Re: [PHP-DB] mysqli auto rollback on script termination
Reason I'm asking is, I've seen some deadlock issues in a script (using FOR UPDATE and LOCK IN SHARE MODE), that looks like they are caused by transactions not being rolled back (releasing locks) correctly. Do you use pconnect? If I right remember there was a bug in some version of mysql that in the case of using pconnect in some cases the automatic rollback didn't happen. The solution was: after pconnect one had to start with a rollback command. Regards, Felhő -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] mysqli auto rollback on script termination
Chris skrev: It doesn't explicitly say anything about when a connection is lost but I'm guessing it would rollback the transaction (well I'd sure hope so). Me too. In any case, I'm now also using register_shutdown_function, which calls a function that does rollback of not committed transations. Thanks. -- Martin - http://925.dk "Shoot for the moon, even if you miss, you'll land among the stars." -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] mysqli auto rollback on script termination
Martin Koch Andersen wrote: Chris skrev: It should be rolled back when a connection is lost or a transaction isn't explicitly committed. Can you find documentation on this specific issue anywhere? I think the same as you, but I find it odd, it is not documented. Reason I'm asking is, I've seen some deadlock issues in a script (using FOR UPDATE and LOCK IN SHARE MODE), that looks like they are caused by transactions not being rolled back (releasing locks) correctly. This suggests they should be released: http://dev.mysql.com/doc/refman/4.1/en/innodb-locking-reads.html Locks set by IN SHARE MODE and FOR UPDATE reads are released when the transaction is committed or rolled back. It doesn't explicitly say anything about when a connection is lost but I'm guessing it would rollback the transaction (well I'd sure hope so). -- Postgresql & php tutorials http://www.designmagick.com/ -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] mysqli auto rollback on script termination
Chris skrev: It should be rolled back when a connection is lost or a transaction isn't explicitly committed. Can you find documentation on this specific issue anywhere? I think the same as you, but I find it odd, it is not documented. Reason I'm asking is, I've seen some deadlock issues in a script (using FOR UPDATE and LOCK IN SHARE MODE), that looks like they are caused by transactions not being rolled back (releasing locks) correctly. -- Martin - http://925.dk "Shoot for the moon, even if you miss, you'll land among the stars." -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] mysqli auto rollback on script termination
Martin Koch Andersen wrote: Hi, In case the PHP script dies (from fatal error, die() or similar), is any started transaction (BEGIN TRANSACTION) automatically rolled back (ROLLBACK) by PHP then? It should be rolled back when a connection is lost or a transaction isn't explicitly committed. Whether that's a php script dying or the server being shut down mid-transaction or anything similar (eg a remote server's lan connection goes down). Of course this assumes you're using innodb tables and not myisam - myisam doesn't support transactions.. -- Postgresql & php tutorials http://www.designmagick.com/ -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP-DB] mysqli auto rollback on script termination
Hi, In case the PHP script dies (from fatal error, die() or similar), is any started transaction (BEGIN TRANSACTION) automatically rolled back (ROLLBACK) by PHP then? I can't find any documentation about this. Thanks in advance for hints, links etc. -- Martin - http://925.dk "Shoot for the moon, even if you miss, you'll land among the stars." -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
