CREATE ROLE <ユーザー名>;
DROP ROLE <ユーザー名>;
\du
--- 以下出力例 ---
List of roles
Role name | Attributes | Member of
------------+------------------------------------------------------------+-----------
postgres | Superuser, Create role, Create DB, Replication, Bypass RLS | {}
または、
SELECT * FROM pg_roles;
--- 以下出力例 ---
rolname | rolsuper | rolinherit | rolcreaterole | rolcreatedb | rolcanlogin | rolreplication | rolconnlimit | rolpassword | rolvaliduntil | rolbypassrls | rolconfig | oid
---------------------------+----------+------------+---------------+-------------+-------------+----------------+--------------+-------------+---------------+--------------+-----------+-------
postgres | t | t | t | t | t | t | -1 | ******** | | t | | 10
pg_database_owner | f | t | f | f | f | f | -1 | ******** | | f | | 6171
pg_read_all_data | f | t | f | f | f | f | -1 | ******** | | f | | 6181
pg_write_all_data | f | t | f | f | f | f | -1 | ******** | | f | | 6182
pg_monitor | f | t | f | f | f | f | -1 | ******** | | f | | 3373
pg_read_all_settings | f | t | f | f | f | f | -1 | ******** | | f | | 3374
~(以下省略)~