Saving all output to "!!{outputDirectory}!!/semijoin.q.raw". Enter "record" with no arguments to stop it.
>>>  !run !!{qFileDirectory}!!/semijoin.q
>>>  
>>>  
>>>  
>>>  
>>>  
>>>  create table t1 as select cast(key as int) key, value from src where key <= 10;
'key','value'
No rows selected 
>>>  
>>>  select * from t1 sort by key;
'key','value'
'0','val_0'
'0','val_0'
'0','val_0'
'2','val_2'
'4','val_4'
'5','val_5'
'5','val_5'
'5','val_5'
'8','val_8'
'9','val_9'
'10','val_10'
11 rows selected 
>>>  
>>>  create table t2 as select cast(2*key as int) key, value from t1;
'key','value'
No rows selected 
>>>  
>>>  select * from t2 sort by key;
'key','value'
'0','val_0'
'0','val_0'
'0','val_0'
'4','val_2'
'8','val_4'
'10','val_5'
'10','val_5'
'10','val_5'
'16','val_8'
'18','val_9'
'20','val_10'
11 rows selected 
>>>  
>>>  create table t3 as select * from (select * from t1 union all select * from t2) b;
'key','value'
No rows selected 
>>>  select * from t3 sort by key, value;
'key','value'
'0','val_0'
'0','val_0'
'0','val_0'
'0','val_0'
'0','val_0'
'0','val_0'
'2','val_2'
'4','val_2'
'4','val_4'
'5','val_5'
'5','val_5'
'5','val_5'
'8','val_4'
'8','val_8'
'9','val_9'
'10','val_10'
'10','val_5'
'10','val_5'
'10','val_5'
'16','val_8'
'18','val_9'
'20','val_10'
22 rows selected 
>>>  
>>>  create table t4 (key int, value string);
No rows affected 
>>>  select * from t4;
'key','value'
No rows selected 
>>>  
>>>  explain select * from t1 a left semi join t2 b on a.key=b.key sort by a.key, a.value;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t1) a) (TOK_TABREF (TOK_TABNAME t2) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'                  expr: _col1'
'                  type: string'
'            outputColumnNames: _col0, _col1'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'              sort order: ++'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
107 rows selected 
>>>  select * from t1 a left semi join t2 b on a.key=b.key sort by a.key, a.value;
'key','value'
'0','val_0'
'0','val_0'
'0','val_0'
'4','val_4'
'8','val_8'
'10','val_10'
6 rows selected 
>>>  
>>>  explain select * from t2 a left semi join t1 b on b.key=a.key sort by a.key, a.value;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t2) a) (TOK_TABREF (TOK_TABNAME t1) b) (= (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL a) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'                  expr: _col1'
'                  type: string'
'            outputColumnNames: _col0, _col1'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'              sort order: ++'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
107 rows selected 
>>>  select * from t2 a left semi join t1 b on b.key=a.key sort by a.key, a.value;
'key','value'
'0','val_0'
'0','val_0'
'0','val_0'
'4','val_2'
'8','val_4'
'10','val_5'
'10','val_5'
'10','val_5'
8 rows selected 
>>>  
>>>  explain select * from t1 a left semi join t4 b on b.key=a.key sort by a.key, a.value;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t1) a) (TOK_TABREF (TOK_TABNAME t4) b) (= (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL a) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'                  expr: _col1'
'                  type: string'
'            outputColumnNames: _col0, _col1'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'              sort order: ++'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
107 rows selected 
>>>  select * from t1 a left semi join t4 b on b.key=a.key sort by a.key, a.value;
'key','value'
No rows selected 
>>>  
>>>  explain select a.value from t1 a left semi join t3 b on (b.key = a.key and b.key < '15') sort by a.value;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t1) a) (TOK_TABREF (TOK_TABNAME t3) b) (and (= (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL a) key)) (< (. (TOK_TABLE_OR_COL b) key) '15')))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: value'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Filter Operator'
'              predicate:'
'                  expr: (key < 15)'
'                  type: boolean'
'              Select Operator'
'                expressions:'
'                      expr: key'
'                      type: int'
'                outputColumnNames: key'
'                Group By Operator'
'                  bucketGroup: false'
'                  keys:'
'                        expr: key'
'                        type: int'
'                        expr: key'
'                        type: int'
'                  mode: hash'
'                  outputColumnNames: _col0, _col1'
'                  Reduce Output Operator'
'                    key expressions:'
'                          expr: _col1'
'                          type: int'
'                    sort order: +'
'                    Map-reduce partition columns:'
'                          expr: _col1'
'                          type: int'
'                    tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col1'
'                  type: string'
'            outputColumnNames: _col0'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: string'
'              sort order: +'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
105 rows selected 
>>>  select a.value from t1 a left semi join t3 b on (b.key = a.key and b.key < '15') sort by a.value;
'value'
'val_0'
'val_0'
'val_0'
'val_10'
'val_2'
'val_4'
'val_5'
'val_5'
'val_5'
'val_8'
'val_9'
