Re: [SQL] Adding a rule to update a last_changed field

I'm trying to use a rule to maintain a last_changed field. 
  CREATE RULE rule1 AS    ON UPDATE TO thetable    DO UPDATE thetable SET last_changed = now()    WHERE id = new.id;

Try instead something like
  CREATE RULE rule1 AS    ON UPDATE TO thetable    DO INSTEAD UPDATE thetable SETlast_changed = now(),field1 =
new.field1,field2= new.field2,...fieldn = new.fieldn    WHERE id = new.id;
 

That is, use an INSTEAD rule and replace each field explicitly.

Cheers,
Brook