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Fixed LP bug #707555.

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The bug was in the code of the patch fixing bug 698882.
With improper casting the method store_key_field::change_source_field
was called for the elements of the array TABLE_REF::key_copy that
were either of a different type or not allocated at all. This caused
crashes in some queries.
This commit is contained in:
Igor Babaev
2011-01-26 11:30:29 -08:00
parent 1f970d41e8
commit a624f99e98
6 changed files with 179 additions and 5 deletions
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40
mysql-test/r/select.result
View File

@ -4977,4 +4977,44 @@ a1 b1 a2 b2 a3 b3
2 xx 2 yy 2 zzz
SET SESSION optimizer_switch=DEFAULT;
DROP TABLE t1,t2,t3;
#
# Bug #707555: crash with equality substitution in ref
#
CREATE TABLE t1 (f11 int, f12 int, PRIMARY KEY (f11), KEY (f12)) ;
INSERT INTO t1 VALUES (1,NULL), (8,NULL);
CREATE TABLE t2 (f21 int, f22 int, f23 int, KEY (f22)) ;
INSERT INTO t2 VALUES (1,NULL,3), (2,7,8);
CREATE TABLE t3 (f31 int, f32 int(11), PRIMARY KEY (f31), KEY (f32)) ;
INSERT INTO t3 VALUES (1,494862336);
CREATE TABLE t4 (f41 int, f42 int, PRIMARY KEY (f41), KEY (f42)) ;
INSERT INTO t4 VALUES (1,NULL), (8,NULL);
CREATE TABLE t5 (f51 int, PRIMARY KEY (f51)) ;
INSERT IGNORE INTO t5 VALUES (100);
CREATE TABLE t6 (f61 int, f62 int, KEY (f61)) ;
INSERT INTO t6 VALUES (NULL,1), (3,10);
CREATE TABLE t7 (f71 int, f72 int, KEY (f72)) ;
INSERT INTO t7 VALUES (1,NULL), (2,7);
EXPLAIN
SELECT t2.f23 FROM
(t1 LEFT JOIN (t2 JOIN t3 ON t2.f22=t3.f32) ON t1.f11=t3.f31)
LEFT JOIN
(((t4 JOIN t5 ON t4.f42=t5.f51) LEFT JOIN t6 ON t6.f62>0) JOIN t7 ON t6.f61>0)
ON t3.f31 = t6.f61
WHERE t7.f71>0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 system PRIMARY,f32 NULL NULL NULL 1
1 SIMPLE t5 system PRIMARY NULL NULL NULL 1
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index
1 SIMPLE t2 ref f22 f22 5 const 1
1 SIMPLE t6 ref f61 f61 5 const 1 Using where
1 SIMPLE t4 ref f42 f42 5 const 1 Using index
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
SELECT t2.f23 FROM
(t1 LEFT JOIN (t2 JOIN t3 ON t2.f22=t3.f32) ON t1.f11=t3.f31)
LEFT JOIN
(((t4 JOIN t5 ON t4.f42=t5.f51) LEFT JOIN t6 ON t6.f62>0) JOIN t7 ON t6.f61>0)
ON t3.f31 = t6.f61
WHERE t7.f71>0;
f23
DROP TABLE t1,t2,t3,t4,t5,t6,t7;
End of 5.1 tests