| --! qt:dataset:src |
| set hive.mapred.mode=nonstrict; |
| set hive.exec.dynamic.partition.mode=strict; |
| |
| CREATE TABLE tmp(c1 INT, c2 INT, c3 STRING, c4 STRING); |
| INSERT OVERWRITE TABLE tmp |
| SELECT x.key, y.key, x.value, y.value FROM src x JOIN src y ON (x.key = y.key); |
| |
| set hive.optimize.correlation=true; |
| -- The query in this file have operators with same set of keys |
| -- but having different sorting orders. |
| -- Correlation optimizer currently do not optimize this case. |
| |
| EXPLAIN |
| SELECT xx.key1, xx.key2, yy.key1, yy.key2, xx.cnt, yy.cnt |
| FROM |
| (SELECT x.c1 AS key1, x.c3 AS key2, count(1) AS cnt FROM tmp x WHERE x.c1 < 120 GROUP BY x.c3, x.c1) xx |
| JOIN |
| (SELECT x1.c1 AS key1, x1.c3 AS key2, count(1) AS cnt FROM tmp x1 WHERE x1.c2 > 100 GROUP BY x1.c3, x1.c1) yy |
| ON (xx.key1 = yy.key1 AND xx.key2 == yy.key2) ORDER BY xx.key1, xx.key2, yy.key1, yy.key2, xx.cnt, yy.cnt; |
| |
