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This commit is contained in:
Igor Babaev 2011-12-13 14:28:53 -08:00
commit 7229af3034
3 changed files with 68 additions and 3 deletions
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31
mysql-test/t/subselect2.test
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@ -172,5 +172,36 @@ SELECT t1.* FROM t1 WHERE (SELECT COUNT(*) FROM t3,t2 WHERE t3.c=t2.a
DROP TABLE t1,t2,t3;
--echo #
--echo # Bug #902356: DISTINCT in materialized subquery
--echo #
CREATE TABLE t1 (pk int PRIMARY KEY, a int, KEY(a)) ENGINE=InnoDB;
INSERT INTO t1 VALUES (0, 4), (8, 6);
CREATE TABLE t2 (pk int PRIMARY KEY, a int, KEY(a)) ENGINE=InnoDB;
INSERT INTO t2 VALUES (0, 4), (8, 6);
CREATE TABLE t3 (b INT, KEY(b));
INSERT INTO t3 VALUES (7), (0), (4), (2);
CREATE VIEW v1 AS SELECT * FROM t1;
SET @tmp_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='materialization=on,in_to_exists=on';
EXPLAIN
SELECT * FROM t2,t3 WHERE (2,9) IN (SELECT DISTINCT a,pk FROM t1) OR a = b;
SELECT * FROM t2,t3 WHERE (2,9) IN (SELECT DISTINCT a,pk FROM t1) OR a = b;
EXPLAIN
SELECT * FROM t2,t3 WHERE (2,9) IN (SELECT DISTINCT a,pk FROM v1) OR a = b;
SELECT * FROM t2,t3 WHERE (2,9) IN (SELECT DISTINCT a,pk FROM v1) OR a = b;
SET optimizer_switch=@tmp_optimizer_switch;
DROP VIEW v1;
DROP TABLE t1,t2,t3;
set optimizer_switch=@subselect2_test_tmp;