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manual merge 5.0-bugteam --> 5.1-bugteam

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This commit is contained in:
Gleb Shchepa 2009-04-28 05:27:38 +05:00
commit 755d312e84
3 changed files with 28 additions and 1 deletions
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13
mysql-test/r/select.result
View File

@ -4373,6 +4373,19 @@ f3 f4 count
1 abc 1
1 def 2
drop table t1, t2, t3;
CREATE TABLE t1 (a INT KEY, b INT);
INSERT INTO t1 VALUES (1,1), (2,2), (3,3), (4,4);
EXPLAIN EXTENDED SELECT a, b FROM t1 WHERE a > 1 AND a = b LIMIT 2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = `test`.`t1`.`a`) and (`test`.`t1`.`a` > 1)) limit 2
EXPLAIN EXTENDED SELECT a, b FROM t1 WHERE a > 1 AND b = a LIMIT 2;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t1`.`b`) and (`test`.`t1`.`a` > 1)) limit 2
DROP TABLE t1;
End of 5.0 tests
create table t1(a INT, KEY (a));
INSERT INTO t1 VALUES (1),(2),(3),(4),(5);

14
mysql-test/t/select.test
View File

@ -3726,6 +3726,20 @@ cr.f4 = cr2.f4
GROUP BY a.f3, cr.f4;
drop table t1, t2, t3;
#
# Bug #40925: Equality propagation takes non indexed attribute
#
CREATE TABLE t1 (a INT KEY, b INT);
INSERT INTO t1 VALUES (1,1), (2,2), (3,3), (4,4);
EXPLAIN EXTENDED SELECT a, b FROM t1 WHERE a > 1 AND a = b LIMIT 2;
EXPLAIN EXTENDED SELECT a, b FROM t1 WHERE a > 1 AND b = a LIMIT 2;
DROP TABLE t1;
--echo End of 5.0 tests
#

2
sql/item.cc
View File

@ -4468,7 +4468,7 @@ Item *Item_field::replace_equal_field(uchar *arg)
return const_item;
}
Item_field *subst= item_equal->get_first();
if (subst && !field->eq(subst->field))
if (subst && field->table != subst->field->table && !field->eq(subst->field))
return subst;
}
return this;