PREHOOK: query: CREATE TABLE T1(key STRING, val STRING) SKEWED BY (key) ON ((2)) STORED AS TEXTFILE PREHOOK: type: CREATETABLE POSTHOOK: query: CREATE TABLE T1(key STRING, val STRING) SKEWED BY (key) ON ((2)) STORED AS TEXTFILE POSTHOOK: type: CREATETABLE POSTHOOK: Output: default@T1 PREHOOK: query: LOAD DATA LOCAL INPATH '../data/files/T1.txt' INTO TABLE T1 PREHOOK: type: LOAD PREHOOK: Output: default@t1 POSTHOOK: query: LOAD DATA LOCAL INPATH '../data/files/T1.txt' INTO TABLE T1 POSTHOOK: type: LOAD POSTHOOK: Output: default@t1 PREHOOK: query: CREATE TABLE T2(key STRING, val STRING) STORED AS TEXTFILE PREHOOK: type: CREATETABLE POSTHOOK: query: CREATE TABLE T2(key STRING, val STRING) STORED AS TEXTFILE POSTHOOK: type: CREATETABLE POSTHOOK: Output: default@T2 PREHOOK: query: LOAD DATA LOCAL INPATH '../data/files/T2.txt' INTO TABLE T2 PREHOOK: type: LOAD PREHOOK: Output: default@t2 POSTHOOK: query: LOAD DATA LOCAL INPATH '../data/files/T2.txt' INTO TABLE T2 POSTHOOK: type: LOAD POSTHOOK: Output: default@t2 PREHOOK: query: -- no skew join compile time optimization would be performed if one of the -- join sources is a sub-query consisting of a union all -- adding a order by at the end to make the results deterministic EXPLAIN select * from ( select key, val from T1 union all select key, val from T1 ) subq1 join T2 b on subq1.key = b.key PREHOOK: type: QUERY POSTHOOK: query: -- no skew join compile time optimization would be performed if one of the -- join sources is a sub-query consisting of a union all -- adding a order by at the end to make the results deterministic EXPLAIN select * from ( select key, val from T1 union all select key, val from T1 ) subq1 join T2 b on subq1.key = b.key POSTHOOK: type: QUERY ABSTRACT SYNTAX TREE: (TOK_QUERY (TOK_FROM (TOK_JOIN (TOK_SUBQUERY (TOK_UNION (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 val))))) (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 val)))))) subq1) (TOK_TABREF (TOK_TABNAME T2) b) (= (. (TOK_TABLE_OR_COL subq1) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)))) STAGE DEPENDENCIES: Stage-1 is a root stage Stage-0 is a root stage STAGE PLANS: Stage: Stage-1 Map Reduce Alias -> Map Operator Tree: b TableScan alias: b Reduce Output Operator key expressions: expr: key type: string sort order: + Map-reduce partition columns: expr: key type: string tag: 1 value expressions: expr: key type: string expr: val type: string null-subquery1:subq1-subquery1:t1 TableScan alias: t1 Select Operator expressions: expr: key type: string expr: val type: string outputColumnNames: _col0, _col1 Union 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: string null-subquery2:subq1-subquery2:t1 TableScan alias: t1 Select Operator expressions: expr: key type: string expr: val type: string outputColumnNames: _col0, _col1 Union 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: string Reduce Operator Tree: Join Operator condition map: Inner Join 0 to 1 condition expressions: 0 {VALUE._col0} {VALUE._col1} 1 {VALUE._col0} {VALUE._col1} handleSkewJoin: false outputColumnNames: _col0, _col1, _col2, _col3 Select Operator expressions: expr: _col0 type: string expr: _col1 type: string expr: _col2 type: string expr: _col3 type: string outputColumnNames: _col0, _col1, _col2, _col3 File Output Operator compressed: false GlobalTableId: 0 table: input format: org.apache.hadoop.mapred.TextInputFormat output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat Stage: Stage-0 Fetch Operator