Re: event_trigger, 'DROP SCHEMA'

ty tom, works now

kvpg2=# cREATE or replace FUNCTION trigger_after_drop_schema() RETURNS
event_trigger
LANGUAGE plpgsql AS $$
DECLARE
r RECORD;
BEGIN
FOR r IN SELECT * FROM pg_event_trigger_dropped_objects()
LOOP
IF r.object_type = 'schema' THEN
execute format ('drop role IF EXISTS r_%I', r.object_name);
end if;
END LOOP;
END;
$$;
CREATE FUNCTION
kvpg2=# drop schema test;
DROP SCHEMA
kvpg2=# \du r_test
List of roles
Role name | Attributes
-----------+------------

br
Kaido

On Fri, 26 Jul 2024 at 20:44, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> kaido vaikla <kaido(dot)vaikla(at)gmail(dot)com> writes:
> > FOR r IN SELECT * FROM pg_event_trigger_dropped_objects()
> > LOOP
> > execute format ('drop role IF EXISTS r_%I', r.object_name);
> > END LOOP;
>
> > kvpg2=# drop schema test;
> > ERROR: null values cannot be formatted as an SQL identifier
> > CONTEXT: PL/pgSQL function trigger_after_drop_schema() line 7 at EXECUTE
>
> > Question, what i do wrong?
>
> Assume that every dropped object has a name, looks like.
> You would probably do well to check object_type before
> trying to drop the role.
>
> regards, tom lane
>