11 rows selected 
>>>  
>>>  explain select * from t1 a left semi join t2 b on a.key = b.key and b.value < "val_10" sort by a.key, a.value;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t1) a) (TOK_TABREF (TOK_TABNAME t2) b) (and (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)) (< (. (TOK_TABLE_OR_COL b) value) "val_10")))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Filter Operator'
'              predicate:'
'                  expr: (value < 'val_10')'
'                  type: boolean'
'              Select Operator'
'                expressions:'
'                      expr: key'
'                      type: int'
'                      expr: value'
'                      type: string'
'                outputColumnNames: key, value'
'                Group By Operator'
'                  bucketGroup: false'
'                  keys:'
'                        expr: key'
'                        type: int'
'                        expr: value'
'                        type: string'
'                  mode: hash'
'                  outputColumnNames: _col0, _col1'
'                  Reduce Output Operator'
'                    key expressions:'
'                          expr: _col0'
'                          type: int'
'                    sort order: +'
'                    Map-reduce partition columns:'
'                          expr: _col0'
'                          type: int'
'                    tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'                  expr: _col1'
'                  type: string'
'            outputColumnNames: _col0, _col1'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'              sort order: ++'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
115 rows selected 
>>>  select * from t1 a left semi join t2 b on a.key = b.key and b.value < "val_10" sort by a.key, a.value;
'key','value'
'0','val_0'
'0','val_0'
'0','val_0'
3 rows selected 
>>>  
>>>  explain select a.value from t1 a left semi join (select key from t3 where key > 5) b on a.key = b.key sort by a.value;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t1) a) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME t3))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_TABLE_OR_COL key))) (TOK_WHERE (> (TOK_TABLE_OR_COL key) 5)))) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: value'
'                    type: string'
'        b:t3 '
'          TableScan'
'            alias: t3'
'            Filter Operator'
'              predicate:'
'                  expr: (key > 5)'
'                  type: boolean'
'              Select Operator'
'                expressions:'
'                      expr: key'
'                      type: int'
'                outputColumnNames: _col0'
'                Select Operator'
'                  expressions:'
'                        expr: _col0'
'                        type: int'
'                  outputColumnNames: _col0'
'                  Group By Operator'
'                    bucketGroup: false'
'                    keys:'
'                          expr: _col0'
'                          type: int'
'                    mode: hash'
'                    outputColumnNames: _col0'
'                    Reduce Output Operator'
'                      key expressions:'
'                            expr: _col0'
'                            type: int'
'                      sort order: +'
'                      Map-reduce partition columns:'
'                            expr: _col0'
'                            type: int'
'                      tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col1'
'                  type: string'
'            outputColumnNames: _col0'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: string'
'              sort order: +'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
108 rows selected 
>>>  select a.value from t1 a left semi join (select key from t3 where key > 5) b on a.key = b.key sort by a.value;
'value'
'val_10'
'val_8'
'val_9'
3 rows selected 
>>>  
>>>  explain select a.value from t1 a left semi join (select key , value from t2 where key > 5) b on a.key = b.key and b.value <= 'val_20' sort by a.value ;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t1) a) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME t2))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_TABLE_OR_COL key)) (TOK_SELEXPR (TOK_TABLE_OR_COL value))) (TOK_WHERE (> (TOK_TABLE_OR_COL key) 5)))) b) (and (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)) (<= (. (TOK_TABLE_OR_COL b) value) 'val_20')))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) value))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: value'
'                    type: string'
'        b:t2 '
'          TableScan'
'            alias: t2'
'            Filter Operator'
'              predicate:'
'                  expr: ((key > 5) and (value <= 'val_20'))'
'                  type: boolean'
'              Select Operator'
'                expressions:'
'                      expr: key'
'                      type: int'
'                      expr: value'
'                      type: string'
'                outputColumnNames: _col0, _col1'
'                Select Operator'
'                  expressions:'
'                        expr: _col0'
'                        type: int'
'                        expr: _col1'
'                        type: string'
