Re: maintaining a field for every UPDATION.

On Fri, 4 Jan 2002, Bhuvan A wrote:

> Well, now i would like to maintain modify_time for every updation. how
> can i? Using common plpgsql function i cant even able to refer OID
> even during UPDATION. The result is
>
> ERROR: record old has no field oid
> or
> ERROR: record new has no field oid
>
> One way: i can have seperate plpgsql function for every table and
> apply conditions accordingly. But i dont think thats the consistent
> way.
>
> how else can i maintain modify_time field ?

Would a before update trigger function something like:

begin
NEW.modify_time=now();
return NEW;
end;

do what you want?