Am Mittwoch, 10. Mai 2006 08:19 schrieb Tom Lane:
> Dennis Bjorklund <db@zigo.dhs.org> writes:
> > Yesterday I helped a guy on irc with a locking problem, he thought
> > that locking in postgresql was broken. It turned out that he had a PHP
> > function that he called inside his transaction and the function did BEGIN
> > and COMMIT. Since BEGIN inside a transaction is just a warning what
> > happend was that the inner COMMIT ended the transaction and
> > released the locks. The rest of his commands ran with autocommit
> > and no locks and he got broken data into the database.
> >
> > Could we make BEGIN fail when we already are in a transaction?
>
> We could, but it'd probably break about as many apps as it fixed.
> I wonder whether php shouldn't be complaining about this, instead
> --- doesn't php have its own ideas about controlling where the
> transaction commit points are?
In fact it would break many application, so it should be at least controllable
by a setting or GUC.