Re: SELECT...FOR UPDATE

On Thu, 11 Jul 2002, Andreas Plesner Jacobsen wrote:

> On Thu, Jul 11, 2002 at 01:16:53PM -0700, Stephan Szabo wrote:
> > >
> > > SELECT table1.Id, table1.User, table1.Data1, table2.data1
> > > FROM table1, table2
> > > FOR UPDATE OF table1
> > > LIMIT 1000
> >
> > I don't think I understand the specification here. It sounds to me
> > you want to get the rows where User is null, but the above query
> > doesn't reflect that, so I must be misunderstanding.
>
> You're quite right, I missed the where clause there:
>
> WHERE table1.user is null and table1.fk_table2=table2.id
>
> > I'd suggest running with query printing turned on to see in more
> > detail what's going on.
>
> I know the exact query, so I don't see, where that would help?

It was more to see what other transactions were doing other than
the one running the above immediately before the deadlock.