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Merge mysql.com:/home/jimw/my/mysql-5.0-12689

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into  mysql.com:/home/jimw/my/mysql-5.0-clean
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2005-08-22 10:19:09 -07:00
parent 0b4ec2fb42 05001e7504
commit 0b93c1abe6
4 changed files with 54 additions and 0 deletions
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24
mysql-test/r/func_misc.result
View File

@ -70,3 +70,27 @@ select timediff(b, a) >= '00:00:03' from t1;
timediff(b, a) >= '00:00:03'
1
drop table t1;
set global query_cache_size=1355776;
create table t1 (a int);
insert into t1 values (1),(1),(1);
create table t2 (a datetime default null, b datetime default null);
insert into t2 set a = now();
select a from t1 where sleep(1);
a
update t2 set b = now() where b is null;
insert into t2 set a = now();
select a from t1 where sleep(a);
a
update t2 set b = now() where b is null;
insert into t2 set a = now();
select a from t1 where sleep(1);
a
update t2 set b = now() where b is null;
select timediff(b, a) >= '00:00:03' from t2;
timediff(b, a) >= '00:00:03'
1
1
1
drop table t2;
drop table t1;
set global query_cache_size=default;

23
mysql-test/t/func_misc.test
View File

@ -55,3 +55,26 @@ select sleep(3);
update t1 set b = now();
select timediff(b, a) >= '00:00:03' from t1;
drop table t1;
#
# Bug #12689: SLEEP() gets incorrectly cached/optimized-away
#
set global query_cache_size=1355776;
create table t1 (a int);
insert into t1 values (1),(1),(1);
create table t2 (a datetime default null, b datetime default null);
insert into t2 set a = now();
select a from t1 where sleep(1);
update t2 set b = now() where b is null;
insert into t2 set a = now();
select a from t1 where sleep(a);
update t2 set b = now() where b is null;
insert into t2 set a = now();
select a from t1 where sleep(1);
update t2 set b = now() where b is null;
select timediff(b, a) >= '00:00:03' from t2;
drop table t2;
drop table t1;
set global query_cache_size=default;
# End of 5.0 tests

1
sql/item_create.cc
View File

@ -356,6 +356,7 @@ Item *create_func_sha(Item* a)
Item *create_func_sleep(Item* a)
{
current_thd->lex->uncacheable(UNCACHEABLE_SIDEEFFECT);
return new Item_func_sleep(a);
}

6
sql/item_func.h
View File

@ -893,7 +893,13 @@ class Item_func_sleep :public Item_int_func
{
public:
Item_func_sleep(Item *a) :Item_int_func(a) {}
bool const_item() const { return 0; }
const char *func_name() const { return "sleep"; }
void update_used_tables()
{
Item_int_func::update_used_tables();
used_tables_cache|= RAND_TABLE_BIT;
}
longlong val_int();
};