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Applying patch from SergeyV

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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.
This commit is contained in:
elliot@mysql.com
2006-06-20 13:43:13 -04:00
parent d0d32f7d11
commit 37e5ec9f50
3 changed files with 43 additions and 0 deletions
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26
mysql-test/t/lock_multi.test
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@@ -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