| --! qt:dataset:srcpart |
| set hive.mapred.mode=nonstrict; |
| set hive.exec.dynamic.partition=true; |
| set hive.input.format=org.apache.hadoop.hive.ql.io.HiveInputFormat; |
| set hive.merge.mapfiles=false; |
| set hive.merge.mapredfiles=false; |
| set mapred.input.dir.recursive=true; |
| |
| -- list bucketing DML : static partition and 2 stage query plan. |
| |
| |
| -- create a skewed table |
| create table list_bucketing_static_part_n1 (key String, value String) partitioned by (ds String, hr String) skewed by (key) on ("484") stored as DIRECTORIES; |
| |
| -- list bucketing DML |
| explain extended |
| insert overwrite table list_bucketing_static_part_n1 partition (ds='2008-04-08', hr='11') select key, value from srcpart where ds='2008-04-08'; |
| insert overwrite table list_bucketing_static_part_n1 partition (ds='2008-04-08', hr='11') select key, value from srcpart where ds='2008-04-08'; |
| |
| -- check DML result |
| desc formatted list_bucketing_static_part_n1 partition (ds='2008-04-08', hr='11'); |
| |
| select count(1) from srcpart where ds='2008-04-08'; |
| select count(1) from list_bucketing_static_part_n1 where ds='2008-04-08'; |
| |
| select key, value from srcpart where ds='2008-04-08' and hr='11' and key = "484"; |
| set hive.optimize.listbucketing=true; |
| explain extended |
| select key, value from list_bucketing_static_part_n1 where ds='2008-04-08' and hr='11' and key = "484"; |
| select key, value from list_bucketing_static_part_n1 where ds='2008-04-08' and hr='11' and key = "484"; |
| -- clean up resources |
| drop table list_bucketing_static_part_n1; |