Horton

Re: pg_comments

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: KaiGai Kohei <kaigai@ak.jp.nec.com>
Cc: Robert Haas <robertmhaas@gmail.com>, pgsql-hackers@postgresql.org
Date: 2010-09-24T13:41:14Z
Lists: pgsql-hackers 
KaiGai Kohei <kaigai@ak.jp.nec.com> writes:
> It seems to me the query should be fixed up as follows:

> 	:
> WHERE
> 	d.classoid = (SELECT oid FROM pg_class WHERE relname = 'pg_largeobject'
> 		      AND relnamespace = (SELECT oid FROM pg_namespace
> 					  WHERE nspname = 'pg_catalog'))
> 	:

Actually, the preferred way to spell that sort of thing is

	WHERE
		d.classoid = 'pg_catalog.pg_largeobject'::regclass

which is not only shorter but orders of magnitude more efficient.

			regards, tom lane