'                  outputColumnNames: _col0, _col1'
'                  Group By Operator'
'                    bucketGroup: false'
'                    keys:'
'                          expr: _col0'
'                          type: int'
'                          expr: _col1'
'                          type: string'
'                    mode: hash'
'                    outputColumnNames: _col0, _col1'
'                    Reduce Output Operator'
'                      key expressions:'
'                            expr: _col0'
'                            type: int'
'                      sort order: +'
'                      Map-reduce partition columns:'
'                            expr: _col0'
'                            type: int'
'                      tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col1'
'                  type: string'
'            outputColumnNames: _col0'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: string'
'              sort order: +'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
114 rows selected 
>>>  select a.value from t1 a left semi join (select key , value from t2 where key > 5) b on a.key = b.key and b.value <= 'val_20' sort by a.value ;
'value'
No rows selected 
>>>  
>>>  explain select * from t2 a left semi join (select key , value from t1 where key > 2) b on a.key = b.key sort by a.key, a.value;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t2) a) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME t1))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_TABLE_OR_COL key)) (TOK_SELEXPR (TOK_TABLE_OR_COL value))) (TOK_WHERE (> (TOK_TABLE_OR_COL key) 2)))) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'        b:t1 '
'          TableScan'
'            alias: t1'
'            Filter Operator'
'              predicate:'
'                  expr: (key > 2)'
'                  type: boolean'
'              Select Operator'
'                expressions:'
'                      expr: key'
'                      type: int'
'                outputColumnNames: _col0'
'                Select Operator'
'                  expressions:'
'                        expr: _col0'
'                        type: int'
'                  outputColumnNames: _col0'
'                  Group By Operator'
'                    bucketGroup: false'
'                    keys:'
'                          expr: _col0'
'                          type: int'
'                    mode: hash'
'                    outputColumnNames: _col0'
'                    Reduce Output Operator'
'                      key expressions:'
'                            expr: _col0'
'                            type: int'
'                      sort order: +'
'                      Map-reduce partition columns:'
'                            expr: _col0'
'                            type: int'
'                      tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'                  expr: _col1'
'                  type: string'
'            outputColumnNames: _col0, _col1'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'              sort order: ++'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
116 rows selected 
>>>  select * from t2 a left semi join (select key , value from t1 where key > 2) b on a.key = b.key sort by a.key, a.value;
'key','value'
'4','val_2'
'8','val_4'
'10','val_5'
'10','val_5'
'10','val_5'
5 rows selected 
>>>  
>>>  explain select /*+ mapjoin(b) */ a.key from t3 a left semi join t1 b on a.key = b.key sort by a.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t3) a) (TOK_TABREF (TOK_TABNAME t1) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST b))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)))))'
''
'STAGE DEPENDENCIES:'
'  Stage-4 is a root stage'
'  Stage-1 depends on stages: Stage-4'
'  Stage-2 depends on stages: Stage-1'
'  Stage-0 is a root stage'
''
'STAGE PLANS:'
'  Stage: Stage-4'
'    Map Reduce Local Work'
'      Alias -> Map Local Tables:'
'        b '
'          Fetch Operator'
'            limit: -1'
'      Alias -> Map Local Operator Tree:'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                HashTable Sink Operator'
'                  condition expressions:'
'                    0 {key}'
'                    1 '
'                  handleSkewJoin: false'
'                  keys:'
'                    0 [Column[key]]'
'                    1 [Column[_col0]]'
'                  Position of Big Table: 0'
''
'  Stage: Stage-1'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        a '
'          TableScan'
'            alias: a'
'            Map Join Operator'
'              condition map:'
'                   Left Semi Join 0 to 1'
'              condition expressions:'
'                0 {key}'
'                1 '
'              handleSkewJoin: false'
'              keys:'
'                0 [Column[key]]'
'                1 [Column[_col0]]'
'              outputColumnNames: _col0'
'              Position of Big Table: 0'
'              File Output Operator'
'                compressed: false'
'                GlobalTableId: 0'
'                table:'
'                    input format: org.apache.hadoop.mapred.SequenceFileInputFormat'
'                    output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat'
'      Local Work:'
'        Map Reduce Local Work'
''
'  Stage: Stage-2'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        file:!!{hive.exec.scratchdir}!! '
