From b250722087ea2e99916c2b5bdfadbd51965f37cc Mon Sep 17 00:00:00 2001 From: unknown Date: Tue, 20 Jun 2006 13:43:13 -0400 Subject: Applying patch from SergeyV Fixes bug#17264, for alter table on win32 for successfull operation completion it is used TL_WRITE(=10) lock instead of TL_WRITE_ALLOW_READ(=6), however here in innodb handler TL_WRTIE is lifted to TL_WRITE_ALLOW_WRITE, which causes race condition when several clients do alter table simultaneously. mysql-test/r/lock_multi.result: Test case for bug#17264. mysql-test/t/lock_multi.test: Test case for bug#17264 --- mysql-test/t/lock_multi.test | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'mysql-test/t/lock_multi.test') diff --git a/mysql-test/t/lock_multi.test b/mysql-test/t/lock_multi.test index ee03088b8c3..905d0699e6a 100644 --- a/mysql-test/t/lock_multi.test +++ b/mysql-test/t/lock_multi.test @@ -171,4 +171,30 @@ use test; # connection default; +# +# Bug #17264: MySQL Server freeze +# +connection locker; +create table t1 (f1 int(12) unsigned not null auto_increment, primary key(f1)) engine=innodb; +lock tables t1 write; +connection writer; +--sleep 2 +delimiter //; +send alter table t1 auto_increment=0; alter table t1 auto_increment=0; alter table t1 auto_increment=0; alter table t1 auto_increment=0; alter table t1 auto_increment=0; // +delimiter ;// +connection reader; +--sleep 2 +delimiter //; +send alter table t1 auto_increment=0; alter table t1 auto_increment=0; alter table t1 auto_increment=0; alter table t1 auto_increment=0; alter table t1 auto_increment=0; // +delimiter ;// +connection locker; +--sleep 2 +unlock tables; +connection writer; +reap; +connection reader; +reap; +connection locker; +drop table t1; + # End of 5.0 tests -- cgit v1.2.1