I have a members table and an items table. Every time items.member_id or items.active gets changed, members.items_submitted and members.items_approved gets updated by a trigger on items. I added an "admin" column to members, and now this happens: => update items set active = false where member_id=38; ERROR: null value in column "admin" violates not-null constraint CONTEXT: SQL statement "update members set items_approved=items_approved-1 where id= $1 " PL/pgSQL function "update_member_item_counts" line 54 at SQL statement The relevant part of the (after) trigger function on items is: ELSIF OLD.active is true and NEW.active is false then update members set items_approved=items_approved-1 where id=NEW.member_id; END IF; Is it necessary to drop and recreate triggers and/or corresponding functions after changing a table's schema? I don't know how something is trying to set members.admin to null (table members has no triggers). thanks csn Postgresql 8.0.x __________________________________ Yahoo! FareChase: Search multiple travel sites in one click. http://farechase.yahoo.com