
-                  Merge Join Operator [MERGEJOIN_45] (rows=401/480 width=4)
-                    Conds:SEL_43._col0=SEL_5._col0(Inner),Output:["_col0"]
+                  Merge Join Operator [MERGEJOIN_67] (rows=401/480 width=4)
+                    Conds:SEL_65._col0=SEL_5._col0(Inner),Output:["_col0"]
                   <-Select Operator [SEL_5] (rows=242/242 width=4)
                       Output:["_col0"]
                       Filter Operator [FIL_33] (rows=242/242 width=4)
                         predicate:key is not null
                         TableScan [TS_3] (rows=242/242 width=4)
                           
default@tab_n6,s3,Tbl:COMPLETE,Col:COMPLETE,Output:["key"]
-                  <-Select Operator [SEL_43] (rows=242/242 width=4)
+                  <-Select Operator [SEL_65] (rows=242/242 width=4)
                       Output:["_col0"]
-                      Filter Operator [FIL_41] (rows=242/242 width=4)
+                      Filter Operator [FIL_63] (rows=242/242 width=4)
                         predicate:key is not null
-                        TableScan [TS_39] (rows=242/242 width=4)
+                        TableScan [TS_61] (rows=242/242 width=4)
                           Output:["key"]
               <-Map 6 [CONTAINS] llap
-                Reduce Output Operator [RS_53]
+                Reduce Output Operator [RS_75]
                   PartitionCols:_col0
-                  Select Operator [SEL_51] (rows=242/242 width=4)
+                  Select Operator [SEL_73] (rows=242/242 width=4)
                     Output:["_col0"]
-                    Filter Operator [FIL_50] (rows=242/242 width=4)
+                    Filter Operator [FIL_72] (rows=242/242 width=4)
                       predicate:key is not null
-                      TableScan [TS_49] (rows=242/242 width=4)
+                      TableScan [TS_71] (rows=242/242 width=4)
                         Output:["key"]
 
 PREHOOK: query: select count(*) from (select s1.key as key, s1.value as value 
from tab_n6 s1 join tab_n6 s3 on s1.key=s3.key join tab_n6 s2 on 
s1.value=s2.value
@@ -937,7 +937,7 @@ Stage-0
           Output:["_col0"],aggregations:["count()"]
         <-Reducer 5 [CUSTOM_SIMPLE_EDGE] llap
           PARTITION_ONLY_SHUFFLE [RS_28]
-            Merge Join Operator [MERGEJOIN_49] (rows=1443/3768 width=8)
+            Merge Join Operator [MERGEJOIN_81] (rows=1443/3768 width=8)
               Conds:Union 4._col0=RS_25._col0(Inner)
             <-Map 10 [SIMPLE_EDGE] llap
               SHUFFLE [RS_25]
@@ -950,18 +950,18 @@ Stage-0
                       
default@tab_part_n7,b_n10,Tbl:COMPLETE,Col:COMPLETE,Output:["key"]
             <-Union 4 [SIMPLE_EDGE]
               <-Map 9 [CONTAINS] llap
-                Reduce Output Operator [RS_57]
+                Reduce Output Operator [RS_89]
                   PartitionCols:_col0
-                  Select Operator [SEL_55] (rows=242/242 width=4)
+                  Select Operator [SEL_87] (rows=242/242 width=4)
                     Output:["_col0"]
-                    Filter Operator [FIL_54] (rows=242/242 width=4)
+                    Filter Operator [FIL_86] (rows=242/242 width=4)
                       predicate:key is not null
-                      TableScan [TS_53] (rows=242/242 width=4)
+                      TableScan [TS_85] (rows=242/242 width=4)
                         Output:["key"]
               <-Reducer 3 [CONTAINS] llap
-                Reduce Output Operator [RS_52]
+                Reduce Output Operator [RS_84]
                   PartitionCols:_col0
-                  Merge Join Operator [MERGEJOIN_50] (rows=633/1166 width=4)
+                  Merge Join Operator [MERGEJOIN_82] (rows=633/1166 width=4)
                     Conds:RS_12._col0=RS_13._col0(Inner),Output:["_col0"]
                   <-Map 8 [SIMPLE_EDGE] llap
                     SHUFFLE [RS_13]
@@ -975,7 +975,7 @@ Stage-0
                   <-Reducer 2 [SIMPLE_EDGE] llap
                     SHUFFLE [RS_12]
                       PartitionCols:_col0
-                      Merge Join Operator [MERGEJOIN_47] (rows=382/480 width=4)
+                      Merge Join Operator [MERGEJOIN_79] (rows=382/480 width=4)
                         Conds:RS_9._col1=RS_10._col0(Inner),Output:["_col0"]
                       <-Map 1 [SIMPLE_EDGE] llap
                         SHUFFLE [RS_9]
@@ -1140,16 +1140,16 @@ Stage-5
                   
