From: Phillip Smith <phillip.smith@weatherbeeta.com.au>
To: pgsql-sql@postgresql.org
Subject: Re: Proposed archival read only trigger on rows - prevent history modification
Date: Fri, 22 Feb 2008 15:09:11 +1100
Message-ID: <014801c87508$ada837d0$9b0014ac@wbaus090> (raw)
In-Reply-To: <200802212231.58019.xzilla@users.sourceforge.net>
On Tuesday 12 February 2008 03:25, Bryce Nesbitt wrote:
> Yes, the view approach has some advantages. But it still leaves the
> underlying tables naked to modification. And since the most likely
> error is... well... me (or another admin) at the SQL prompt, we want
> underlying tables protected also.
Couldn't you make a row trigger BEFORE UPDATE?
CREATE OR REPLACE FUNCTION readonly_handler()
RETURNS "trigger" AS
$BODY$
BEGIN
IF OLD.read_only = TRUE THEN
RETURN OLD;
ELSE
RETURN NEW;
END IF;
END;
$BODY$
LANGUAGE 'plpgsql' VOLATILE;
THINK BEFORE YOU PRINT - Save paper if you don't really need to print this
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To: pgsql-sql@postgresql.org
Cc: phillip.smith@weatherbeeta.com.au
Subject: Re: Proposed archival read only trigger on rows - prevent history modification
In-Reply-To: <014801c87508$ada837d0$9b0014ac@wbaus090>
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