Обсуждение: Restrict CREATEROLE privilege grant to NOLOGIN only?

Is it possible to create a login user who themselves can CREATE ROLE NOLOGIN but not CREATE ROLE LOGIN? Here’s an
exampleof the behavior I’d like to achieve. 

$ psql
postgres=> CREATE USER admin WITH PASSWORD 'mypassword' CREATEROLE;
postgres=> — revoke something?
postgres=> \q

$ psql -U admin -W
postgres=> CREATE ROLE myrole;
CREATE ROLE
postgres=> CREATE USER myuser WITH PASSWORD '1234’;
ERROR:  permission denied to create role

Of course, as written the final “CREATE USER” statement succeeds in reality.

Thanks,
Alex