Re: Referential constraints in version 8

Bob Smith <bsmith@h-e.com> writes:
> We have just finished upgrading Postgres from 7.2 to 8, and I must live
> right or something because there was only one glitch.  When the dump
> from 7.2 was restored into 8, some foreign key references which should
> have been initially deferred had become non-deferrable.  I had to
> re-define those references by dropping the corresponding triggers and
> using ALTER TABLE to put them back as foreign key constraints, which
> seems to have fixed the problem.  However, those references which I
> re-defined now show up explicitly in the table descriptions as foreign
> key constraints, and the corresponding triggers are not listed.  This
> is great since it makes the table descriptions much more intelligible,
> but my concern is that all the other references which I didn't
> re-define still show as triggers and not as foreign key constraints.
> Is this just a cosmetic issue with psql's table description, or is
> there actually a functional difference?  Should I re-define all the
> other foreign key constraints to be safe?

Yeah, you should --- if it shows as a trigger then the system hasn't
fully grokked it.  The contrib/adddepend script may help you.

            regards, tom lane