Carlos Mennens <carlos.mennens@gmail.com> writes:
> I've been reading the documentation and I'm trying to understand what
> 'GRANT' options make up a 'superuser' in PostgreSQL.
Superuser-ness is not a grantable privilege; it's an attribute of a
role. See CREATE/ALTER ROLE.
> Obviously 'Carlos' is a superuser but what does that exactly entail
> beyond CREATEDB & CREATEROLE?
A superuser succeeds at any privilege test whatsoever.
regards, tom lane