Message-ID: <BAY105-F2918BEA4FBD95B8992E06BBBC90@phx.gbl>
In-Reply-To: <42E148E0.9080809@PresiNET.com>
From: "David Hofmann" <mor4321@hotmail.com>
To: BAnderson@PresiNET.com
Cc: pgsql-sql@postgresql.org
Subject: Re: Tigger
Date: Fri, 22 Jul 2005 15:56:33 -0400
Mime-Version: 1.0
Content-Type: text/plain; format=flowed

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 <BAnderson@PresiNET.com>
>To: David Hofmann <mor4321@hotmail.com>
>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 <BAnderson@PresiNET.com>
> >> To: David Hofmann <mor4321@hotmail.com>
> >> 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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