Output:["_col0","_col1"],aggregations:["compute_stats(VALUE._col0, 
'hll')","compute_stats(VALUE._col2, 'hll')"]
                 <-Union 4 [CUSTOM_SIMPLE_EDGE]
                   <-Reducer 12 [CONTAINS] llap
-                    File Output Operator [FS_167]
+                    File Output Operator [FS_233]
                       table:{"name:":"default.a_n14"}
-                      Select Operator [SEL_165] (rows=193/820 width=175)
+                      Select Operator [SEL_231] (rows=193/820 width=175)
                         Output:["_col0","_col1"]
-                        Merge Join Operator [MERGEJOIN_164] (rows=193/820 
width=175)
+                        Merge Join Operator [MERGEJOIN_230] (rows=193/820 
width=175)
                           Conds:RS_69._col1=Union 
23._col0(Inner),Output:["_col0","_col3"]
                         <-Reducer 11 [SIMPLE_EDGE] llap
                           SHUFFLE [RS_69]
                             PartitionCols:_col1
-                            Merge Join Operator [MERGEJOIN_136] (rows=39/115 
width=264)
+                            Merge Join Operator [MERGEJOIN_202] (rows=39/115 
width=264)
                               
Conds:RS_66._col0=RS_67._col0(Inner),Output:["_col0","_col1","_col3"]
                             <-Map 10 [SIMPLE_EDGE] llap
                               SHUFFLE [RS_66]
@@ -1171,70 +1171,70 @@ Stage-5
                                       
