Re: t_self as system column

Robert Haas <robertmhaas@gmail.com> writes:
> On Mon, Jul 5, 2010 at 2:08 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> At one time I was hoping to get rid of explicit entries in pg_attribute
>> for system columns, which would negate this concern. �I think we're
>> stuck with them now, though, because of per-column permissions.

> Because someone might want to grant per-column permissions on those
> columns?  That seems like an awfully thin reason to keep all that
> bloat around.  I bet the number of people who have granted per-column
> permissions on, say, cmax can be counted on one hand - possibly with
> five fingers left over.

I'd agree with that argument for the most part, but I'm not entirely
sure about oid, which has some characteristics of a user-data column.

(OTOH, maybe we could allow just oid to retain an explicit pg_attribute
entry... could be messy though.)
        regards, tom lane