On 13.11.2007 20:57 CE(S)T, Baron Schwartz wrote: > It will absolutely lock SELECTs. Are you sure autocommit is set to 0 > and you have an open transaction? Are you sure your table is InnoDB? > I'm doing this right now: > > -- cxn 1 > mysql> set autocommit=0; > mysql> begin; > mysql> select * from t1 for update; > +------+ > | a | > +------+ > | 1 | > +------+ > 1 row in set (0.00 sec) > > -- cxn 2 > mysql> set autocommit=0; > mysql> begin; > mysql> select * from t1 for update;
Okay, my fault, I didn't use the "FOR UPDATE" in the second connection. If I do (which is likely to be the case in an application because there, the same code is run concurrently), the second SELECT locks. (The same is true when I select MAX(id) instead of *.) If I don't, it still works. Okay, so we have some table locking, tested, working. Very nice. Thank you for this one. :) > ERROR 1205 (HY000): Lock wait timeout exceeded; try restarting transaction -- Yves Goergen "LonelyPixel" <[EMAIL PROTECTED]> Visit my web laboratory at http://beta.unclassified.de -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
