Re: Referential constraints in version 8

Bob Smith <bsmith(at)h-e(dot)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