| set hive.mapred.mode=nonstrict; |
| set hive.optimize.skewjoin.compiletime = true; |
| |
| CREATE TABLE T1_n140(key STRING, val STRING) STORED AS TEXTFILE; |
| |
| LOAD DATA LOCAL INPATH '../../data/files/T1.txt' INTO TABLE T1_n140; |
| |
| CREATE TABLE T2_n82(key STRING, val STRING) |
| SKEWED BY (key) ON ((3), (8)) STORED AS TEXTFILE; |
| |
| LOAD DATA LOCAL INPATH '../../data/files/T2.txt' INTO TABLE T2_n82; |
| |
| CREATE TABLE T3_n33(key STRING, val STRING) STORED AS TEXTFILE; |
| |
| LOAD DATA LOCAL INPATH '../../data/files/T3.txt' INTO TABLE T3_n33; |
| |
| -- This test is for validating skewed join compile time optimization for more than |
| -- 2 tables. The join key is the same, and so a 3-way join would be performed. |
| -- 1 of the 3 tables are skewed on the join key |
| -- adding a order by at the end to make the results deterministic |
| |
| EXPLAIN |
| SELECT a.*, b.*, c.* FROM T1_n140 a JOIN T2_n82 b ON a.key = b.key JOIN T3_n33 c on a.key = c.key; |
| |
| SELECT a.*, b.*, c.* FROM T1_n140 a JOIN T2_n82 b ON a.key = b.key JOIN T3_n33 c on a.key = c.key |
| ORDER BY a.key, b.key, c.key, a.val, b.val, c.val; |
