Re: REFERENCES

Laszlo Tibor schrieb:
> 
> On Wednesday, March 13, 2002 11:53 AM Behalf Of Andre Schubert wrote:
> 
> > Hi to all,
> >
> > i have a simple problem and wont request assistance fro m this list.
> > i have to tables
> >
> > foo:
> >         id int8 UNIQUE
> >
> > bar:
> >         id int8 UNIQUE
> >         foo_id int8
> >
> > Now i wont foo_id to be a id which exists in the foo, this could be done
> > with foo_id REFERENCES foo (id).
> > But what should i do if i want foo_id to be a id existing in foo or to
> > be zero(0).
> > I have created a view as "select id from foo UNION select 0" and tried
> > to REFERENCE against this view, but that
> > doesnt work.
> > Can this problem be solved by a somebody ????
> >
> > Thanks
> 
> Why do you want to use zeros? A foreign key could be NULL.

Yes I know, but i need these Zeroes.....

Thanks

> 
> Regards, Tibor
> ltibor@mail.tiszanet.hu
> 
> ---------------------------(end of broadcast)---------------------------
> TIP 3: if posting/reading through Usenet, please send an appropriate
> subscribe-nomail command to majordomo@postgresql.org so that your
> message can get through to the mailing list cleanly