On 13.11.2007 16:37 CE(S)T, mark addison wrote:
> As your using InnoDB, which has row level locking a SELECT ... FOR
> UPDATE should work.
> http://dev.mysql.com/doc/refman/4.1/en/innodb-locking-reads.html
> e.g.
>
> BEGIN TRANSACTION
> new_id := (SELECT MAX(id) FROM table FOR UPDATE) + 1
> -- some more work here
> INSERT INTO table (id, ...) VALUES (new_id, ...)
> COMMIT
Row level locking can only lock rows that exist. Creating new rows (that
would have an influence on my MAX value) are still possible and thus row
level locking is not what I need. I really need locking an entire table
for every other read or write access.
--
Yves Goergen "LonelyPixel" <nospam.list@stripped>
Visit my web laboratory at http://beta.unclassified.de