default@src1,y,Tbl:COMPLETE,Col:COMPLETE,Output:["key","value"]
                         <-Union 23 [SIMPLE_EDGE]
                           <-Map 22 [CONTAINS] llap
-                            Reduce Output Operator [RS_205]
+                            Reduce Output Operator [RS_271]
                               PartitionCols:_col0
-                              Select Operator [SEL_203] (rows=25/25 width=89)
+                              Select Operator [SEL_269] (rows=25/25 width=89)
                                 Output:["_col0"]
-                                Filter Operator [FIL_202] (rows=25/25 width=89)
+                                Filter Operator [FIL_268] (rows=25/25 width=89)
                                   predicate:value is not null
-                                  TableScan [TS_201] (rows=25/25 width=89)
+                                  TableScan [TS_267] (rows=25/25 width=89)
                                     Output:["value"]
                           <-Map 24 [CONTAINS] llap
-                            Reduce Output Operator [RS_210]
+                            Reduce Output Operator [RS_276]
                               PartitionCols:_col0
-                              Select Operator [SEL_208] (rows=500/500 width=91)
+                              Select Operator [SEL_274] (rows=500/500 width=91)
                                 Output:["_col0"]
-                                Filter Operator [FIL_207] (rows=500/500 
width=91)
+                                Filter Operator [FIL_273] (rows=500/500 
width=91)
                                   predicate:value is not null
-                                  TableScan [TS_206] (rows=500/500 width=91)
+                                  TableScan [TS_272] (rows=500/500 width=91)
                                     Output:["value"]
                           <-Map 25 [CONTAINS] llap
-                            Reduce Output Operator [RS_215]
+                            Reduce Output Operator [RS_281]
                               PartitionCols:_col0
-                              Select Operator [SEL_213] (rows=500/500 width=91)
+                              Select Operator [SEL_279] (rows=500/500 width=91)
                                 Output:["_col0"]
-                                Filter Operator [FIL_212] (rows=500/500 
width=91)
+                                Filter Operator [FIL_278] (rows=500/500 
width=91)
                                   predicate:value is not null
-                                  TableScan [TS_211] (rows=500/500 width=91)
+                                  TableScan [TS_277] (rows=500/500 width=91)
                                     Output:["value"]
                           <-Map 26 [CONTAINS] llap
-                            Reduce Output Operator [RS_220]
+                            Reduce Output Operator [RS_286]
                               PartitionCols:_col0
-                              Select Operator [SEL_218] (rows=500/500 width=91)
+                              Select Operator [SEL_284] (rows=500/500 width=91)
                                 Output:["_col0"]
-                                Filter Operator [FIL_217] (rows=500/500 
width=91)
+                                Filter Operator [FIL_283] (rows=500/500 
width=91)
                                   predicate:value is not null
-                                  TableScan [TS_216] (rows=500/500 width=91)
+                                  TableScan [TS_282] (rows=500/500 width=91)
                                     Output:["value"]
-                    Reduce Output Operator [RS_173]
-                      Select Operator [SEL_168] (rows=2899/820 width=178)
+                    Reduce Output Operator [RS_239]
+                      Select Operator [SEL_234] (rows=2899/820 width=178)
                         Output:["key","value"]
-                         Please refer to the previous Select Operator [SEL_165]
-                    File Output Operator [FS_169]
+                         Please refer to the previous Select Operator [SEL_231]
+                    File Output Operator [FS_235]
                       table:{"name:":"default.b_n10"}
-                       Please refer to the previous Select Operator [SEL_165]
-                    Reduce Output Operator [RS_174]
-                      Select Operator [SEL_170] (rows=2899/820 width=178)
+                       Please refer to the previous Select Operator [SEL_231]
+                    Reduce Output Operator [RS_240]
+                      Select Operator [SEL_236] (rows=2899/820 width=178)
                         Output:["key","value"]
-                         Please refer to the previous Select Operator [SEL_165]
-                    File Output Operator [FS_171]
+                         Please refer to the previous Select Operator [SEL_231]
+                    File Output Operator [FS_237]
                       table:{"name:":"default.c_n3"}
-                       Please refer to the previous Select Operator [SEL_165]
-                    Reduce Output Operator [RS_175]
-                      Select Operator [SEL_172] (rows=2899/820 width=178)
+                       Please refer to the previous Select Operator [SEL_231]
+                    Reduce Output Operator [RS_241]
+                      Select Operator [SEL_238] (rows=2899/820 width=178)
                         Output:["key","value"]
-                         Please refer to the previous Select Operator [SEL_165]
+                         Please refer to the previous Select Operator [SEL_231]
                   <-Reducer 3 [CONTAINS] llap
-                    File Output Operator [FS_143]
+                    File Output Operator [FS_209]
                       table:{"name:":"default.a_n14"}
-                      Select Operator [SEL_141] (rows=66/170 width=177)
+                      Select Operator [SEL_207] (rows=66/170 width=177)
                         Output:["_col0","_col1"]
-                        Merge Join Operator [MERGEJOIN_140] (rows=66/170 
width=177)
+                        Merge Join Operator [MERGEJOIN_206] (rows=66/170 
width=177)
                           Conds:RS_17._col3=Union 
14._col0(Inner),Output:["_col1","_col2"]
                         <-Reducer 2 [SIMPLE_EDGE] llap
                           SHUFFLE [RS_17]
                             PartitionCols:_col3
-                            Merge Join Operator [MERGEJOIN_134] (rows=39/37 
width=266)
+                            Merge Join Operator [MERGEJOIN_200] (rows=39/37 
width=266)
                               
