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Re: t_self as system column

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: t_self as system column
Date: 2010-07-05 18:08:07
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Lists: pgsql-hackers
Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)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

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