| --! qt:dataset:part |
| set hive.strict.checks.bucketing=false; |
| |
| set hive.mapred.mode=nonstrict; |
| -- small 1 part, 4 bucket & big 2 part, 2 bucket |
| CREATE TABLE bucket_small_n8 (key string, value string) partitioned by (ds string) CLUSTERED BY (key) SORTED BY (key) INTO 4 BUCKETS STORED AS TEXTFILE |
| TBLPROPERTIES('bucketing_version'='1'); |
| load data local inpath '../../data/files/auto_sortmerge_join/big/000000_0' INTO TABLE bucket_small_n8 partition(ds='2008-04-08'); |
| load data local inpath '../../data/files/auto_sortmerge_join/big/000001_0' INTO TABLE bucket_small_n8 partition(ds='2008-04-08'); |
| load data local inpath '../../data/files/auto_sortmerge_join/big/000002_0' INTO TABLE bucket_small_n8 partition(ds='2008-04-08'); |
| load data local inpath '../../data/files/auto_sortmerge_join/big/000003_0' INTO TABLE bucket_small_n8 partition(ds='2008-04-08'); |
| |
| CREATE TABLE bucket_big_n8 (key string, value string) partitioned by (ds string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS STORED AS TEXTFILE |
| TBLPROPERTIES('bucketing_version'='1'); |
| load data local inpath '../../data/files/auto_sortmerge_join/big/000000_0' INTO TABLE bucket_big_n8 partition(ds='2008-04-08'); |
| load data local inpath '../../data/files/auto_sortmerge_join/big/000001_0' INTO TABLE bucket_big_n8 partition(ds='2008-04-08'); |
| |
| load data local inpath '../../data/files/auto_sortmerge_join/big/000000_0' INTO TABLE bucket_big_n8 partition(ds='2008-04-09'); |
| load data local inpath '../../data/files/auto_sortmerge_join/big/000001_0' INTO TABLE bucket_big_n8 partition(ds='2008-04-09'); |
| set hive.cbo.enable=false; |
| set hive.optimize.bucketmapjoin = true; |
| explain extended select /*+ MAPJOIN(a) */ count(*) FROM bucket_small_n8 a JOIN bucket_big_n8 b ON a.key = b.key; |
| select /*+ MAPJOIN(a) */ count(*) FROM bucket_small_n8 a JOIN bucket_big_n8 b ON a.key = b.key; |
| |
| set hive.optimize.bucketmapjoin.sortedmerge = true; |
| explain extended select /*+ MAPJOIN(a) */ count(*) FROM bucket_small_n8 a JOIN bucket_big_n8 b ON a.key = b.key; |
| select /*+ MAPJOIN(a) */ count(*) FROM bucket_small_n8 a JOIN bucket_big_n8 b ON a.key = b.key; |
