It didn't error out, however the function didn't work. Specificly the if
statement. I took out the if statement and it started updating, I put it
back in and it fails to update. Not sure why. I've confirmed that the
program not attempting to update the stamp_lastupdate field. Here what I
end up with that worked.
CREATE or REPLEACE FUNCTION session_update() RETURNS trigger AS '
BEGIN
-- Check date exists
NEW.stamp_lastupdate := ''now'';
RETURN NEW;
END;
' LANGUAGE plpgsql;
CREATE TRIGGER session_update BEFORE INSERT OR UPDATE ON sessions FOR EACH
ROW EXECUTE PROCEDURE session_update();
I appercated the help Bricklen.
David
From: Bricklen Anderson <[EMAIL PROTECTED]>
To: David Hofmann <[EMAIL PROTECTED]>
CC: pgsql-sql@postgresql.org
Subject: Re: [SQL] Tigger
Date: Fri, 22 Jul 2005 12:28:32 -0700
David Hofmann wrote:
> I'm using 7.3.
>
>> From: Bricklen Anderson <[EMAIL PROTECTED]>
>> To: David Hofmann <[EMAIL PROTECTED]>
>> CC: pgsql-sql@postgresql.org
>> Subject: Re: [SQL] Tigger
>> Date: Fri, 22 Jul 2005 12:17:41 -0700
>>
>> David Hofmann wrote:
>> > I've look throught the docs and from what I can see the bellow code
>> > should work, however I keep getting the error:
>> >
>> > ERROR: parser: parse error at or near "$" at character 53
>> >
>> > CREATE FUNCTION session_update() RETURNS trigger AS $session_update$
>> > BEGIN
>> > -- Check date exists
>> > IF NEW.stamp_lastupdate IS NULL THEN
>> > NEW.stamp_lastupdate := 'now';
>> > END IF;
>> > RETURN NEW;
>> > END;
>> >
>> > $session_update$ LANGUAGE plpgsql;
>> >
>> > CREATE TRIGGER session_update BEFORE INSERT OR UPDATE ON sessions FOR
>> > EACH ROW EXECUTE PROCEDURE session_update();
>> >
>> >
>> > Any help or suggestions of websites I should read would be
appercated.
>> >
>> > David
>>
>> Which version of postgresql are you using? I don't believe that the
>> "$" quoting
>> was available in older versions than 8 (or late 7?).
I don't think that it worked then. Simple test:
CREATE FUNCTION session_update() RETURNS trigger AS '
BEGIN
-- Check date exists
IF NEW.stamp_lastupdate IS NULL THEN
NEW.stamp_lastupdate := ''now'';
END IF;
RETURN NEW;
END;
' LANGUAGE plpgsql;
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