Re: Re: [HACKERS] Postgresql OO Patch

Mike Mascari wrote:

> At a minimum, it seems to me, the backend must support the
> concept of multiple tuples with different attributes at the
> relation level since concurrency and rollback-ability of ALTER
> TABLE ADD COLUMN will cause two concurrent transactions to see a
> single relation with different attributes. It doesn't seem a
> large leap to support this concept for OO purposes from "leaf" to
> "base". For "base" to "leaf" type queries, wouldn't it be
> acceptable to return the base attributes only, as long as the
> equivalent of run-time type information could be had from the
> OID?

How are you going to be able to go shape.display() and have it work for
a triangle, if the triangle's apex's weren't retrieved?