Conds:RS_14._col0=RS_15._col0(Inner),Output:["_col1","_col2","_col3"]
                             <-Map 1 [SIMPLE_EDGE] llap
                               SHUFFLE [RS_14]
@@ -1251,52 +1251,52 @@ Stage-5
                                  Please refer to the previous Select Operator 
[SEL_5]
                         <-Union 14 [SIMPLE_EDGE]
                           <-Map 13 [CONTAINS] llap
-                            Reduce Output Operator [RS_180]
+                            Reduce Output Operator [RS_246]
                               PartitionCols:_col0
-                              Select Operator [SEL_178] (rows=25/25 width=89)
+                              Select Operator [SEL_244] (rows=25/25 width=89)
                                 Output:["_col0"]
-                                Filter Operator [FIL_177] (rows=25/25 width=89)
+                                Filter Operator [FIL_243] (rows=25/25 width=89)
                                   predicate:value is not null
-                                  TableScan [TS_176] (rows=25/25 width=89)
+                                  TableScan [TS_242] (rows=25/25 width=89)
                                     Output:["value"]
                           <-Map 15 [CONTAINS] llap
-                            Reduce Output Operator [RS_185]
+                            Reduce Output Operator [RS_251]
                               PartitionCols:_col0
-                              Select Operator [SEL_183] (rows=500/500 width=91)
+                              Select Operator [SEL_249] (rows=500/500 width=91)
                                 Output:["_col0"]
-                                Filter Operator [FIL_182] (rows=500/500 
width=91)
+                                Filter Operator [FIL_248] (rows=500/500 
width=91)
                                   predicate:value is not null
-                                  TableScan [TS_181] (rows=500/500 width=91)
+                                  TableScan [TS_247] (rows=500/500 width=91)
                                     Output:["value"]
-                    Reduce Output Operator [RS_149]
-                      Select Operator [SEL_144] (rows=2899/170 width=178)
+                    Reduce Output Operator [RS_215]
+                      Select Operator [SEL_210] (rows=2899/170 width=178)
                         Output:["key","value"]
-                         Please refer to the previous Select Operator [SEL_141]
-                    File Output Operator [FS_145]
+                         Please refer to the previous Select Operator [SEL_207]
+                    File Output Operator [FS_211]
                       table:{"name:":"default.b_n10"}
-                       Please refer to the previous Select Operator [SEL_141]
-                    Reduce Output Operator [RS_150]
-                      Select Operator [SEL_146] (rows=2899/170 width=178)
+                       Please refer to the previous Select Operator [SEL_207]
+                    Reduce Output Operator [RS_216]
+                      Select Operator [SEL_212] (rows=2899/170 width=178)
                         Output:["key","value"]
-                         Please refer to the previous Select Operator [SEL_141]
-                    File Output Operator [FS_147]
+                         Please refer to the previous Select Operator [SEL_207]
+                    File Output Operator [FS_213]
                       table:{"name:":"default.c_n3"}
-                       Please refer to the previous Select Operator [SEL_141]
-                    Reduce Output Operator [RS_151]
-                      Select Operator [SEL_148] (rows=2899/170 width=178)
+                       Please refer to the previous Select Operator [SEL_207]
+                    Reduce Output Operator [RS_217]
+                      Select Operator [SEL_214] (rows=2899/170 width=178)
                         Output:["key","value"]
-                         Please refer to the previous Select Operator [SEL_141]
+                         Please refer to the previous Select Operator [SEL_207]
                   <-Reducer 9 [CONTAINS] llap
-                    File Output Operator [FS_155]
+                    File Output Operator [FS_221]
                       table:{"name:":"default.a_n14"}
-                      Select Operator [SEL_153] (rows=2640/5421 width=178)
+                      Select Operator [SEL_219] (rows=2640/5421 width=178)
                         Output:["_col0","_col1"]
-                        Merge Join Operator [MERGEJOIN_152] (rows=2640/5421 
width=178)
+                        Merge Join Operator [MERGEJOIN_218] (rows=2640/5421 
width=178)
                           Conds:RS_41._col1=Union 
18._col0(Inner),Output:["_col0","_col3"]
                         <-Reducer 8 [SIMPLE_EDGE] llap
                           SHUFFLE [RS_41]
                             PartitionCols:_col1
-                            Merge Join Operator [MERGEJOIN_135] (rows=791/1028 
width=269)
+                            Merge Join Operator [MERGEJOIN_201] (rows=791/1028 
width=269)
                               
Conds:RS_38._col0=RS_39._col0(Inner),Output:["_col0","_col1","_col3"]
                             <-Map 1 [SIMPLE_EDGE] llap
                               SHUFFLE [RS_38]
@@ -1317,50 +1317,50 @@ Stage-5
                                       
