Re: how to find foreign key details (column, that is)

On Wed, Jan 21, 2009 at 01:49:44PM -0500, Bruce Momjian wrote:

> Tom Lane wrote:
> > Karsten Hilbert <Karsten(dot)Hilbert(at)gmx(dot)net> writes:
> > > This is what my 8.3 manual says:
> >
> > > conkey │ int2[] │ pg_attribute.attnum │ If a table constraint, list of columns which the constraint constrains │
> >
> > > From that I wouldn't have figured it'd apply to foreign keys
> > > as well. So I assume it is fair to say that "foreign keys
> > > are one type of table constraint", right ?
> >
> > Right. I think what the comment is actually trying to point out is that
> > conkey isn't relevant to domain constraints, which also appear in
> > pg_constraint.
>
> Can someone come up with better documention wording for conkey? I
> can't:
>
> http://developer.postgresql.org/pgdocs/postgres/catalog-pg-constraint.html

How about adding a second line:

"Note: since foreign keys are table constraints, applies to those, too."

or

"If a foreign key, list of columns referencing the target table"

(note, "referencing" as opposed to "referenced by" as in confkey)

Karsten
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