I think this is the foreign key trigger timing issue.
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Darcy Buskermolen wrote:
> On Friday 09 September 2005 08:46, Stephan Szabo wrote:
> > On Fri, 9 Sep 2005, Tom Lane wrote:
> > > Stephan Szabo <sszabo@megazone.bigpanda.com> writes:
> > > > Is there a case other than a before trigger updating a row we will want
> > > > to act upon later in the statement where we'll get a row with xmax of
> > > > our transaction and cmax greater than the current command?
> > >
> > > The greater-cmax case could occur via any kind of function, not only a
> > > trigger, ie
> > >
> > > update tab set x = foo(x) where ...
> > >
> > > where foo() is a volatile function that internally updates the tab
> > > table.
> >
> > I *thought* I was missing a case, I just couldn't figure out what.
> >
> > > I suppose you could say that this is horrible programming practice and
> > > anyone who tries it deserves whatever weird behavior ensues ... but
> > > it's not the case that every such situation involves a trigger.
> >
> > Well, the change I was thinking of would have made it an error if foo(x)
> > updated a row that was then later selected by the update rather than the
> > current behavior which I think would have ignored the already updated row,
> > so that's probably not going to work.
>
> I see that this still is not addressed fulling in beta 3. Can anybody give a
> quick overview of where this is sitting, and if it's likely to make it's way
> into 8.1 gold ?
>
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> Darcy Buskermolen
> Wavefire Technologies Corp.
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