create user的語法

CREATE USER name [ [ WITH ] option [ ... ] ]where option can be:SUPERUSER | NOSUPERUSER| CREATEDB | NOCREATEDB| CREATEROLE | NOCREATEROLE| CREATEUSER | NOCREATEUSER| INHERIT | NOINHERIT| LOGIN | NOLOGIN| REPLICATION | NOREPLICATION| BYPASSRLS | NOBYPASSRLS| CONNECTION LIMIT connlimit| [ ENCRYPTED | UNENCRYPTED ] PASSWORD 'password'| VALID UNTIL 'timestamp'| IN ROLE role_name [, ...]| IN GROUP role_name [, ...]| ROLE role_name [, ...]| ADMIN role_name [, ...]| USER role_name [, ...]| SYSID uid

例如：create user test with replication createrole createdb login password 'test123';

with 后面的部分描述的是“系統權限”或者數據庫用戶的屬性。使用\du命令查看，則對應著List of roles Attributes列。如圖：

create user與create role的區別

官網上的描述是：

CREATE USER?is now an alias for?CREATE ROLE. The only difference is that when the command is spelled?CREATE USER,?LOGIN?is assumed by default, whereas?NOLOGIN?is assumed when the command is spelled?CREATE ROLE.

也就是說create user 默認有login權限，而create role沒有。

?

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