default@src,y,Tbl:COMPLETE,Col:COMPLETE,Output:["key","value"]
                         <-Union 18 [SIMPLE_EDGE]
                           <-Map 17 [CONTAINS] llap
-                            Reduce Output Operator [RS_190]
+                            Reduce Output Operator [RS_256]
                               PartitionCols:_col0
-                              Select Operator [SEL_188] (rows=25/25 width=89)
+                              Select Operator [SEL_254] (rows=25/25 width=89)
                                 Output:["_col0"]
-                                Filter Operator [FIL_187] (rows=25/25 width=89)
+                                Filter Operator [FIL_253] (rows=25/25 width=89)
                                   predicate:value is not null
-                                  TableScan [TS_186] (rows=25/25 width=89)
+                                  TableScan [TS_252] (rows=25/25 width=89)
                                     Output:["value"]
                           <-Map 19 [CONTAINS] llap
-                            Reduce Output Operator [RS_195]
+                            Reduce Output Operator [RS_261]
                               PartitionCols:_col0
-                              Select Operator [SEL_193] (rows=500/500 width=91)
+                              Select Operator [SEL_259] (rows=500/500 width=91)
                                 Output:["_col0"]
-                                Filter Operator [FIL_192] (rows=500/500 
width=91)
+                                Filter Operator [FIL_258] (rows=500/500 
width=91)
                                   predicate:value is not null
-                                  TableScan [TS_191] (rows=500/500 width=91)
+                                  TableScan [TS_257] (rows=500/500 width=91)
                                     Output:["value"]
                           <-Map 20 [CONTAINS] llap
-                            Reduce Output Operator [RS_200]
+                            Reduce Output Operator [RS_266]
                               PartitionCols:_col0
-                              Select Operator [SEL_198] (rows=500/500 width=91)
+                              Select Operator [SEL_264] (rows=500/500 width=91)
                                 Output:["_col0"]
-                                Filter Operator [FIL_197] (rows=500/500 
width=91)
+                                Filter Operator [FIL_263] (rows=500/500 
width=91)
                                   predicate:value is not null
-                                  TableScan [TS_196] (rows=500/500 width=91)
+                                  TableScan [TS_262] (rows=500/500 width=91)
                                     Output:["value"]
-                    Reduce Output Operator [RS_161]
-                      Select Operator [SEL_156] (rows=2899/5421 width=178)
+                    Reduce Output Operator [RS_227]
+                      Select Operator [SEL_222] (rows=2899/5421 width=178)
                         Output:["key","value"]
-                         Please refer to the previous Select Operator [SEL_153]
-                    File Output Operator [FS_157]
+                         Please refer to the previous Select Operator [SEL_219]
+                    File Output Operator [FS_223]
                       table:{"name:":"default.b_n10"}
-                       Please refer to the previous Select Operator [SEL_153]
-                    Reduce Output Operator [RS_162]
-                      Select Operator [SEL_158] (rows=2899/5421 width=178)
+                       Please refer to the previous Select Operator [SEL_219]
+                    Reduce Output Operator [RS_228]
+                      Select Operator [SEL_224] (rows=2899/5421 width=178)
                         Output:["key","value"]
-                         Please refer to the previous Select Operator [SEL_153]
-                    File Output Operator [FS_159]
+                         Please refer to the previous Select Operator [SEL_219]
+                    File Output Operator [FS_225]
                       table:{"name:":"default.c_n3"}
-                       Please refer to the previous Select Operator [SEL_153]
-                    Reduce Output Operator [RS_163]
-                      Select Operator [SEL_160] (rows=2899/5421 width=178)
+                       Please refer to the previous Select Operator [SEL_219]
+                    Reduce Output Operator [RS_229]
+                      Select Operator [SEL_226] (rows=2899/5421 width=178)
                         Output:["key","value"]
-                         Please refer to the previous Select Operator [SEL_153]
+                         Please refer to the previous Select Operator [SEL_219]
               Reducer 6 llap
               File Output Operator [FS_89]
                 Group By Operator [GBY_87] (rows=1/1 width=880)
@@ -1506,16 +1506,16 @@ Stage-5
                         Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
                       <-Union 6 [SIMPLE_EDGE]
                         <-Reducer 15 [CONTAINS] llap
-                          Reduce Output Operator [RS_194]
+                          Reduce Output Operator [RS_260]
                             PartitionCols:_col0, _col1
-                            Select Operator [SEL_192] (rows=193/304 width=175)
+                            Select Operator [SEL_258] (rows=193/304 width=175)
                               Output:["_col0","_col1"]
-                              Merge Join Operator [MERGEJOIN_191] 
(rows=193/304 width=175)
+                              Merge Join Operator [MERGEJOIN_257] 
(rows=193/304 width=175)
                                 
Conds:RS_104._col1=RS_105._col1(Inner),Output:["_col0","_col3"]
                               <-Reducer 14 [SIMPLE_EDGE] llap
                                 SHUFFLE [RS_104]
                                   PartitionCols:_col1
-                                  Merge Join Operator [MERGEJOIN_176] 
(rows=39/115 width=264)
+                                  Merge Join Operator [MERGEJOIN_242] 
(rows=39/115 width=264)
                                     
