"PostgreSQL Bugs List" <pgsql-bugs(at)postgresql(dot)org> writes:
> revoke create on schema do not issues an error when user has no access
> privileges to do that.
> dbmail=> REVOKE CREATE ON SCHEMA public FROM PUBLIC;
> REVOKE
> Grant works as expected
> dbmail=> GRANT USAGE on SCHEMA public to public;
> ERROR: permission denied for schema public
In 8.0 both of these cases will return WARNINGs (not errors). This is
per our current reading of the SQL specification.
regards, tom lane