PREHOOK: query: CREATE TABLE T1(key STRING, val STRING) SKEWED BY (key) ON ((2)) STORED AS TEXTFILE PREHOOK: type: CREATETABLE PREHOOK: Output: database:default PREHOOK: Output: default@T1 POSTHOOK: query: CREATE TABLE T1(key STRING, val STRING) SKEWED BY (key) ON ((2)) STORED AS TEXTFILE POSTHOOK: type: CREATETABLE POSTHOOK: Output: database:default POSTHOOK: Output: default@T1 PREHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T1.txt' INTO TABLE T1 PREHOOK: type: LOAD #### A masked pattern was here #### PREHOOK: Output: default@t1 POSTHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T1.txt' INTO TABLE T1 POSTHOOK: type: LOAD #### A masked pattern was here #### POSTHOOK: Output: default@t1 PREHOOK: query: CREATE TABLE T2(key STRING, val STRING) STORED AS TEXTFILE PREHOOK: type: CREATETABLE PREHOOK: Output: database:default PREHOOK: Output: default@T2 POSTHOOK: query: CREATE TABLE T2(key STRING, val STRING) STORED AS TEXTFILE POSTHOOK: type: CREATETABLE POSTHOOK: Output: database:default POSTHOOK: Output: default@T2 PREHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T2.txt' INTO TABLE T2 PREHOOK: type: LOAD #### A masked pattern was here #### PREHOOK: Output: default@t2 POSTHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T2.txt' INTO TABLE T2 POSTHOOK: type: LOAD #### A masked pattern was here #### POSTHOOK: Output: default@t2 PREHOOK: query: CREATE TABLE T3(key STRING, val STRING) SKEWED BY (val) ON ((12)) STORED AS TEXTFILE PREHOOK: type: CREATETABLE PREHOOK: Output: database:default PREHOOK: Output: default@T3 POSTHOOK: query: CREATE TABLE T3(key STRING, val STRING) SKEWED BY (val) ON ((12)) STORED AS TEXTFILE POSTHOOK: type: CREATETABLE POSTHOOK: Output: database:default POSTHOOK: Output: default@T3 PREHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T3.txt' INTO TABLE T3 PREHOOK: type: LOAD #### A masked pattern was here #### PREHOOK: Output: default@t3 POSTHOOK: query: LOAD DATA LOCAL INPATH '../../data/files/T3.txt' INTO TABLE T3 POSTHOOK: type: LOAD #### A masked pattern was here #### POSTHOOK: Output: default@t3 PREHOOK: query: -- This test is for skewed join compile time optimization for more than 2 tables. -- The join key for table 3 is different from the join key used for joining -- tables 1 and 2. Tables 1 and 3 are skewed. Since one of the join sources for table -- 3 consist of a sub-query which contains a join, the compile time skew join -- optimization is not enabled for table 3, but it is used for the first join between -- tables 1 and 2 -- adding a order by at the end to make the results deterministic EXPLAIN select * from T1 a join T2 b on a.key = b.key join T3 c on a.val = c.val PREHOOK: type: QUERY POSTHOOK: query: -- This test is for skewed join compile time optimization for more than 2 tables. -- The join key for table 3 is different from the join key used for joining -- tables 1 and 2. Tables 1 and 3 are skewed. Since one of the join sources for table -- 3 consist of a sub-query which contains a join, the compile time skew join -- optimization is not enabled for table 3, but it is used for the first join between -- tables 1 and 2 -- adding a order by at the end to make the results deterministic EXPLAIN select * from T1 a join T2 b on a.key = b.key join T3 c on a.val = c.val POSTHOOK: type: QUERY STAGE DEPENDENCIES: Stage-1 is a root stage Stage-2 depends on stages: Stage-1, Stage-5 Stage-5 is a root stage Stage-0 depends on stages: Stage-2 STAGE PLANS: Stage: Stage-1 Map Reduce Map Operator Tree: TableScan alias: a Statistics: Num rows: 0 Data size: 30 Basic stats: PARTIAL Column stats: NONE Filter Operator predicate: ((key is not null and val is not null) and (key = '2')) (type: boolean) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE Reduce Output Operator key expressions: key (type: string) sort order: + Map-reduce partition columns: key (type: string) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE value expressions: val (type: string) TableScan alias: b Statistics: Num rows: 0 Data size: 30 Basic stats: PARTIAL Column stats: NONE Filter Operator predicate: (key is not null and (key = '2')) (type: boolean) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE Reduce Output Operator key expressions: key (type: string) sort order: + Map-reduce partition columns: key (type: string) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE value expressions: val (type: