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Fix bug #14093 Query takes a lot of time when date format is not valid

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Invalid date like 2000-02-32 wasn't converted to int, which lead to not
using index and comparison with field as astring, which results in slow
query execution.

convert_constatn_item() and get_mm_leaf() now forces MODE_INVALID_DATES to
allow such conversion.
This commit is contained in:
evgen@moonbone.local
2005-11-03 13:53:49 +03:00
parent 0eacb6fb35
commit 30fdafea76
5 changed files with 72 additions and 1 deletions
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18
mysql-test/t/select.test
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@@ -2702,3 +2702,21 @@ select * from t1 join t2 left join t3 on (t1.a=t3.c);
select * from t1 join t2 right join t3 on (t1.a=t3.c);
select * from t1 join t2 straight_join t3 on (t1.a=t3.c);
drop table t1, t2 ,t3;
#
# Bug #14093 Query takes a lot of time when date format is not valid
# fix optimizes execution. so here we just check that returned set is
# correct.
create table t1(f1 int, f2 date);
insert into t1 values(1,'2005-01-01'),(2,'2005-09-01'),(3,'2005-09-30'),
(4,'2005-10-01'),(5,'2005-12-30');
# should return all records
select * from t1 where f2 >= 0;
select * from t1 where f2 >= '0000-00-00';
# should return 4,5
select * from t1 where f2 >= '2005-09-31';
select * from t1 where f2 >= '2005-09-3a';
# should return 1,2,3
select * from t1 where f2 <= '2005-09-31';
select * from t1 where f2 <= '2005-09-3a';
drop table t1;