PREHOOK: query: -- When Correlation Optimizer is turned off, 4 MR jobs are needed. -- When Correlation Optimizer is turned on, 2 MR jobs are needed. -- The first job will evaluate subquery xx and xx join yy. EXPLAIN SELECT xx.key, xx.cnt, yy.key FROM (SELECT x.key as key, count(1) as cnt FROM src1 x JOIN src1 y ON (x.key = y.key) group by x.key) xx JOIN src yy ON xx.key=yy.key ORDER BY xx.key, xx.cnt, yy.key PREHOOK: type: QUERY POSTHOOK: query: -- When Correlation Optimizer is turned off, 4 MR jobs are needed. -- When Correlation Optimizer is turned on, 2 MR jobs are needed. -- The first job will evaluate subquery xx and xx join yy. EXPLAIN SELECT xx.key, xx.cnt, yy.key FROM (SELECT x.key as key, count(1) as cnt FROM src1 x JOIN src1 y ON (x.key = y.key) group by x.key) xx JOIN src yy ON xx.key=yy.key ORDER BY xx.key, xx.cnt, yy.key POSTHOOK: type: QUERY ABSTRACT SYNTAX TREE: (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_TABREF (TOK_TABNAME src1) x) (TOK_TABREF (TOK_TABNAME src1) y) (= (. (TOK_TABLE_OR_COL x) key) (. (TOK_TABLE_OR_COL y) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL x) key) key) (TOK_SELEXPR (TOK_FUNCTION count 1) cnt)) (TOK_GROUPBY (. (TOK_TABLE_OR_COL x) key)))) xx) (TOK_TABREF (TOK_TABNAME src) yy) (= (. (TOK_TABLE_OR_COL xx) key) (. (TOK_TABLE_OR_COL yy) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL xx) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL xx) cnt)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL yy) key))) (TOK_ORDERBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL xx) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL xx) cnt)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL yy) key))))) STAGE DEPENDENCIES: Stage-3 is a root stage Stage-4 depends on stages: Stage-3 Stage-1 depends on stages: Stage-4 Stage-2 depends on stages: Stage-1 Stage-0 is a root stage STAGE PLANS: Stage: Stage-3 Map Reduce Alias -> Map Operator Tree: xx:x TableScan alias: x 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 xx:y TableScan alias: y Reduce Output Operator key expressions: expr: key type: string sort order: + Map-reduce partition columns: expr: key type: string tag: 1 Reduce Operator Tree: Join Operator condition map: Inner Join 0 to 1 condition expressions: 0 {VALUE._col0} 1 handleSkewJoin: false outputColumnNames: _col0 Select Operator expressions: expr: _col0 type: string outputColumnNames: _col0 Group By Operator aggregations: expr: count(1) bucketGroup: false keys: expr: _col0 type: string mode: hash 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-4 Map Reduce Alias -> Map Operator Tree: #### A masked pattern was here #### Reduce Output Operator key expressions: expr: _col0 type: string sort order: + Map-reduce partition columns: expr: _col0 type: string tag: -1 value expressions: expr: _col1 type: bigint Reduce Operator Tree: Group By Operator aggregations: expr: count(VALUE._col0) bucketGroup: false keys: expr: KEY._col0 type: string mode: mergepartial outputColumnNames: _col0, _col1 Select Operator expressions: expr: _col0 type: string expr: _col1 type: bigint 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-1 Map Reduce Alias -> Map Operator Tree: $INTNAME Reduce Output Operator key expressions: expr: _col0 type: string sort order: + Map-reduce partition columns: expr: _col0 type: string tag: 0 value expressions: expr: _col0 type: string expr: _col1 type: bigint yy TableScan alias: yy 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: Inner Join 0 to 1 condition expressions: 0 {VALUE._col0} {VALUE._col1} 1 {VALUE._col0} handleSkewJoin: false outputColumnNames: _col0, _col1, _col2 Select Operator expressions: expr: _col0 type: string expr: _col1 type: bigint expr: _col2 type: string outputColumnNames: _col0, _col1, _col2 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: #### A masked pattern was here #### Reduce Output Operator key expressions: expr: _col0 type: string expr: _col1 type: bigint expr: _col2 type: string sort order: +++ tag: -1 value expressions: expr: _col0 type: string expr: _col1 type: bigint expr: _col2 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 PREHOOK: query: SELECT xx.key, xx.cnt, yy.key FROM (SELECT x.key as key, count(1) as cnt FROM src1 x JOIN src1 y ON (x.key = y.key) group by x.key) xx JOIN src yy ON xx.key=yy.key ORDER BY xx.key, xx.cnt, yy.key PREHOOK: type: QUERY PREHOOK: Input: default@src PREHOOK: Input: default@src1 #### A masked pattern was here #### POSTHOOK: query: SELECT xx.key, xx.cnt, yy.key FROM (SELECT x.key as key, count(1) as cnt FROM src1 x JOIN src1 y ON (x.key = y.key) group by x.key) xx JOIN src yy ON xx.key=yy.key ORDER BY xx.key, xx.cnt, yy.key POSTHOOK: type: QUERY POSTHOOK: Input: default@src POSTHOOK: Input: default@src1 #### A masked pattern was here #### 128 1 128 128 1 128 128 1 128 146 1 146 146 1 146 150 1 150 