Conds:RS_101._col0=RS_102._col0(Inner),Output:["_col0","_col1","_col3"]
                                   <-Map 13 [SIMPLE_EDGE] llap
                                     SHUFFLE [RS_101]
@@ -1544,74 +1544,74 @@ Stage-5
                                       Output:["_col0","_col1"],keys:KEY._col0, 
KEY._col1
                                     <-Union 34 [SIMPLE_EDGE]
                                       <-Map 38 [CONTAINS] llap
-                                        Reduce Output Operator [RS_251]
+                                        Reduce Output Operator [RS_317]
                                           PartitionCols:_col1, _col0
-                                          Select Operator [SEL_249] 
(rows=500/500 width=178)
+                                          Select Operator [SEL_315] 
(rows=500/500 width=178)
                                             Output:["_col0","_col1"]
-                                            Filter Operator [FIL_248] 
(rows=500/500 width=178)
+                                            Filter Operator [FIL_314] 
(rows=500/500 width=178)
                                               predicate:value is not null
-                                              TableScan [TS_247] (rows=500/500 
width=178)
+                                              TableScan [TS_313] (rows=500/500 
width=178)
                                                 Output:["key","value"]
                                       <-Reducer 33 [CONTAINS] llap
-                                        Reduce Output Operator [RS_236]
+                                        Reduce Output Operator [RS_302]
                                           PartitionCols:_col1, _col0
-                                          Select Operator [SEL_234] 
(rows=1025/319 width=178)
+                                          Select Operator [SEL_300] 
(rows=1025/319 width=178)
                                             Output:["_col0","_col1"]
-                                            Group By Operator [GBY_233] 
(rows=1025/319 width=178)
+                                            Group By Operator [GBY_299] 
(rows=1025/319 width=178)
                                               
Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
                                             <-Union 32 [SIMPLE_EDGE]
                                               <-Map 37 [CONTAINS] llap
-                                                Reduce Output Operator [RS_246]
+                                                Reduce Output Operator [RS_312]
                                                   PartitionCols:_col1, _col0
-                                                  Select Operator [SEL_244] 
(rows=500/500 width=178)
+                                                  Select Operator [SEL_310] 
(rows=500/500 width=178)
                                                     Output:["_col0","_col1"]
-                                                    Filter Operator [FIL_243] 
(rows=500/500 width=178)
+                                                    Filter Operator [FIL_309] 
(rows=500/500 width=178)
                                                       predicate:value is not 
null
-                                                      TableScan [TS_242] 
(rows=500/500 width=178)
+                                                      TableScan [TS_308] 
(rows=500/500 width=178)
                                                         Output:["key","value"]
                                               <-Reducer 31 [CONTAINS] llap
-                                                Reduce Output Operator [RS_232]
+                                                Reduce Output Operator [RS_298]
                                                   PartitionCols:_col1, _col0
-                                                  Select Operator [SEL_230] 
(rows=525/319 width=178)
+                                                  Select Operator [SEL_296] 
(rows=525/319 width=178)
                                                     Output:["_col0","_col1"]
-                                                    Group By Operator 
[GBY_229] (rows=525/319 width=178)
+                                                    Group By Operator 
[GBY_295] (rows=525/319 width=178)
                                                       
Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
                                                     <-Union 30 [SIMPLE_EDGE]
                                                       <-Map 29 [CONTAINS] llap
-                                                        Reduce Output Operator 
[RS_228]
+                                                        Reduce Output Operator 
[RS_294]
                                                           PartitionCols:_col1, 
_col0
-                                                          Select Operator 
[SEL_226] (rows=25/25 width=175)
+                                                          Select Operator 
[SEL_292] (rows=25/25 width=175)
                                                             
Output:["_col0","_col1"]
-                                                            Filter Operator 
[FIL_225] (rows=25/25 width=175)
+                                                            Filter Operator 
[FIL_291] (rows=25/25 width=175)
                                                               predicate:value 
is not null
-                                                              TableScan 
[TS_224] (rows=25/25 width=175)
+                                                              TableScan 
[TS_290] (rows=25/25 width=175)
                                                                 
Output:["key","value"]
                                                       <-Map 36 [CONTAINS] llap
-                                                        Reduce Output Operator 
[RS_241]
+                                                        Reduce Output Operator 
[RS_307]
                                                           PartitionCols:_col1, 
_col0
-                                                          Select Operator 
[SEL_239] (rows=500/500 width=178)
+                                                          Select Operator 
[SEL_305] (rows=500/500 width=178)
                                                             