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'            outputColumnNames: _col0'
'            Select Operator'
'              expressions:'
'                    expr: _col0'
'                    type: int'
'              outputColumnNames: _col0'
'              Reduce Output Operator'
'                key expressions:'
'                      expr: _col0'
'                      type: int'
'                sort order: +'
'                tag: -1'
'                value expressions:'
'                      expr: _col0'
'                      type: int'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
106 rows selected 
>>>  select /*+ mapjoin(b) */ a.key from t3 a left semi join t1 b on a.key = b.key sort by a.key;
'key'
'0'
'0'
'0'
'0'
'0'
'0'
'2'
'4'
'4'
'5'
'5'
'5'
'8'
'8'
'9'
'10'
'10'
'10'
'10'
19 rows selected 
>>>  
>>>  explain select * from t1 a left semi join t2 b on a.key = 2*b.key sort by a.key, a.value;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t1) a) (TOK_TABREF (TOK_TABNAME t2) b) (= (. (TOK_TABLE_OR_COL a) key) (* 2 (. (TOK_TABLE_OR_COL b) key))))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: (2 * _col0)'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: (2 * _col0)'
'                        type: int'
'                  tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'                  expr: _col1'
'                  type: string'
'            outputColumnNames: _col0, _col1'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'              sort order: ++'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
107 rows selected 
>>>  select * from t1 a left semi join t2 b on a.key = 2*b.key sort by a.key, a.value;
'key','value'
'0','val_0'
'0','val_0'
'0','val_0'
'8','val_8'
4 rows selected 
>>>  
>>>  explain select * from t1 a join t2 b on a.key = b.key left semi join t3 c on b.key = c.key sort by a.key, a.value;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_JOIN (TOK_TABREF (TOK_TABNAME t1) a) (TOK_TABREF (TOK_TABNAME t2) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key))) (TOK_TABREF (TOK_TABNAME t3) c) (= (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL c) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 1'
'              value expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'        c '
'          TableScan'
'            alias: c'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 2'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Inner Join 0 to 1'
'               Left Semi Join 1 to 2'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 {VALUE._col0} {VALUE._col1}'
'            2 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1, _col4, _col5'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'                  expr: _col1'
'                  type: string'
'                  expr: _col4'
'                  type: int'
'                  expr: _col5'
'                  type: string'
'            outputColumnNames: _col0, _col1, _col2, _col3'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'              sort order: ++'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'                    expr: _col2'
'                    type: int'
'                    expr: _col3'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
134 rows selected 
>>>  select * from t1 a join t2 b on a.key = b.key left semi join t3 c on b.key = c.key sort by a.key, a.value;
'key','value','key','value'
'0','val_0','0','val_0'
'0','val_0','0','val_0'
'0','val_0','0','val_0'
'0','val_0','0','val_0'
'0','val_0','0','val_0'
'0','val_0','0','val_0'
'0','val_0','0','val_0'
'0','val_0','0','val_0'
'0','val_0','0','val_0'
'4','val_4','4','val_2'
'8','val_8','8','val_4'
'10','val_10','10','val_5'
'10','val_10','10','val_5'
'10','val_10','10','val_5'
14 rows selected 
>>>  
>>>  explain select * from t3 a left semi join t1 b on a.key = b.key and a.value=b.value sort by a.key, a.value;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t3) a) (TOK_TABREF (TOK_TABNAME t1) b) (and (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key)) (= (. (TOK_TABLE_OR_COL a) value) (. (TOK_TABLE_OR_COL b) value))))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) value)))))'
''
'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: int'
'                    expr: value'
'                    type: string'
'              sort order: ++'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'              outputColumnNames: key, value'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                      expr: value'
'                      type: string'
'                mode: hash'
'                outputColumnNames: _col0, _col1'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                        expr: _col1'
'                        type: string'
'                  sort order: ++'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                        expr: _col1'
'                        type: string'
'                  tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'                  expr: _col1'
'                  type: string'
'            outputColumnNames: _col0, _col1'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'              sort order: ++'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'                    expr: _col1'
'                    type: string'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
119 rows selected 
