Saving all output to "!!{outputDirectory}!!/join_reorder.q.raw". Enter "record" with no arguments to stop it.
>>>  !run !!{qFileDirectory}!!/join_reorder.q
>>>  
>>>  
>>>  
>>>  
>>>  CREATE TABLE T1(key STRING, val STRING) STORED AS TEXTFILE;
No rows affected 
>>>  CREATE TABLE T2(key STRING, val STRING) STORED AS TEXTFILE;
No rows affected 
>>>  CREATE TABLE T3(key STRING, val STRING) STORED AS TEXTFILE;
No rows affected 
>>>  
>>>  LOAD DATA LOCAL INPATH '../data/files/T1.txt' INTO TABLE T1;
No rows affected 
>>>  LOAD DATA LOCAL INPATH '../data/files/T2.txt' INTO TABLE T2;
No rows affected 
>>>  LOAD DATA LOCAL INPATH '../data/files/T3.txt' INTO TABLE T3;
No rows affected 
>>>  
>>>  EXPLAIN FROM T1 a JOIN src c ON c.key+1=a.key 
SELECT a.key, a.val, c.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_TABREF (TOK_TABNAME T1) a) (TOK_TABREF (TOK_TABNAME src) c) (= (+ (. (TOK_TABLE_OR_COL c) key) 1) (. (TOK_TABLE_OR_COL a) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) val)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL c) key)))))'
''
'STAGE DEPENDENCIES:'
'  Stage-1 is a root stage'
'  Stage-0 is a root stage'
''
'STAGE PLANS:'
'  Stage: Stage-1'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        a '
'          TableScan'
'            alias: a'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: UDFToDouble(key)'
'                    type: double'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: UDFToDouble(key)'
'                    type: double'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'        c '
'          TableScan'
'            alias: c'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: (key + 1)'
'                    type: double'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: (key + 1)'
'                    type: double'
'              tag: 1'
'              value expressions:'
'                    expr: key'
'                    type: string'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Inner Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 {VALUE._col0}'
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1, _col4'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: string'
'                  expr: _col1'
'                  type: string'
'                  expr: _col4'
'                  type: string'
'            outputColumnNames: _col0, _col1, _col2'
'            File Output Operator'
'              compressed: false'
'              GlobalTableId: 0'
'              table:'
'                  input format: org.apache.hadoop.mapred.TextInputFormat'
'                  output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
''
'  Stage: Stage-0'
'    Fetch Operator'
'      limit: -1'
''
''
73 rows selected 
>>>  
>>>  EXPLAIN FROM T1 a JOIN src c ON c.key+1=a.key 
SELECT /*+ STREAMTABLE(a) */ a.key, a.val, c.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_TABREF (TOK_TABNAME T1) a) (TOK_TABREF (TOK_TABNAME src) c) (= (+ (. (TOK_TABLE_OR_COL c) key) 1) (. (TOK_TABLE_OR_COL a) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_STREAMTABLE (TOK_HINTARGLIST a))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) val)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL c) key)))))'
''
'STAGE DEPENDENCIES:'
'  Stage-1 is a root stage'
'  Stage-0 is a root stage'
''
'STAGE PLANS:'
'  Stage: Stage-1'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        a '
'          TableScan'
'            alias: a'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: UDFToDouble(key)'
'                    type: double'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: UDFToDouble(key)'
'                    type: double'
'              tag: 1'
'              value expressions:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'        c '
'          TableScan'
'            alias: c'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: (key + 1)'
'                    type: double'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: (key + 1)'
'                    type: double'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: string'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Inner Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 {VALUE._col0}'
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1, _col4'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: string'
'                  expr: _col1'
'                  type: string'
'                  expr: _col4'
'                  type: string'
'            outputColumnNames: _col0, _col1, _col2'
'            File Output Operator'
'              compressed: false'
'              GlobalTableId: 0'
'              table:'
'                  input format: org.apache.hadoop.mapred.TextInputFormat'
