| --! 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 : dynamic partition and 2 stage query plan. |
| |
| |
| -- create a skewed table |
| create table list_bucketing_dynamic_part_n0 (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_dynamic_part_n0 partition (ds='2008-04-08', hr) select key, value, hr from srcpart where ds='2008-04-08'; |
| insert overwrite table list_bucketing_dynamic_part_n0 partition (ds='2008-04-08', hr) select key, value, hr from srcpart where ds='2008-04-08'; |
| |
| -- check DML result |
| desc formatted list_bucketing_dynamic_part_n0 partition (ds='2008-04-08', hr='11'); |
| desc formatted list_bucketing_dynamic_part_n0 partition (ds='2008-04-08', hr='12'); |
| |
| select count(1) from srcpart where ds='2008-04-08'; |
| select count(1) from list_bucketing_dynamic_part_n0 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_dynamic_part_n0 where ds='2008-04-08' and hr='11' and key = "484"; |
| select key, value from list_bucketing_dynamic_part_n0 where ds='2008-04-08' and hr='11' and key = "484"; |
| |
| -- clean up resources |
| drop table list_bucketing_dynamic_part_n0; |
| |