Try: create or replace function update_last_edit() returns trigger as $$ begin new.last_edit=now(); return new; end; $$ language plpgsql;
On 11/22/05, Leif B. Kristensen <[EMAIL PROTECTED]> wrote: > On Tuesday 22 November 2005 17:25, Achilleus Mantzios wrote: > >O Leif B. Kristensen έγραψε στις Nov 22, 2005 : > >> I'm trying to understand triggers. I have read the documentation in > >> the manual as well as the few pages in the Douglas book about the > >> subject, but I don't see how to implement a trigger that simply > >> updates a 'last_edit' date field in my 'persons' table whenever I do > >> an insert or update into my 'participants' table; that is a trigger > >> that basically does an "UPDATE persons SET 'last_edit' = NOW() WHERE > >> persons.person_id = participants.person_fk". Is that even possible? > > > >smth like: > >foodb=# CREATE or REPLACE FUNCTION upd_dad() RETURNS "trigger" AS ' > >foodb'# BEGIN > >foodb'# UPDATE dad set lastedit=now() where id=new.dadid; > >foodb'# RETURN new; > >foodb'# END; > >foodb'# ' > >foodb-# LANGUAGE plpgsql; > >CREATE FUNCTION > >foodb=# CREATE TRIGGER upd_dad_tg AFTER INSERT OR UPDATE ON kid FOR > > EACH ROW EXECUTE PROCEDURE upd_dad(); > > leif=> create or replace function update_last_edit() returns trigger as > $$ > leif$> begin > leif$> update persons set last_edit=now() where person_id=new.person_fk; > leif$> return new; > leif$> end; > leif$> $$ language plpgsql; > CREATE FUNCTION > leif=> create trigger update_last_edit after insert or update on > participants > leif-> for each row execute procedure update_last_edit(); > CREATE TRIGGER > leif=> insert into participants (participant_id,person_fk) values (1,1); > ERROR: record "new" has no field "last_edit" > CONTEXT: PL/pgSQL function "process_last_edited" line 2 at assignment > leif=> > > What am I missing? > -- > Leif Biberg Kristensen | Registered Linux User #338009 > http://solumslekt.org/ | Cruising with Gentoo/KDE > > ---------------------------(end of broadcast)--------------------------- > TIP 2: Don't 'kill -9' the postmaster > ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
