MaRCeLO PeReiRA wrote: > Hi guys, > > Please, give me some advices on how to do the > following: > > I have the following table: > > CREATE TABLE products ( > id SERIAL, > description TEXT, > lastupdate date > ); > > Well, I would like to update the column "lastupdate" > with the value "now()" on every UPDATE executed on a > row of this table. > > Do I have to create a function to do it? Can you help > me? > > Regards, > > Marcelo <snip>
/* Your function */ CREATE FUNCTION set_lastchg() RETURNS opaque AS ' BEGIN NEW.lastupdate = now(); RETURN NEW; END; 'LANGUAGE 'plpgsql'; /* and the triggers that will use it, All my main tables have a lastupdate column and a trigger to execute set_lastchg() whenever the row is changed */ CREATE TRIGGER lastclubchg_trig BEFORE INSERT OR UPDATE ON club FOR EACH ROW EXECUTE PROCEDURE set_lastchg(); CREATE TRIGGER lastownerchg_trig BEFORE INSERT OR UPDATE ON owner FOR EACH ROW EXECUTE PROCEDURE set_lastchg(); -- 11:25am up 4 days, 1:32, 1 user, load average: 1.29, 1.38, 1.29 To email me, change .com to .ca Linux Counter Registration #126647 ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html