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A fix and a test case for Bug#12734 " prepared statement may

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return incorrect result set for a select SQL request"
This commit is contained in:
konstantin@mysql.com
2006-01-14 04:55:07 +03:00
parent 977731b3fc
commit 48d48bc936
4 changed files with 71 additions and 0 deletions
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34
mysql-test/r/ps.result
View File

@@ -718,3 +718,37 @@ execute stmt;
drop table t1;
set names default;
deallocate prepare stmt;
create table t1 (
word_id mediumint(8) unsigned not null default '0',
formatted varchar(20) not null default ''
);
insert into t1 values
(80,'pendant'), (475,'pretendants'), (989,'tendances'),
(1019,'cependant'),(1022,'abondance'),(1205,'independants'),
(13,'lessiver'),(25,'lambiner'),(46,'situer'),(71,'terminer'),
(82,'decrocher');
select count(*) from t1 where formatted like '%NDAN%';
count(*)
6
select count(*) from t1 where formatted like '%ER';
count(*)
5
prepare stmt from "select count(*) from t1 where formatted like ?";
set @like="%NDAN%";
execute stmt using @like;
count(*)
6
set @like="%ER";
execute stmt using @like;
count(*)
5
set @like="%NDAN%";
execute stmt using @like;
count(*)
6
set @like="%ER";
execute stmt using @like;
count(*)
5
deallocate prepare stmt;
drop table t1;

30
mysql-test/t/ps.test
View File

@@ -746,5 +746,35 @@ drop table t1;
set names default;
deallocate prepare stmt;
#
# A test case for Bug#12734 "prepared statement may return incorrect result
# set for a select SQL request": test that canDoTurboBM is reset for each
# execute of a prepared statement.
#
create table t1 (
word_id mediumint(8) unsigned not null default '0',
formatted varchar(20) not null default ''
);
insert into t1 values
(80,'pendant'), (475,'pretendants'), (989,'tendances'),
(1019,'cependant'),(1022,'abondance'),(1205,'independants'),
(13,'lessiver'),(25,'lambiner'),(46,'situer'),(71,'terminer'),
(82,'decrocher');
select count(*) from t1 where formatted like '%NDAN%';
select count(*) from t1 where formatted like '%ER';
prepare stmt from "select count(*) from t1 where formatted like ?";
set @like="%NDAN%";
execute stmt using @like;
set @like="%ER";
execute stmt using @like;
set @like="%NDAN%";
execute stmt using @like;
set @like="%ER";
execute stmt using @like;
deallocate prepare stmt;
drop table t1;
# End of 4.1 tests

6
sql/item_cmpfunc.cc
View File

@@ -2524,6 +2524,12 @@ bool Item_func_like::fix_fields(THD *thd, TABLE_LIST *tlist, Item ** ref)
return 0;
}
void Item_func_like::cleanup()
{
canDoTurboBM= FALSE;
Item_bool_func2::cleanup();
}
#ifdef USE_REGEX
bool

1
sql/item_cmpfunc.h
View File

@@ -911,6 +911,7 @@ public:
cond_result eq_cmp_result() const { return COND_TRUE; }
const char *func_name() const { return "like"; }
bool fix_fields(THD *thd, struct st_table_list *tlist, Item **ref);
void cleanup();
};
#ifdef USE_REGEX