>>>  select * from t3 a left semi join t1 b on a.key = b.key and a.value=b.value sort by a.key, a.value;
'key','value'
'0','val_0'
'0','val_0'
'0','val_0'
'0','val_0'
'0','val_0'
'0','val_0'
'2','val_2'
'4','val_4'
'5','val_5'
'5','val_5'
'5','val_5'
'8','val_8'
'9','val_9'
'10','val_10'
14 rows selected 
>>>  
>>>  explain select /*+ mapjoin(b, c) */ a.key from t3 a left semi join t1 b on a.key = b.key left semi join t2 c on a.key = c.key sort by a.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t3) a) (TOK_TABREF (TOK_TABNAME t1) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key))) (TOK_TABREF (TOK_TABNAME t2) c) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL c) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_HINTLIST (TOK_HINT TOK_MAPJOIN (TOK_HINTARGLIST b c))) (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)))))'
''
'STAGE DEPENDENCIES:'
'  Stage-5 is a root stage'
'  Stage-1 depends on stages: Stage-5'
'  Stage-2 depends on stages: Stage-1'
'  Stage-0 is a root stage'
''
'STAGE PLANS:'
'  Stage: Stage-5'
'    Map Reduce Local Work'
'      Alias -> Map Local Tables:'
'        b '
'          Fetch Operator'
'            limit: -1'
'        c '
'          Fetch Operator'
'            limit: -1'
'      Alias -> Map Local Operator Tree:'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                HashTable Sink Operator'
'                  condition expressions:'
'                    0 {key}'
'                    1 '
'                    2 '
'                  handleSkewJoin: false'
'                  keys:'
'                    0 [Column[key]]'
'                    1 [Column[_col0]]'
'                    2 [Column[_col0]]'
'                  Position of Big Table: 0'
'        c '
'          TableScan'
'            alias: c'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                HashTable Sink Operator'
'                  condition expressions:'
'                    0 {key}'
'                    1 '
'                    2 '
'                  handleSkewJoin: false'
'                  keys:'
'                    0 [Column[key]]'
'                    1 [Column[_col0]]'
'                    2 [Column[_col0]]'
'                  Position of Big Table: 0'
''
'  Stage: Stage-1'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        a '
'          TableScan'
'            alias: a'
'            Map Join Operator'
'              condition map:'
'                   Left Semi Join 0 to 1'
'                   Left Semi Join 0 to 2'
'              condition expressions:'
'                0 {key}'
'                1 '
'                2 '
'              handleSkewJoin: false'
'              keys:'
'                0 [Column[key]]'
'                1 [Column[_col0]]'
'                2 [Column[_col0]]'
'              outputColumnNames: _col0'
'              Position of Big Table: 0'
'              File Output Operator'
'                compressed: false'
'                GlobalTableId: 0'
'                table:'
'                    input format: org.apache.hadoop.mapred.SequenceFileInputFormat'
'                    output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat'
'      Local Work:'
'        Map Reduce Local Work'
''
'  Stage: Stage-2'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        file:!!{hive.exec.scratchdir}!! '
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'            outputColumnNames: _col0'
'            Select Operator'
'              expressions:'
'                    expr: _col0'
'                    type: int'
'              outputColumnNames: _col0'
'              Reduce Output Operator'
'                key expressions:'
'                      expr: _col0'
'                      type: int'
'                sort order: +'
'                tag: -1'
'                value expressions:'
'                      expr: _col0'
'                      type: int'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
140 rows selected 
>>>  select /*+ mapjoin(b, c) */ a.key from t3 a left semi join t1 b on a.key = b.key left semi join t2 c on a.key = c.key sort by a.key;
'key'
'0'
'0'
'0'
'0'
'0'
'0'
'4'
'4'
'8'
'8'
'10'
'10'
'10'
'10'
14 rows selected 
>>>  
>>>  explain select a.key from t3 a left outer join t1 b on a.key = b.key left semi join t2 c on b.key = c.key sort by a.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_LEFTOUTERJOIN (TOK_TABREF (TOK_TABNAME t3) a) (TOK_TABREF (TOK_TABNAME t1) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key))) (TOK_TABREF (TOK_TABNAME t2) c) (= (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL c) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'        b '
'          TableScan'
'            alias: b'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 1'
'        c '
'          TableScan'
'            alias: c'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 2'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Outer Join0 to 1'
'               Left Semi Join 1 to 2'
'          condition expressions:'
'            0 {VALUE._col0}'
'            1 '
'            2 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'            outputColumnNames: _col0'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'              sort order: +'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
113 rows selected 
>>>  select a.key from t3 a left outer join t1 b on a.key = b.key left semi join t2 c on b.key = c.key sort by a.key;
