| SET hive.vectorized.execution.enabled=true; |
| SET hive.vectorized.execution.reduce.enabled=true; |
| set hive.mapred.mode=nonstrict; |
| set hive.exec.reducers.max = 10; |
| set hive.map.groupby.sorted=true; |
| |
| -- SORT_QUERY_RESULTS |
| |
| CREATE TABLE T1_n2(key STRING, val STRING) PARTITIONED BY (ds string) |
| CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS STORED AS TEXTFILE; |
| |
| LOAD DATA LOCAL INPATH '../../data/files/bucket_files/000000_0' INTO TABLE T1_n2 PARTITION (ds='1'); |
| |
| -- perform an insert to make sure there are 2 files |
| INSERT OVERWRITE TABLE T1_n2 PARTITION (ds='1') select key, val from T1_n2 where ds = '1'; |
| |
| -- The plan is not converted to a map-side, since although the sorting columns and grouping |
| -- columns match, the user is issueing a distinct. |
| -- However, after HIVE-4310, partial aggregation is performed on the mapper |
| EXPLAIN VECTORIZATION DETAIL |
| select count(distinct key) from T1_n2; |
| select count(distinct key) from T1_n2; |
| |
| DROP TABLE T1_n2; |