213 1 213 213 1 213 224 1 224 224 1 224 238 1 238 238 1 238 255 1 255 255 1 255 273 1 273 273 1 273 273 1 273 278 1 278 278 1 278 311 1 311 311 1 311 311 1 311 369 1 369 369 1 369 369 1 369 401 1 401 401 1 401 401 1 401 401 1 401 401 1 401 406 1 406 406 1 406 406 1 406 406 1 406 66 1 66 98 1 98 98 1 98 PREHOOK: query: EXPLAIN SELECT xx.key, xx.cnt, yy.key FROM (SELECT x.key as key, count(1) as cnt FROM src1 x JOIN src1 y ON (x.key = y.key) group by x.key) xx JOIN src yy ON xx.key=yy.key ORDER BY xx.key, xx.cnt, yy.key PREHOOK: type: QUERY POSTHOOK: query: EXPLAIN SELECT xx.key, xx.cnt, yy.key FROM (SELECT x.key as key, count(1) as cnt FROM src1 x JOIN src1 y ON (x.key = y.key) group by x.key) xx JOIN src yy ON xx.key=yy.key ORDER BY xx.key, xx.cnt, yy.key POSTHOOK: type: QUERY ABSTRACT SYNTAX TREE: (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_TABREF (TOK_TABNAME src1) x) (TOK_TABREF (TOK_TABNAME src1) y) (= (. (TOK_TABLE_OR_COL x) key) (. (TOK_TABLE_OR_COL y) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL x) key) key) (TOK_SELEXPR (TOK_FUNCTION count 1) cnt)) (TOK_GROUPBY (. (TOK_TABLE_OR_COL x) key)))) xx) (TOK_TABREF (TOK_TABNAME src) yy) (= (. (TOK_TABLE_OR_COL xx) key) (. (TOK_TABLE_OR_COL yy) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (. (TOK_TABLE_OR_COL xx) key)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL xx) cnt)) (TOK_SELEXPR (. (TOK_TABLE_OR_COL yy) key))) (TOK_ORDERBY (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL xx) key)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL xx) cnt)) (TOK_TABSORTCOLNAMEASC (. (TOK_TABLE_OR_COL yy) 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: xx:x TableScan alias: x 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 xx:y TableScan alias: y Reduce Output Operator key expressions: expr: key type: string sort order: + Map-reduce partition columns: expr: key type: string tag: 1 yy TableScan alias: yy Reduce Output Operator key expressions: expr: key type: string sort order: + Map-reduce partition columns: expr: key type: string tag: 2 value expressions: expr: key type: string Reduce Operator Tree: Demux Operator Join Operator condition map: Inner Join 0 to 1 condition expressions: 0 {VALUE._col0} 1 handleSkewJoin: false outputColumnNames: _col0 Select Operator expressions: expr: _col0 type: string outputColumnNames: _col0 Mux Operator Group By Operator aggregations: expr: count(1) bucketGroup: false keys: expr: _col0 type: string mode: complete outputColumnNames: _col0, _col1 Select Operator expressions: expr: _col0 type: string expr: _col1 type: bigint outputColumnNames: _col0, _col1 Mux Operator Join Operator condition map: Inner Join 0 to 1 condition expressions: 0 {VALUE._col0} {VALUE._col1} 1 {VALUE._col0} handleSkewJoin: false outputColumnNames: _col0, _col1, _col2 Select Operator expressions: expr: _col0 type: string expr: _col1 type: bigint expr: _col2 type: string outputColumnNames: _col0, _col1, _col2 File Output Operator compressed: false GlobalTableId: 0 table: input format: org.apache.hadoop.mapred.SequenceFileInputFormat output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat Mux Operator Join Operator condition map: Inner Join 0 to 1 condition expressions: 0 {VALUE._col0} {VALUE._col1} 1 {VALUE._col0} handleSkewJoin: false outputColumnNames: _col0, _col1, _col2 Select Operator expressions: expr: _col0 type: string expr: _col1 type: bigint expr: _col2 type: string outputColumnNames: _col0, _col1, _col2 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: #### A masked pattern was here #### Reduce Output Operator key expressions: expr: _col0 type: string expr: _col1 type: bigint expr: _col2 type: string sort order: +++ tag: -1 value expressions: expr: _col0 type: string expr: _col1 type: bigint expr: _col2 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 PREHOOK: query: SELECT xx.key, xx.cnt, yy.key FROM (SELECT x.key as key, count(1) as cnt FROM src1 x JOIN src1 y ON (x.key = y.key) group by x.key) xx JOIN src yy ON xx.key=yy.key ORDER BY xx.key, xx.cnt, yy.key PREHOOK: type: QUERY PREHOOK: Input: default@src PREHOOK: Input: default@src1 #### A masked pattern was here #### POSTHOOK: query: SELECT xx.key, xx.cnt, yy.key FROM (SELECT x.key as key, count(1) as cnt FROM src1 x JOIN src1 y ON (x.key = y.key) group by x.key) xx JOIN src yy ON xx.key=yy.key ORDER BY xx.key, xx.cnt, yy.key POSTHOOK: type: QUERY POSTHOOK: Input: default@src POSTHOOK: Input: default@src1 #### A masked pattern was here #### 128 1 128 128 1 128 128 1 128 146 1 146 146 1 146 150 1 150 213 1 213 213 1 213 224 1 224 224 1 224 238 1 238 238 1 238 255 1 255 255 1 255 273 1 273 273 1 273 273 1 273 278 1 278 278 1 278 311 1 311 311 1 311 311 1 311 369 1 369 369 1 369 369 1 369 401 1 401 401 1 401 401 1 401 401 1 401 401 1 401 406 1 406 406 1 406 406 1 406 406 1 406 66 1 66 98 1 98 98 1 98