'key'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'4'
'4'
'8'
'8'
'10'
'10'
'10'
'10'
26 rows selected 
>>>  
>>>  explain select a.key from t1 a right outer join t3 b on a.key = b.key left semi join t2 c on b.key = c.key sort by a.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_RIGHTOUTERJOIN (TOK_TABREF (TOK_TABNAME t1) a) (TOK_TABREF (TOK_TABNAME t3) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key))) (TOK_TABREF (TOK_TABNAME t2) c) (= (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL c) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'        b '
'          TableScan'
'            alias: b'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 1'
'        c '
'          TableScan'
'            alias: c'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 2'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Right Outer Join0 to 1'
'               Left Semi Join 1 to 2'
'          condition expressions:'
'            0 {VALUE._col0}'
'            1 '
'            2 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'            outputColumnNames: _col0'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'              sort order: +'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
113 rows selected 
>>>  select a.key from t1 a right outer join t3 b on a.key = b.key left semi join t2 c on b.key = c.key sort by a.key;
'key'
''
''
''
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'4'
'4'
'8'
'8'
'10'
'10'
'10'
'10'
29 rows selected 
>>>  
>>>  explain select a.key from t1 a full outer join t3 b on a.key = b.key left semi join t2 c on b.key = c.key sort by a.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTSEMIJOIN (TOK_FULLOUTERJOIN (TOK_TABREF (TOK_TABNAME t1) a) (TOK_TABREF (TOK_TABNAME t3) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key))) (TOK_TABREF (TOK_TABNAME t2) c) (= (. (TOK_TABLE_OR_COL b) key) (. (TOK_TABLE_OR_COL c) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'        b '
'          TableScan'
'            alias: b'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 1'
'        c '
'          TableScan'
'            alias: c'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 2'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Outer Join 0 to 1'
'               Left Semi Join 1 to 2'
'          condition expressions:'
'            0 {VALUE._col0}'
'            1 '
'            2 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'            outputColumnNames: _col0'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'              sort order: +'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
113 rows selected 
>>>  select a.key from t1 a full outer join t3 b on a.key = b.key left semi join t2 c on b.key = c.key sort by a.key;
'key'
''
''
''
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'4'
'4'
'8'
'8'
'10'
'10'
'10'
'10'
29 rows selected 
>>>  
>>>  explain select a.key from t3 a left semi join t2 b on a.key = b.key left outer join t1 c on a.key = c.key sort by a.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTOUTERJOIN (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t3) a) (TOK_TABREF (TOK_TABNAME t2) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key))) (TOK_TABREF (TOK_TABNAME t1) c) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL c) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 1'
'        c '
'          TableScan'
'            alias: c'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 2'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'               Left Outer Join0 to 2'
'          condition expressions:'
'            0 {VALUE._col0}'
'            1 '
'            2 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'            outputColumnNames: _col0'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'              sort order: +'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
113 rows selected 
>>>  select a.key from t3 a left semi join t2 b on a.key = b.key left outer join t1 c on a.key = c.key sort by a.key;
'key'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'4'
'4'
'8'
'8'
'10'
'10'
'10'
'10'
'16'
'18'
'20'
29 rows selected 
>>>  
>>>  explain select a.key from t3 a left semi join t2 b on a.key = b.key right outer join t1 c on a.key = c.key sort by a.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_RIGHTOUTERJOIN (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t3) a) (TOK_TABREF (TOK_TABNAME t2) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key))) (TOK_TABREF (TOK_TABNAME t1) c) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL c) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 1'
'        c '
'          TableScan'
'            alias: c'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 2'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'               Right Outer Join0 to 2'
'          condition expressions:'
'            0 {VALUE._col0}'
'            1 '
'            2 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'            outputColumnNames: _col0'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'              sort order: +'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
113 rows selected 
>>>  select a.key from t3 a left semi join t2 b on a.key = b.key right outer join t1 c on a.key = c.key sort by a.key;
'key'
''
''
''
''
''
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'4'
'4'
'8'
'8'
'10'
'10'
'10'
'10'
31 rows selected 
>>>  
