Re: BUG #16258: exec_simple_query does not call ProcessCompletedNotifiesafter CommitTransactionCommand

That does seem like a legitimate gripe.

create or replace procedure foo() LANGUAGE plpgsql as $$
  begin 

  FOR i IN 1..100 LOOP
    perform pg_notify('channel','HI');
    perform pg_sleep(1); 

    commit;
  end loop;
end; $$;

CALL foo();

An actively polling listener gets all notification all at once at the end.  (I just use psql with a "LISTEN channel;" and the repeatedly execute ";" to get it to poll)

 Cheers,

Jeff