'                  output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
''
'  Stage: Stage-0'
'    Fetch Operator'
'      limit: -1'
''
''
73 rows selected 
>>>  
>>>  FROM T1 a JOIN src c ON c.key+1=a.key 
SELECT a.key, a.val, c.key;
'key','val','key'
'1','11','0'
'1','11','0'
'1','11','0'
'3','13','2'
4 rows selected 
>>>  
>>>  FROM T1 a JOIN src c ON c.key+1=a.key 
SELECT /*+ STREAMTABLE(a) */ a.key, a.val, c.key;
'key','val','key'
'1','11','0'
'1','11','0'
'1','11','0'
'3','13','2'
4 rows selected 
>>>  
>>>  EXPLAIN FROM T1 a 
LEFT OUTER JOIN T2 b ON (b.key=a.key) 
RIGHT OUTER JOIN T3 c ON (c.val = a.val) 
SELECT a.key, b.key, a.val, c.val;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_RIGHTOUTERJOIN (TOK_LEFTOUTERJOIN (TOK_TABREF (TOK_TABNAME T1) a) (TOK_TABREF (TOK_TABNAME T2) b) (= (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL a) key))) (TOK_TABREF (TOK_TABNAME T3) c) (= (. (TOK_TABLE_OR_COL c) val) (. (TOK_TABLE_OR_COL a) val)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL b) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) val)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL c) val)))))'
''
'STAGE DEPENDENCIES:'
'  Stage-1 is a root stage'
'  Stage-2 depends on stages: Stage-1'
'  Stage-0 is a root stage'
''
'STAGE PLANS:'
'  Stage: Stage-1'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        a '
'          TableScan'
'            alias: a'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: string'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: string'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: string'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: string'
'              tag: 1'
'              value expressions:'
'                    expr: key'
'                    type: string'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Outer Join0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 {VALUE._col0}'
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1, _col4'
'          File Output Operator'
'            compressed: false'
'            GlobalTableId: 0'
'            table:'
'                input format: org.apache.hadoop.mapred.SequenceFileInputFormat'
'                output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat'
''
'  Stage: Stage-2'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        $INTNAME '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col1'
'                    type: string'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: _col1'
'                    type: string'
'              tag: 0'
'              value expressions:'
'                    expr: _col4'
'                    type: string'
'                    expr: _col0'
'                    type: string'
'                    expr: _col1'
'                    type: string'
'        c '
'          TableScan'
'            alias: c'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: val'
'                    type: string'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: val'
'                    type: string'
'              tag: 1'
'              value expressions:'
'                    expr: val'
'                    type: string'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Right Outer Join0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col4} {VALUE._col5}'
'            1 {VALUE._col1}'
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col4, _col5, _col9'
'          Select Operator'
'            expressions:'
'                  expr: _col4'
'                  type: string'
'                  expr: _col0'
'                  type: string'
'                  expr: _col5'
'                  type: string'
'                  expr: _col9'
'                  type: string'
'            outputColumnNames: _col0, _col1, _col2, _col3'
'            File Output Operator'
'              compressed: false'
'              GlobalTableId: 0'
'              table:'
'                  input format: org.apache.hadoop.mapred.TextInputFormat'
'                  output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
''
'  Stage: Stage-0'
'    Fetch Operator'
'      limit: -1'
''
''
127 rows selected 
>>>  
>>>  EXPLAIN FROM T1 a 
LEFT OUTER JOIN T2 b ON (b.key=a.key) 
RIGHT OUTER JOIN T3 c ON (c.val = a.val) 
SELECT /*+ STREAMTABLE(a) */ a.key, b.key, a.val, c.val;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_RIGHTOUTERJOIN (TOK_LEFTOUTERJOIN (TOK_TABREF (TOK_TABNAME T1) a) (TOK_TABREF (TOK_TABNAME T2) b) (= (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL a) key))) (TOK_TABREF (TOK_TABNAME T3) c) (= (. (TOK_TABLE_OR_COL c) val) (. (TOK_TABLE_OR_COL a) val)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_STREAMTABLE (TOK_HINTARGLIST a))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL b) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) val)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL c) val)))))'
