From: Daniel CAUNE <d.caune@free.fr>
To: pgsql-sql@postgresql.org
Subject: Evaluation of if conditions
Date: Wed, 06 Sep 2006 18:32:40 -0400
Message-ID: <001601c6d204$5d2cd840$0b00a8c0@tedy> (raw)
Hi,
How does the IF statement evaluate conditions? Does it evaluate conditions
following their declaration order from left to right? In case of
or-conditions, does the IF statement stop evaluating conditions whenever a
first or-condition is true?
The following snippet seems to be invalid, which let me think that PL/PGSQL
evaluates all the conditions:
IF (TG_OP = 'INSERT') OR
(OLD.bar = ...) THEN
statement
END IF;
Should be rewritten as (for example):
IF (TG_OP = 'INSERT') THEN
statement
ELSIF (OLD.bar = ...) THEN
statement
END IF;
Regards,
--
Daniel
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Subject: Re: Evaluation of if conditions
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