| --! qt:dataset:part |
| |
| SET hive.vectorized.execution.enabled=false; |
| set hive.strict.checks.bucketing=false; |
| |
| set hive.input.format=org.apache.hadoop.hive.ql.io.HiveInputFormat; |
| |
| CREATE TABLE srcbucket_mapjoin_part_1_n5 (key INT, value STRING) PARTITIONED BY (part STRING) |
| CLUSTERED BY (key) INTO 2 BUCKETS STORED AS TEXTFILE; |
| LOAD DATA LOCAL INPATH '../../data/files/bmj/000000_0' INTO TABLE srcbucket_mapjoin_part_1_n5 PARTITION (part='1'); |
| LOAD DATA LOCAL INPATH '../../data/files/bmj/000001_0' INTO TABLE srcbucket_mapjoin_part_1_n5 PARTITION (part='1'); |
| |
| CREATE TABLE srcbucket_mapjoin_part_2_n12 (key INT, value STRING) PARTITIONED BY (part STRING) |
| CLUSTERED BY (key) INTO 3 BUCKETS STORED AS TEXTFILE; |
| LOAD DATA LOCAL INPATH '../../data/files/bmj/000000_0' INTO TABLE srcbucket_mapjoin_part_2_n12 PARTITION (part='1'); |
| LOAD DATA LOCAL INPATH '../../data/files/bmj/000001_0' INTO TABLE srcbucket_mapjoin_part_2_n12 PARTITION (part='1'); |
| LOAD DATA LOCAL INPATH '../../data/files/bmj/000002_0' INTO TABLE srcbucket_mapjoin_part_2_n12 PARTITION (part='1'); |
| |
| ALTER TABLE srcbucket_mapjoin_part_2_n12 CLUSTERED BY (key) INTO 2 BUCKETS; |
| |
| set hive.optimize.bucketmapjoin=true; |
| |
| set hive.cbo.enable=false; |
| -- The table bucketing metadata matches but the partitions have different numbers of buckets, bucket map join should not be used |
| |
| EXPLAIN EXTENDED |
| SELECT /*+ MAPJOIN(b) */ count(*) |
| FROM srcbucket_mapjoin_part_1_n5 a JOIN srcbucket_mapjoin_part_2_n12 b |
| ON a.key = b.key AND a.part = '1' and b.part = '1'; |
| |
| SELECT /*+ MAPJOIN(b) */ count(*) |
| FROM srcbucket_mapjoin_part_1_n5 a JOIN srcbucket_mapjoin_part_2_n12 b |
| ON a.key = b.key AND a.part = '1' and b.part = '1'; |
| |
| ALTER TABLE srcbucket_mapjoin_part_2_n12 DROP PARTITION (part='1'); |
| ALTER TABLE srcbucket_mapjoin_part_2_n12 CLUSTERED BY (value) INTO 2 BUCKETS; |
| LOAD DATA LOCAL INPATH '../../data/files/bmj/000000_0' INTO TABLE srcbucket_mapjoin_part_2_n12 PARTITION (part='1'); |
| LOAD DATA LOCAL INPATH '../../data/files/bmj/000001_0' INTO TABLE srcbucket_mapjoin_part_2_n12 PARTITION (part='1'); |
| |
| ALTER TABLE srcbucket_mapjoin_part_2_n12 CLUSTERED BY (key) INTO 2 BUCKETS; |
| |
| -- The table bucketing metadata matches but the partitions are bucketed on different columns, bucket map join should not be used |
| |
| EXPLAIN EXTENDED |
| SELECT /*+ MAPJOIN(b) */ count(*) |
| FROM srcbucket_mapjoin_part_1_n5 a JOIN srcbucket_mapjoin_part_2_n12 b |
| ON a.key = b.key AND a.part = '1' AND b.part = '1'; |
| |
| SELECT /*+ MAPJOIN(b) */ count(*) |
| FROM srcbucket_mapjoin_part_1_n5 a JOIN srcbucket_mapjoin_part_2_n12 b |
| ON a.key = b.key AND a.part = '1' AND b.part = '1'; |