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regclass without error?

From: Tatsuo Ishii <ishii(at)postgresql(dot)org>
To: pgsql-hackers(at)postgresql(dot)org
Subject: regclass without error?
Date: 2010-09-03 08:28:35
Message-ID: 20100903.172835.87788062.t-ishii@sraoss.co.jp (view raw or flat)
Thread:
Lists: pgsql-hackers
Hi,

Is there any way to use regclass without having ERROR?

pgpool-II needs to find the oid from table name and for the purpose it
issues something like "SELECT 'table_name'::regproc::oid". Problem is,
if the table does not exist, an error occured and the transaction
aborts. Ideally if the table does not exist, the SELECT returns 0
(InvalidOid).

Any idea?
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese: http://www.sraoss.co.jp

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