>>>  explain select a.key from t3 a left semi join t1 b on a.key = b.key full outer join t2 c on a.key = c.key sort by a.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_FULLOUTERJOIN (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t3) a) (TOK_TABREF (TOK_TABNAME t1) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key))) (TOK_TABREF (TOK_TABNAME t2) c) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL c) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)))))'
''
'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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 1'
'        c '
'          TableScan'
'            alias: c'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: key'
'                    type: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 2'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'               Outer Join 0 to 2'
'          condition expressions:'
'            0 {VALUE._col0}'
'            1 '
'            2 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'            outputColumnNames: _col0'
'            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:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'              sort order: +'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
113 rows selected 
>>>  select a.key from t3 a left semi join t1 b on a.key = b.key full outer join t2 c on a.key = c.key sort by a.key;
'key'
''
''
''
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'2'
'4'
'4'
'5'
'5'
'5'
'8'
'8'
'9'
'10'
'10'
'10'
'10'
'10'
'10'
'10'
'10'
'10'
'10'
'10'
'10'
42 rows selected 
>>>  
>>>  explain select a.key from t3 a left semi join t2 b on a.key = b.key left outer join t1 c on a.value = c.value sort by a.key;
'Explain'
'ABSTRACT SYNTAX TREE:'
'  (TOK_QUERY (TOK_FROM (TOK_LEFTOUTERJOIN (TOK_LEFTSEMIJOIN (TOK_TABREF (TOK_TABNAME t3) a) (TOK_TABREF (TOK_TABNAME t2) b) (= (. (TOK_TABLE_OR_COL a) key) (. (TOK_TABLE_OR_COL b) key))) (TOK_TABREF (TOK_TABNAME t1) c) (= (. (TOK_TABLE_OR_COL a) value) (. (TOK_TABLE_OR_COL c) value)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL a) key))) (TOK_SORTBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL a) key)))))'
''
'STAGE DEPENDENCIES:'
'  Stage-1 is a root stage'
'  Stage-2 depends on stages: Stage-1'
'  Stage-3 depends on stages: Stage-2'
'  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: int'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: key'
'                    type: int'
'              tag: 0'
'              value expressions:'
'                    expr: key'
'                    type: int'
'                    expr: value'
'                    type: string'
'        b '
'          TableScan'
'            alias: b'
'            Select Operator'
'              expressions:'
'                    expr: key'
'                    type: int'
'              outputColumnNames: key'
'              Group By Operator'
'                bucketGroup: false'
'                keys:'
'                      expr: key'
'                      type: int'
'                mode: hash'
'                outputColumnNames: _col0'
'                Reduce Output Operator'
'                  key expressions:'
'                        expr: _col0'
'                        type: int'
'                  sort order: +'
'                  Map-reduce partition columns:'
'                        expr: _col0'
'                        type: int'
'                  tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Semi Join 0 to 1'
'          condition expressions:'
'            0 {VALUE._col0} {VALUE._col1}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0, _col1'
'          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: _col0'
'                    type: int'
'        c '
'          TableScan'
'            alias: c'
'            Reduce Output Operator'
'              key expressions:'
'                    expr: value'
'                    type: string'
'              sort order: +'
'              Map-reduce partition columns:'
'                    expr: value'
'                    type: string'
'              tag: 1'
'      Reduce Operator Tree:'
'        Join Operator'
'          condition map:'
'               Left Outer Join0 to 1'
'          condition expressions:'
'            0 {VALUE._col0}'
'            1 '
'          handleSkewJoin: false'
'          outputColumnNames: _col0'
'          Select Operator'
'            expressions:'
'                  expr: _col0'
'                  type: int'
'            outputColumnNames: _col0'
'            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-3'
'    Map Reduce'
'      Alias -> Map Operator Tree:'
'        file:!!{hive.exec.scratchdir}!! '
'            Reduce Output Operator'
'              key expressions:'
'                    expr: _col0'
'                    type: int'
'              sort order: +'
'              tag: -1'
'              value expressions:'
'                    expr: _col0'
'                    type: int'
'      Reduce Operator Tree:'
'        Extract'
'          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'
''
''
146 rows selected 
>>>  select a.key from t3 a left semi join t2 b on a.key = b.key left outer join t1 c on a.value = c.value sort by a.key;
'key'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'4'
'4'
'8'
'8'
'10'
'10'
'10'
'10'
'10'
'10'
'10'
'10'
'10'
'10'
'16'
'18'
'20'
35 rows selected 
>>>  
>>>  
>>>  
>>>  
>>>  
>>>  !record