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Fixed bug mdev-4418.

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After single row substitutions there might appear new equalities.
They should be properly propagated to all AND/OR levels the WHERE
condition. It's done now with an additional call of remove_eq_conds().
This commit is contained in:
Igor Babaev
2013-08-16 22:01:47 -07:00
parent 752d5d022d
commit 25c152018d
14 changed files with 98 additions and 10 deletions
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18
mysql-test/r/select.result
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@ -5217,4 +5217,22 @@ Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`
SELECT * FROM t1 WHERE (b = 1 OR a = 5) AND (b = 5 AND a = 5 OR 1 != 1);
a b
DROP TABLE t1;
#
# Bug mdev-4418: impossible multiple equality in OR formula
# after row substitution
#
CREATE TABLE t1 (a int, b varchar(1)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (0,'j'), (8,'v');
CREATE TABLE t2 (c varchar(1), d varchar(1)) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('k','k');
EXPLAIN EXTENDED
SELECT * FROM t1, t2 WHERE c=b AND (1=2 OR ((b='h' OR a=136) AND d=b));
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 system NULL NULL NULL NULL 1 100.00
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,'k' AS `c`,'k' AS `d` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`b` = 'k') and (`test`.`t1`.`a` = 136))
SELECT * FROM t1, t2 WHERE c=b AND (1=2 OR ((b='h' OR a=136) AND d=b));
a b c d
DROP TABLE t1,t2;
End of 5.3 tests