| --! qt:dataset:src |
| SET hive.vectorized.execution.enabled=false; |
| set hive.optimize.bucketmapjoin = true; |
| set hive.optimize.bucketmapjoin.sortedmerge = true; |
| |
| |
| set hive.exec.reducers.max = 1; |
| set hive.merge.mapfiles=false; |
| set hive.merge.mapredfiles=false; |
| |
| set hive.auto.convert.sortmerge.join.to.mapjoin=true; |
| |
| -- Create two bucketed and sorted tables |
| CREATE TABLE test_table1_n5 (key INT, value STRING) PARTITIONED BY (ds STRING) |
| CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS; |
| CREATE TABLE test_table2_n5 (key INT, value STRING) PARTITIONED BY (ds STRING) |
| CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS; |
| |
| FROM src |
| INSERT OVERWRITE TABLE test_table1_n5 PARTITION (ds = '1') SELECT *; |
| |
| -- Insert data into the bucketed table by selecting from another bucketed table |
| -- This should be a map-only operation |
| EXPLAIN |
| INSERT OVERWRITE TABLE test_table2_n5 PARTITION (ds = '1') |
| SELECT x.key, x.value from |
| ( |
| SELECT a.key, a.value FROM test_table1_n5 a WHERE a.ds = '1' |
| )x; |
| |
| INSERT OVERWRITE TABLE test_table2_n5 PARTITION (ds = '1') |
| SELECT x.key, x.value from |
| ( |
| SELECT a.key, a.value FROM test_table1_n5 a WHERE a.ds = '1' |
| )x; |
| |
| select count(*) from test_table2_n5 where ds = '1'; |
| select count(*) from test_table2_n5 tablesample (bucket 1 out of 2) s where ds = '1'; |
| select count(*) from test_table2_n5 tablesample (bucket 2 out of 2) s where ds = '1'; |
| |
| EXPLAIN |
| INSERT OVERWRITE TABLE test_table2_n5 PARTITION (ds = '1') |
| SELECT * from |
| ( |
| SELECT a.key, a.value FROM test_table1_n5 a WHERE a.ds = '1' |
| )x; |
| |
| INSERT OVERWRITE TABLE test_table2_n5 PARTITION (ds = '1') |
| SELECT * from |
| ( |
| SELECT a.key, a.value FROM test_table1_n5 a WHERE a.ds = '1' |
| )x; |
| |
| select count(*) from test_table2_n5 where ds = '1'; |
| select count(*) from test_table2_n5 tablesample (bucket 1 out of 2) s where ds = '1'; |
| select count(*) from test_table2_n5 tablesample (bucket 2 out of 2) s where ds = '1'; |
| |
| -- it should be a map-only job |
| EXPLAIN |
| INSERT OVERWRITE TABLE test_table2_n5 PARTITION (ds = '1') |
| SELECT x.key, concat(x.value, x.value) from |
| ( |
| SELECT a.key, a.value FROM test_table1_n5 a WHERE a.ds = '1' |
| )x; |
| |
| -- it should be a map-reduce job |
| EXPLAIN |
| INSERT OVERWRITE TABLE test_table2_n5 PARTITION (ds = '1') |
| SELECT x.key+x.key, x.value from |
| ( |
| SELECT a.key, a.value FROM test_table1_n5 a WHERE a.ds = '1' |
| )x; |
| |
| -- it should be a map-only job |
| EXPLAIN |
| INSERT OVERWRITE TABLE test_table2_n5 PARTITION (ds = '1') |
| SELECT x.k1, concat(x.v1, x.v1) from |
| ( |
| SELECT a.key as k1, a.value as v1 FROM test_table1_n5 a WHERE a.ds = '1' |
| )x; |