On Tue, 15 Aug 2000, Michael Peppler wrote:
> Matt Sergeant writes:
> > On Tue, 15 Aug 2000, Vladislav Safronov wrote:
> >
> > > Ok. I think, the answers clear the problem, but I have yet more question.
> > >
> > > What can you say about this code? is it ok (overwriting previous handle)?
> >
> > [snip]
> >
> > Well it depends on the DBMS. For example Sybase might not like it if you
> > haven't read everything from the $sth first - it will bite you in the bum
> > with locks. Others will be fine. So just be careful...
>
> Actually what happens with Sybase is this:
>
> If $sth has pending results when prepare() is called DBD::Sybase opens
> a new connection (because it sees that the $dbh already has an active
> $sth). When the return value from prepare() is assigned to $sth the
> DESTROY method for the old $sth is called, which cancels the previous
> query.
>
> So I think that you *should* be safe from deadlocks, but the problem
> will be getting additional connections created, which is not really
> optimal.
Isn't there something different happening when AutoCommit = 0 though?
--
<Matt/>
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