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Fixed the bug mdev-12429 and its duplicates mdev-12145 and mdev-9886.

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Also fixed a wrong result for a test case for mdev-7691
(the alternative one).
The test  cases for all these bug have materialized semi-joins used
inside dependent sub-queries.

The patch actually reverts the change inroduced by Monty in 2003.
It looks like this change is not valid anymore after the implementation
of semi-joins.
Adjusted output from EXPLAIN for many other test cases.
This commit is contained in:
Igor Babaev
2017-04-04 10:04:52 -07:00
parent a821ef7605
commit b0395d8701
15 changed files with 329 additions and 22 deletions
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2
mysql-test/r/subselect_innodb.result
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@ -273,7 +273,7 @@ EXPLAIN SELECT 1 FROM t1 WHERE NOT EXISTS
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 1 Using where
2 DEPENDENT SUBQUERY t2 eq_ref PRIMARY,d d 2 func 1 Using where
3 DEPENDENT SUBQUERY t2 index NULL d 2 NULL 1 Using where; Using index
3 DEPENDENT SUBQUERY t2 index NULL d 2 NULL 1 Using index
DROP TABLE t2;
CREATE TABLE t2 (b INT, c INT, UNIQUE KEY (b), UNIQUE KEY (b, c )) ENGINE=INNODB;
INSERT INTO t2 VALUES (1, 1);