''
'STAGE DEPENDENCIES:'
'  Stage-1 is a root stage'
'  Stage-2 depends on stages: Stage-1'
'  Stage-0 is a root stage'
''
'STAGE PLANS:'
'  Stage: Stage-1'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        a '
'          TableScan'
'            alias: a'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: string'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: string'
'              tag: 1'
'              value expressions:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: string'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: string'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: string'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Outer Join0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 {VALUE._col0}'
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1, _col4'
'          File Output Operator'
'            compressed: false'
'            GlobalTableId: 0'
'            table:'
'                input format: org.apache.hadoop.mapred.SequenceFileInputFormat'
'                output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat'
''
'  Stage: Stage-2'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        $INTNAME '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col1'
'                    type: string'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: _col1'
'                    type: string'
'              tag: 1'
'              value expressions:'
'                    expr: _col4'
'                    type: string'
'                    expr: _col0'
'                    type: string'
'                    expr: _col1'
'                    type: string'
'        c '
'          TableScan'
'            alias: c'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: val'
'                    type: string'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: val'
'                    type: string'
'              tag: 0'
'              value expressions:'
'                    expr: val'
'                    type: string'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Right Outer Join0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col4} {VALUE._col5}'
'            1 {VALUE._col1}'
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col4, _col5, _col9'
'          Select Operator'
'            expressions:'
'                  expr: _col4'
'                  type: string'
'                  expr: _col0'
'                  type: string'
'                  expr: _col5'
'                  type: string'
'                  expr: _col9'
'                  type: string'
'            outputColumnNames: _col0, _col1, _col2, _col3'
'            File Output Operator'
'              compressed: false'
'              GlobalTableId: 0'
'              table:'
'                  input format: org.apache.hadoop.mapred.TextInputFormat'
'                  output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
''
'  Stage: Stage-0'
'    Fetch Operator'
'      limit: -1'
''
''
127 rows selected 
>>>  
>>>  FROM T1 a 
LEFT OUTER JOIN T2 b ON (b.key=a.key) 
RIGHT OUTER JOIN T3 c ON (c.val = a.val) 
SELECT a.key, b.key, a.val, c.val;
'key','key','val','val'
'2','2','12','12'
'','','','14'
'','','','16'
'7','','17','17'
4 rows selected 
>>>  
>>>  FROM T1 a 
LEFT OUTER JOIN T2 b ON (b.key=a.key) 
RIGHT OUTER JOIN T3 c ON (c.val = a.val) 
SELECT /*+ STREAMTABLE(a) */ a.key, b.key, a.val, c.val;
'key','key','val','val'
'2','2','12','12'
'','','','14'
'','','','16'
'7','','17','17'
4 rows selected 
>>>  
>>>  EXPLAIN FROM UNIQUEJOIN 
PRESERVE T1 a (a.key, a.val), 
PRESERVE T2 b (b.key, b.val), 
PRESERVE T3 c (c.key, c.val) 
SELECT a.key, b.key, c.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_UNIQUEJOIN PRESERVE (TOK_TABREF (TOK_TABNAME T1) a) (TOK_EXPLIST (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL a) val)) PRESERVE (TOK_TABREF (TOK_TABNAME T2) b) (TOK_EXPLIST (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL b) val)) PRESERVE (TOK_TABREF (TOK_TABNAME T3) c) (TOK_EXPLIST (. (TOK_TABLE_OR_COL c) key) (. (TOK_TABLE_OR_COL c) val)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL b) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL c) key)))))'
''
'STAGE DEPENDENCIES:'
'  Stage-1 is a root stage'
'  Stage-0 is a root stage'
''
'STAGE PLANS:'
'  Stage: Stage-1'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        a '
'          TableScan'
'            alias: a'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              sort order: ++'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              sort order: ++'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              tag: 1'
