PREHOOK: query: explain FROM (SELECT src.* FROM src) x JOIN (SELECT src.* FROM src) Y ON (x.key = Y.key) select sum(hash(Y.key,Y.value)) PREHOOK: type: QUERY POSTHOOK: query: explain FROM (SELECT src.* FROM src) x JOIN (SELECT src.* FROM src) Y ON (x.key = Y.key) select sum(hash(Y.key,Y.value)) POSTHOOK: type: QUERY ABSTRACT SYNTAX TREE: (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME src))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_ALLCOLREF (TOK_TABNAME src)))))) x) (TOK_SUBQUERY (TOK_QUERY (TOK_FROM (TOK_TABREF (TOK_TABNAME src))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR (TOK_ALLCOLREF (TOK_TABNAME src)))))) 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_FUNCTION sum (TOK_FUNCTION hash (. (TOK_TABLE_OR_COL Y) key) (. (TOK_TABLE_OR_COL Y) value))))))) STAGE DEPENDENCIES: Stage-6 is a root stage , consists of Stage-7, Stage-8, Stage-1 Stage-7 has a backup stage: Stage-1 Stage-4 depends on stages: Stage-7 Stage-2 depends on stages: Stage-1, Stage-4, Stage-5 Stage-8 has a backup stage: Stage-1 Stage-5 depends on stages: Stage-8 Stage-1 Stage-0 is a root stage STAGE PLANS: Stage: Stage-6 Conditional Operator Stage: Stage-7 Map Reduce Local Work Alias -> Map Local Tables: y:src Fetch Operator limit: -1 Alias -> Map Local Operator Tree: y:src TableScan alias: src Select Operator expressions: expr: key type: string expr: value type: string outputColumnNames: _col0, _col1 HashTable Sink Operator condition expressions: 0 1 {_col0} {_col1} handleSkewJoin: false keys: 0 [Column[_col0]] 1 [Column[_col0]] Position of Big Table: 0 Stage: Stage-4 Map Reduce Alias -> Map Operator Tree: x:src TableScan alias: src Select Operator expressions: expr: key type: string outputColumnNames: _col0 Map Join Operator condition map: Inner Join 0 to 1 condition expressions: 0 1 {_col0} {_col1} handleSkewJoin: false keys: 0 [Column[_col0]] 1 [Column[_col0]] outputColumnNames: _col2, _col3 Position of Big Table: 0 Select Operator expressions: expr: _col2 type: string expr: _col3 type: string outputColumnNames: _col2, _col3 Group By Operator aggregations: expr: sum(hash(_col2,_col3)) bucketGroup: false mode: hash 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 Local Work: Map Reduce Local Work Stage: Stage-2 Map Reduce Alias -> Map Operator Tree: file:/tmp/sdong/hive_2011-02-10_01-13-28_404_8759389514701000314/-mr-10002 Reduce Output Operator sort order: tag: -1 value expressions: expr: _col0 type: bigint Reduce Operator Tree: Group By Operator aggregations: expr: sum(VALUE._col0) bucketGroup: false mode: mergepartial outputColumnNames: _col0 Select Operator expressions: expr: _col0 type: bigint outputColumnNames: _col0 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-8 Map Reduce Local Work Alias -> Map Local Tables: x:src Fetch Operator limit: -1 Alias -> Map Local Operator Tree: x:src TableScan alias: src Select Operator expressions: expr: key type: string outputColumnNames: _col0 HashTable Sink Operator condition expressions: 0 1 {_col0} {_col1} handleSkewJoin: false keys: 0 [Column[_col0]] 1 [Column[_col0]] Position of Big Table: 1 Stage: Stage-5 Map Reduce Alias -> Map Operator Tree: y:src TableScan alias: src Select Operator expressions: expr: key type: string expr: value type: string outputColumnNames: _col0, _col1 Map Join Operator condition map: Inner Join 0 to 1 condition expressions: 0 1 {_col0} {_col1} handleSkewJoin: false keys: 0 [Column[_col0]] 1 [Column[_col0]] outputColumnNames: _col2, _col3 Position of Big Table: 1 Select Operator expressions: expr: _col2 type: string expr: _col3 type: string outputColumnNames: _col2, _col3 Group By Operator aggregations: expr: sum(hash(_col2,_col3)) bucketGroup: false mode: hash 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 Local Work: Map Reduce Local Work Stage: Stage-1 Map Reduce Alias -> Map Operator Tree: x:src TableScan alias: src Select Operator expressions: expr: key type: string outputColumnNames: _col0 Reduce Output Operator key expressions: expr: _col0 type: string sort order: + Map-reduce partition columns: expr: _col0 type: string tag: 0 y:src TableScan alias: src Select Operator expressions: expr: key type: string expr: value type: string outputColumnNames: _col0, _col1 Reduce Output Operator key expressions: expr: _col0 type: string sort order: + Map-reduce partition columns: expr: _col0 type: string tag: 1 value expressions: expr: _col0 type: string expr: _col1 type: string Reduce Operator Tree: Join Operator condition map: Inner Join 0 to 1 condition expressions: 0 1 {VALUE._col0} {VALUE._col1} handleSkewJoin: false outputColumnNames: _col2, _col3 Select Operator expressions: expr: _col2 type: string expr: _col3 type: string outputColumnNames: _col2, _col3 Group By Operator aggregations: expr: sum(hash(_col2,_col3)) bucketGroup: false mode: hash 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-0 Fetch Operator limit: -1 PREHOOK: query: FROM (SELECT src.* FROM src) x JOIN (SELECT src.* FROM src) Y ON (x.key = Y.key) select sum(hash(Y.key,Y.value)) PREHOOK: type: QUERY PREHOOK: Input: default@src PREHOOK: Output: file:/tmp/sdong/hive_2011-02-10_01-13-28_640_8358101718433464644/-mr-10000 POSTHOOK: query: FROM (SELECT src.* FROM src) x JOIN (SELECT src.* FROM src) Y ON (x.key = Y.key) select sum(hash(Y.key,Y.value)) POSTHOOK: type: QUERY POSTHOOK: Input: default@src POSTHOOK: Output: file:/tmp/sdong/hive_2011-02-10_01-13-28_640_8358101718433464644/-mr-10000 103231310608