Alvaro Herrera <alvherre@alvh.no-ip.org> writes:
> Is there a reason we don't have t_self as one of the system columns that
> you can examine from SQL? I'd propose its addition otherwise.
pg_attribute bloat? I'm a bit hesitant to add a row per table for
something we've gotten along without for so long, especially something
with as bizarre a definition as "t_self" has got.
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.
regards, tom lane