| --! 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_n19 (key INT, value STRING) PARTITIONED BY (ds STRING) |
| CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS; |
| CREATE TABLE test_table2_n18 (value STRING, key INT) PARTITIONED BY (ds STRING) |
| CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS; |
| |
| FROM src |
| INSERT OVERWRITE TABLE test_table1_n19 PARTITION (ds = '1') SELECT *; |
| |
| -- Insert data into the bucketed table by selecting from another bucketed table |
| -- The bucketing positions dont match - although the actual bucketing do. |
| -- This should be a map-only operation |
| EXPLAIN |
| INSERT OVERWRITE TABLE test_table2_n18 PARTITION (ds = '1') |
| SELECT x.value, x.key from |
| (SELECT a.key, a.value FROM test_table1_n19 a WHERE a.ds = '1')x; |
| |
| INSERT OVERWRITE TABLE test_table2_n18 PARTITION (ds = '1') |
| SELECT x.value, x.key from |
| (SELECT a.key, a.value FROM test_table1_n19 a WHERE a.ds = '1')x; |
| |
| select count(*) from test_table2_n18 where ds = '1'; |
| select count(*) from test_table2_n18 tablesample (bucket 1 out of 2) s where ds = '1'; |
| select count(*) from test_table2_n18 tablesample (bucket 2 out of 2) s where ds = '1'; |
| |
| CREATE TABLE test_table3_n10 (key INT, value STRING) PARTITIONED BY (ds STRING) |
| CLUSTERED BY (value) SORTED BY (value) INTO 2 BUCKETS; |
| |
| -- Insert data into the bucketed table by selecting from another bucketed table |
| -- The bucketing positions dont match - this should be a map-reduce operation |
| EXPLAIN |
| INSERT OVERWRITE TABLE test_table2_n18 PARTITION (ds = '1') |
| SELECT x.key, x.value from |
| (SELECT a.key, a.value FROM test_table1_n19 a WHERE a.ds = '1')x; |
| |
| INSERT OVERWRITE TABLE test_table2_n18 PARTITION (ds = '1') |
| SELECT x.key, x.value from |
| (SELECT a.key, a.value FROM test_table1_n19 a WHERE a.ds = '1')x; |
| |
| select count(*) from test_table2_n18 where ds = '1'; |
| select count(*) from test_table2_n18 tablesample (bucket 1 out of 2) s where ds = '1'; |
| select count(*) from test_table2_n18 tablesample (bucket 2 out of 2) s where ds = '1'; |