Matt <matt(at)kynx(dot)org> writes:
> I ask because I'm currently using them to join a single table to rows in
> arbitrary tables, something like:
>
> +-------------+
> | JOINME |
> +-------------+
> | foreign_oid |
> | foreign_id |
> | ... |
> +-------------+
>
> Where foreign_oid is the tableoid of the table and foreign_id is the
> (serial, not oid) id of the row in that table.
>
> I dunno if it's bad design, but it's darn handy.
How do you make use of this? It seems like you would need your code to know
which foreign_oid referred to which table to actually perform the join.
--
greg