string) Reduce Operator Tree: Join Operator condition map: Inner Join 0 to 1 keys: 0 key (type: string) 1 key (type: string) outputColumnNames: _col0, _col1, _col5, _col6 Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE File Output Operator compressed: false table: input format: org.apache.hadoop.mapred.SequenceFileInputFormat output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat serde: org.apache.hadoop.hive.serde2.lazybinary.LazyBinarySerDe Stage: Stage-2 Map Reduce Map Operator Tree: TableScan Union Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE Reduce Output Operator key expressions: _col1 (type: string) sort order: + Map-reduce partition columns: _col1 (type: string) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE value expressions: _col0 (type: string), _col5 (type: string), _col6 (type: string) TableScan alias: c Statistics: Num rows: 0 Data size: 20 Basic stats: PARTIAL Column stats: NONE Filter Operator predicate: val is not null (type: boolean) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE Reduce Output Operator key expressions: val (type: string) sort order: + Map-reduce partition columns: val (type: string) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE value expressions: key (type: string) TableScan Union Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE Reduce Output Operator key expressions: _col1 (type: string) sort order: + Map-reduce partition columns: _col1 (type: string) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE value expressions: _col0 (type: string), _col5 (type: string), _col6 (type: string) Reduce Operator Tree: Join Operator condition map: Inner Join 0 to 1 keys: 0 _col1 (type: string) 1 val (type: string) outputColumnNames: _col0, _col1, _col5, _col6, _col10, _col11 Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE Select Operator expressions: _col0 (type: string), _col1 (type: string), _col5 (type: string), _col6 (type: string), _col10 (type: string), _col11 (type: string) outputColumnNames: _col0, _col1, _col2, _col3, _col4, _col5 Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE File Output Operator compressed: false Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE table: input format: org.apache.hadoop.mapred.TextInputFormat output format: org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat serde: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe Stage: Stage-5 Map Reduce Map Operator Tree: TableScan alias: a Statistics: Num rows: 0 Data size: 30 Basic stats: PARTIAL Column stats: NONE Filter Operator predicate: ((key is not null and val is not null) and (not (key = '2'))) (type: boolean) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE Reduce Output Operator key expressions: key (type: string) sort order: + Map-reduce partition columns: key (type: string) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE value expressions: val (type: string) TableScan alias: b Statistics: Num rows: 0 Data size: 30 Basic stats: PARTIAL Column stats: NONE Filter Operator predicate: (key is not null and (not (key = '2'))) (type: boolean) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE Reduce Output Operator key expressions: key (type: string) sort order: + Map-reduce partition columns: key (type: string) Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE value expressions: val (type: string) Reduce Operator Tree: Join Operator condition map: Inner Join 0 to 1 outputColumnNames: _col0, _col1, _col5, _col6 Statistics: Num rows: 0 Data size: 0 Basic stats: NONE Column stats: NONE File Output Operator compressed: false table: input format: org.apache.hadoop.mapred.SequenceFileInputFormat output format: org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat serde: org.apache.hadoop.hive.serde2.lazybinary.LazyBinarySerDe Stage: Stage-0 Fetch Operator limit: -1 Processor Tree: ListSink PREHOOK: query: select * from T1 a join T2 b on a.key = b.key join T3 c on a.val = c.val order by a.key, b.key, a.val, b.val PREHOOK: type: QUERY PREHOOK: Input: default@t1 PREHOOK: Input: default@t2 PREHOOK: Input: default@t3 #### A masked pattern was here #### POSTHOOK: query: select * from T1 a join T2 b on a.key = b.key join T3 c on a.val = c.val order by a.key, b.key, a.val, b.val POSTHOOK: type: QUERY POSTHOOK: Input: default@t1 POSTHOOK: Input: default@t2 POSTHOOK: Input: default@t3 #### A masked pattern was here #### 2 12 2 22 2 12