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Fixed bug mdev-5635.

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After constant row substitution some field items become constant items.
The range analyzer should take into account this fact when looking for
ranges.
This commit is contained in:
Igor Babaev
2014-02-27 13:54:05 -08:00
parent 472bc477f6
commit 1a536c8daf
3 changed files with 30 additions and 2 deletions
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11
mysql-test/r/join.result
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@@ -1538,3 +1538,14 @@ a
3
4
DROP TABLE t1,t2;
#
# MDEV-5635: join of a const table with non-const tables
#
CREATE TABLE t1 (a varchar(3) NOT NULL) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('foo');
CREATE TABLE t2 (b varchar(3), c varchar(3), INDEX(b)) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('bar', 'bar'),( 'qux', 'qux');
SELECT STRAIGHT_JOIN * FROM t1, t2 AS t2_1, t2 AS t2_2
WHERE t2_2.c = t2_1.c AND t2_2.b = t2_1.b AND ( a IS NULL OR t2_1.c = a );
a b c b c
DROP TABLE t1,t2;