Output:["_col0","_col1"]
-                                                            Filter Operator 
[FIL_238] (rows=500/500 width=178)
+                                                            Filter Operator 
[FIL_304] (rows=500/500 width=178)
                                                               predicate:value 
is not null
-                                                              TableScan 
[TS_237] (rows=500/500 width=178)
+                                                              TableScan 
[TS_303] (rows=500/500 width=178)
                                                                 
Output:["key","value"]
                         <-Reducer 5 [CONTAINS] llap
-                          Reduce Output Operator [RS_186]
+                          Reduce Output Operator [RS_252]
                             PartitionCols:_col0, _col1
-                            Group By Operator [GBY_184] (rows=2706/309 
width=178)
+                            Group By Operator [GBY_250] (rows=2706/309 
width=178)
                               Output:["_col0","_col1"],keys:KEY._col0, 
KEY._col1
                             <-Union 4 [SIMPLE_EDGE]
                               <-Reducer 12 [CONTAINS] llap
-                                Reduce Output Operator [RS_190]
+                                Reduce Output Operator [RS_256]
                                   PartitionCols:_col0, _col1
-                                  Select Operator [SEL_188] (rows=2640/1056 
width=178)
+                                  Select Operator [SEL_254] (rows=2640/1056 
width=178)
                                     Output:["_col0","_col1"]
-                                    Merge Join Operator [MERGEJOIN_187] 
(rows=2640/1056 width=178)
+                                    Merge Join Operator [MERGEJOIN_253] 
(rows=2640/1056 width=178)
                                       
Conds:RS_55._col1=RS_56._col1(Inner),Output:["_col0","_col3"]
                                     <-Reducer 11 [SIMPLE_EDGE] llap
                                       SHUFFLE [RS_55]
                                         PartitionCols:_col1
-                                        Merge Join Operator [MERGEJOIN_175] 
(rows=791/1028 width=269)
+                                        Merge Join Operator [MERGEJOIN_241] 
(rows=791/1028 width=269)
                                           
Conds:RS_52._col0=RS_53._col0(Inner),Output:["_col0","_col1","_col3"]
                                         <-Map 1 [SIMPLE_EDGE] llap
                                           SHUFFLE [RS_52]
@@ -1640,46 +1640,46 @@ Stage-5
                                             
Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
                                           <-Union 24 [SIMPLE_EDGE]
                                             <-Map 27 [CONTAINS] llap
-                                              Reduce Output Operator [RS_223]
+                                              Reduce Output Operator [RS_289]
                                                 PartitionCols:_col1, _col0
-                                                Select Operator [SEL_221] 
(rows=500/500 width=178)
+                                                Select Operator [SEL_287] 
(rows=500/500 width=178)
                                                   Output:["_col0","_col1"]
-                                                  Filter Operator [FIL_220] 
(rows=500/500 width=178)
+                                                  Filter Operator [FIL_286] 
(rows=500/500 width=178)
                                                     predicate:value is not null
-                                                    TableScan [TS_219] 
(rows=500/500 width=178)
+                                                    TableScan [TS_285] 
(rows=500/500 width=178)
                                                       Output:["key","value"]
                                             <-Reducer 23 [CONTAINS] llap
-                                              Reduce Output Operator [RS_213]
+                                              Reduce Output Operator [RS_279]
                                                 PartitionCols:_col1, _col0
-                                                Select Operator [SEL_211] 
(rows=525/319 width=178)
+                                                Select Operator [SEL_277] 
(rows=525/319 width=178)
                                                   Output:["_col0","_col1"]
-                                                  Group By Operator [GBY_210] 
(rows=525/319 width=178)
+                                                  Group By Operator [GBY_276] 
(rows=525/319 width=178)
                                                     
Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
                                                   <-Union 22 [SIMPLE_EDGE]
                                                     <-Map 21 [CONTAINS] llap
-                                                      Reduce Output Operator 
[RS_209]
+                                                      Reduce Output Operator 
[RS_275]
                                                         PartitionCols:_col1, 
_col0
-                                                        Select Operator 
[SEL_207] (rows=25/25 width=175)
+                                                        Select Operator 
[SEL_273] (rows=25/25 width=175)
                                                           
