Re: trigger on table

TryCREATE FUNCTION set_item_last_updated () RETURNS OPAQUE AS 'BEGINNEW.last_updated = now();RETURN NEW;END;'LANGUAGE
'plpgsql';
CREATE TRIGGER item_last_updated BEFORE UPDATE ON itemFOR EACH ROW EXECUTE PROCEDURE set_item_last_updated();

Make sure its BEFORE...

Hope this helps


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----- Original Message -----
From: "Graham Vickrage" <graham@digitalplanit.com>
To: "Postgres SQL" <pgsql-sql@postgresql.org>
Sent: Thursday, February 14, 2002 2:17 PM
Subject: [SQL] trigger on table


> I am trying to create a trigger on a table that simply sets the
last_updated
> field when any updates are made to that table.
>
> I have tried the following: -
>
> CREATE FUNCTION set_item_last_updated () RETURNS OPAQUE AS '
> BEGIN
> UPDATE item SET last_updated = now();
> RETURN OLD;
> END;' LANGUAGE 'plpgsql';
>
> CREATE TRIGGER item_last_updated AFTER UPDATE ON item
> FOR EACH ROW EXECUTE PROCEDURE set_item_last_updated();
>
> When I try to execute this it hangs and postmaster eventually runs out of
> memory.
>
> Is there a way to do it just using sql not plpsql?
> Why is it hanging?
>
> Thank in advance.
>
> Graham
>
>
>
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