CREATE USER name [ [ WITH ] option [ ... ] ]
这里 option 可以是：
SUPERUSER | NOSUPERUSER
| CREATEDB | NOCREATEDB
| CREATEROLE | NOCREATEROLE
| CREATEUSER | NOCREATEUSER
| INHERIT | NOINHERIT
| LOGIN | NOLOGIN
| CONNECTION LIMIT connlimit
| [ ENCRYPTED | UNENCRYPTED ] PASSWORD 'password'
| VALID UNTIL 'timestamp'
| IN ROLE rolename [, ...]
| IN GROUP rolename [, ...]
| ROLE rolename [, ...]
| ADMIN rolename [, ...]
| USER rolename [, ...]
| SYSID uid
CREATE USER 现在是 CREATE ROLE 的别名，参阅后者以获取更多信息。唯一的区别是 CREATE USER 命令缺省假设有 LOGIN ，而 CREATE ROLE 缺省是 NOLOGIN 。