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Bug#7241 - Invalid response when DELETE .. USING and LOCK TABLES used.

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Only acquire necessary write lock for multi-delete
This commit is contained in:
acurtis@xiphis.org
2005-05-24 11:44:34 +01:00
parent 76a20eb397
commit a6a589ef76
3 changed files with 30 additions and 0 deletions
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10
mysql-test/r/lock.result
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@ -47,3 +47,13 @@ unlock tables;
lock tables t1 write, t1 as t1_alias read;
insert into t1 select index1,nr from t1 as t1_alias;
drop table t1,t2;
create table t1 ( a int(11) not null auto_increment, primary key(a));
create table t2 ( a int(11) not null auto_increment, primary key(a));
lock tables t1 write, t2 read;
delete from t1 using t1,t2 where t1.a=t2.a;
delete t1 from t1,t2 where t1.a=t2.a;
delete from t2 using t1,t2 where t1.a=t2.a;
ERROR HY000: Table 't2' was locked with a READ lock and can't be updated
delete t2 from t1,t2 where t1.a=t2.a;
ERROR HY000: Table 't2' was locked with a READ lock and can't be updated
drop table t1,t2;