Output:["_col0","_col1"]
-                                                          Filter Operator 
[FIL_206] (rows=25/25 width=175)
+                                                          Filter Operator 
[FIL_272] (rows=25/25 width=175)
                                                             predicate:value is 
not null
-                                                            TableScan [TS_205] 
(rows=25/25 width=175)
+                                                            TableScan [TS_271] 
(rows=25/25 width=175)
                                                               
Output:["key","value"]
                                                     <-Map 26 [CONTAINS] llap
-                                                      Reduce Output Operator 
[RS_218]
+                                                      Reduce Output Operator 
[RS_284]
                                                         PartitionCols:_col1, 
_col0
-                                                        Select Operator 
[SEL_216] (rows=500/500 width=178)
+                                                        Select Operator 
[SEL_282] (rows=500/500 width=178)
                                                           
Output:["_col0","_col1"]
-                                                          Filter Operator 
[FIL_215] (rows=500/500 width=178)
+                                                          Filter Operator 
[FIL_281] (rows=500/500 width=178)
                                                             predicate:value is 
not null
-                                                            TableScan [TS_214] 
(rows=500/500 width=178)
+                                                            TableScan [TS_280] 
(rows=500/500 width=178)
                                                               
Output:["key","value"]
                               <-Reducer 3 [CONTAINS] llap
-                                Reduce Output Operator [RS_183]
+                                Reduce Output Operator [RS_249]
                                   PartitionCols:_col0, _col1
-                                  Select Operator [SEL_181] (rows=66/61 
width=177)
+                                  Select Operator [SEL_247] (rows=66/61 
width=177)
                                     Output:["_col0","_col1"]
-                                    Merge Join Operator [MERGEJOIN_180] 
(rows=66/61 width=177)
+                                    Merge Join Operator [MERGEJOIN_246] 
(rows=66/61 width=177)
                                       
Conds:RS_21._col3=RS_22._col1(Inner),Output:["_col1","_col2"]
                                     <-Reducer 18 [SIMPLE_EDGE] llap
                                       SHUFFLE [RS_22]
@@ -1690,27 +1690,27 @@ Stage-5
                                             
Output:["_col0","_col1"],keys:KEY._col0, KEY._col1
                                           <-Union 17 [SIMPLE_EDGE]
                                             <-Map 16 [CONTAINS] llap
-                                              Reduce Output Operator [RS_199]
+                                              Reduce Output Operator [RS_265]
                                                 PartitionCols:_col1, _col0
-                                                Select Operator [SEL_197] 
(rows=25/25 width=175)
+                                                Select Operator [SEL_263] 
(rows=25/25 width=175)
                                                   Output:["_col0","_col1"]
-                                                  Filter Operator [FIL_196] 
(rows=25/25 width=175)
+                                                  Filter Operator [FIL_262] 
(rows=25/25 width=175)
                                                     predicate:value is not null
-                                                    TableScan [TS_195] 
(rows=25/25 width=175)
+                                                    TableScan [TS_261] 
(rows=25/25 width=175)
                                                       Output:["key","value"]
                                             <-Map 19 [CONTAINS] llap
-                                              Reduce Output Operator [RS_204]
+                                              Reduce Output Operator [RS_270]
                                                 PartitionCols:_col1, _col0
-                                                Select Operator [SEL_202] 
(rows=500/500 width=178)
+                                                Select Operator [SEL_268] 
(rows=500/500 width=178)
                                                   Output:["_col0","_col1"]
-                                                  Filter Operator [FIL_201] 
(rows=500/500 width=178)
+                                                  Filter Operator [FIL_267] 
(rows=500/500 width=178)
                                                     predicate:value is not null
-                                                    TableScan [TS_200] 
(rows=500/500 width=178)
+                                                    TableScan [TS_266] 
(rows=500/500 width=178)
                                                       Output:["key","value"]
                                     <-Reducer 2 [SIMPLE_EDGE] llap
                                       SHUFFLE [RS_21]
                                         PartitionCols:_col3
-                                        Merge Join Operator [MERGEJOIN_174] 
(rows=39/37 width=266)
+                                        Merge Join Operator [MERGEJOIN_240] 
(rows=39/37 width=266)
                                           
Conds:RS_18._col0=RS_19._col0(Inner),Output:["_col1","_col2","_col3"]
                                         <-Map 1 [SIMPLE_EDGE] llap
                                           SHUFFLE [RS_18]

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