| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | KaiGai Kohei <kaigai(at)ak(dot)jp(dot)nec(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: pg_comments |
| Date: | 2010-09-24 13:41:14 |
| Message-ID: | 13599.1285335674@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
KaiGai Kohei <kaigai(at)ak(dot)jp(dot)nec(dot)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
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