'              value expressions:'
'                    expr: key'
'                    type: string'
'        c '
'          TableScan'
'            alias: c'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              sort order: ++'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              tag: 2'
'              value expressions:'
'                    expr: key'
'                    type: string'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Unique Join0 to 0'
'               Unique Join0 to 0'
'               Unique Join0 to 0'
'          condition expressions:'
'            0 {VALUE._col0}'
'            1 {VALUE._col0}'
'            2 {VALUE._col0}'
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col4, _col8'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: string'
'                  expr: _col4'
'                  type: string'
'                  expr: _col8'
'                  type: string'
'            outputColumnNames: _col0, _col1, _col2'
'            File Output Operator'
'              compressed: false'
'              GlobalTableId: 0'
'              table:'
'                  input format: org.apache.hadoop.mapred.TextInputFormat'
'                  output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
''
'  Stage: Stage-0'
'    Fetch Operator'
'      limit: -1'
''
100 rows selected 
>>>  
>>>  EXPLAIN FROM UNIQUEJOIN 
PRESERVE T1 a (a.key, a.val), 
PRESERVE T2 b (b.key, b.val), 
PRESERVE T3 c (c.key, c.val) 
SELECT /*+ STREAMTABLE(b) */ a.key, b.key, c.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_UNIQUEJOIN PRESERVE (TOK_TABREF (TOK_TABNAME T1) a) (TOK_EXPLIST (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL a) val)) PRESERVE (TOK_TABREF (TOK_TABNAME T2) b) (TOK_EXPLIST (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL b) val)) PRESERVE (TOK_TABREF (TOK_TABNAME T3) c) (TOK_EXPLIST (. (TOK_TABLE_OR_COL c) key) (. (TOK_TABLE_OR_COL c) val)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_STREAMTABLE (TOK_HINTARGLIST b))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL b) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL c) key)))))'
''
'STAGE DEPENDENCIES:'
'  Stage-1 is a root stage'
'  Stage-0 is a root stage'
''
'STAGE PLANS:'
'  Stage: Stage-1'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        a '
'          TableScan'
'            alias: a'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              sort order: ++'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              sort order: ++'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              tag: 2'
'              value expressions:'
'                    expr: key'
'                    type: string'
'        c '
'          TableScan'
'            alias: c'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              sort order: ++'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: string'
'                    expr: val'
'                    type: string'
'              tag: 1'
'              value expressions:'
'                    expr: key'
'                    type: string'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Unique Join0 to 0'
'               Unique Join0 to 0'
'               Unique Join0 to 0'
'          condition expressions:'
'            0 {VALUE._col0}'
'            1 {VALUE._col0}'
'            2 {VALUE._col0}'
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col4, _col8'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: string'
'                  expr: _col4'
'                  type: string'
'                  expr: _col8'
'                  type: string'
'            outputColumnNames: _col0, _col1, _col2'
'            File Output Operator'
'              compressed: false'
'              GlobalTableId: 0'
'              table:'
'                  input format: org.apache.hadoop.mapred.TextInputFormat'
'                  output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
''
'  Stage: Stage-0'
'    Fetch Operator'
'      limit: -1'
''
100 rows selected 
>>>  
>>>  FROM UNIQUEJOIN 
PRESERVE T1 a (a.key, a.val), 
PRESERVE T2 b (b.key, b.val), 
PRESERVE T3 c (c.key, c.val) 
SELECT a.key, b.key, c.key;
'key','key','key'
'1','',''
'2','','2'
'','2',''
'3','3',''
'','4','4'
'','5',''
'','','6'
'7','','7'
'8','8',''
'8','8',''
'8','',''
11 rows selected 
>>>  
>>>  FROM UNIQUEJOIN 
PRESERVE T1 a (a.key, a.val), 
PRESERVE T2 b (b.key, b.val), 
PRESERVE T3 c (c.key, c.val) 
SELECT /*+ STREAMTABLE(b) */ a.key, b.key, c.key;
'key','key','key'
'1','',''
'2','','2'
'','2',''
'3','3',''
'','4','4'
'','5',''
'','','6'
'7','','7'
'8','8',''
'8','8',''
'8','',''
11 rows selected 
>>>  
>>>  
>>>  
>>>  
>>>  !record