CREATE FUNCTION _api.comment_update() RETURNS TRIGGER LANGUAGE plpgsql VOLATILE AS $BODY$ DECLARE _user_id INTEGER; _changed BOOLEAN; BEGIN _user_id = _api.get_user_id(); _changed = FALSE; IF OLD.user_id <> _user_id THEN PERFORM _api.raise_deny(); END IF; NEW.content = COALESCE(NEW.content, OLD.content); NEW.content := _api.trim(NEW.content); PERFORM _api.validate_text( _text => NEW.content, _column => 'content', _min => 1, _max => 1024 ); IF NEW.content IS DISTINCT FROM OLD.content THEN _changed = TRUE; END IF; IF _changed THEN UPDATE admin.comment SET content = NEW.content WHERE id = OLD.id; END IF; RETURN NEW; END $BODY$; GRANT EXECUTE ON FUNCTION _api.comment_update() TO rest_user; GRANT UPDATE ON TABLE api.comment TO rest_user; GRANT UPDATE ON TABLE admin.comment TO rest_user; CREATE TRIGGER api_comment_update_trgr INSTEAD OF UPDATE ON api.comment FOR EACH ROW EXECUTE PROCEDURE _api.comment_update();