limit: -1 PREHOOK: query: select * from ( select key, val from T1 union all select key, val from T1 ) subq1 join T2 b on subq1.key = b.key ORDER BY subq1.key, b.key, subq1.val, b.val PREHOOK: type: QUERY PREHOOK: Input: default@t1 PREHOOK: Input: default@t2 #### A masked pattern was here #### POSTHOOK: query: select * from ( select key, val from T1 union all select key, val from T1 ) subq1 join T2 b on subq1.key = b.key ORDER BY subq1.key, b.key, subq1.val, b.val POSTHOOK: type: QUERY POSTHOOK: Input: default@t1 POSTHOOK: Input: default@t2 #### A masked pattern was here #### 2 12 2 22 2 12 2 22 3 13 3 13 3 13 3 13 8 18 8 18 8 18 8 18 8 18 8 18 8 18 8 18 8 28 8 18 8 28 8 18 8 28 8 18 8 28 8 18 PREHOOK: query: -- no skew join compile time optimization would be performed if one of the -- join sources is a sub-query consisting of a group by EXPLAIN select * from ( select key, count(1) as cnt from T1 group by key ) subq1 join T2 b on subq1.key = b.key PREHOOK: type: QUERY POSTHOOK: query: -- no skew join compile time optimization would be performed if one of the -- join sources is a sub-query consisting of a group by EXPLAIN select * from ( select key, count(1) as cnt from T1 group by key ) subq1 join T2 b on subq1.key = b.key POSTHOOK: type: QUERY ABSTRACT SYNTAX TREE: (TOK_QUERY (TOK_FROM (TOK_JOIN (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_FUNCTION count 1) cnt)) (TOK_GROUPBY (TOK_TABLE_OR_COL key)))) subq1) (TOK_TABREF (TOK_TABNAME T2) b) (= (. (TOK_TABLE_OR_COL subq1) key) (. (TOK_TABLE_OR_COL b) key)))) (TOK_INSERT (TOK_DESTINATION (TOK_DIR TOK_TMP_FILE)) (TOK_SELECT (TOK_SELEXPR TOK_ALLCOLREF)))) 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: subq1:t1 TableScan alias: t1 Select Operator expressions: expr: key type: string outputColumnNames: key Group By Operator aggregations: expr: count(1) bucketGroup: false keys: expr: key type: string mode: hash 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: _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-2 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 b TableScan alias: b Reduce Output Operator key expressions: expr: key type: string sort order: + Map-reduce partition columns: expr: key type: string tag: 1 value expressions: expr: key type: string expr: val type: string Reduce Operator Tree: Join Operator condition map: Inner Join 0 to 1 condition expressions: 0 {VALUE._col0} {VALUE._col1} 1 {VALUE._col0} {VALUE._col1} handleSkewJoin: false outputColumnNames: _col0, _col1, _col2, _col3 Select Operator expressions: expr: _col0 type: string expr: _col1 type: bigint expr: _col2 type: string expr: _col3 type: string outputColumnNames: _col0, _col1, _col2, _col3 File Output Operator compressed: false GlobalTableId: 0 table: input format: org.apache.hadoop.mapred.TextInputFormat output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat Stage: Stage-0 Fetch Operator limit: -1 PREHOOK: query: select * from ( select key, count(1) as cnt from T1 group by key ) subq1 join T2 b on subq1.key = b.key ORDER BY subq1.key, b.key, subq1.cnt, b.val PREHOOK: type: QUERY PREHOOK: Input: default@t1 PREHOOK: Input: default@t2 #### A masked pattern was here #### POSTHOOK: query: select * from ( select key, count(1) as cnt from T1 group by key ) subq1 join T2 b on subq1.key = b.key ORDER BY subq1.key, b.key, subq1.cnt, b.val POSTHOOK: type: QUERY POSTHOOK: Input: default@t1 POSTHOOK: Input: default@t2 #### A masked pattern was here #### 2 1 2 22 3 1 3 13 8 2 8 18 8 2 8 18