CREATE USER(7) SQL Commands CREATE USER(7)
CREATE USER - define a new database user account
CREATE USER username [ [ WITH ] option [ ... ] ]
where option can be:
| [ ENCRYPTED | UNENCRYPTED ] PASSWORD 'password'
| CREATEDB | NOCREATEDB
| CREATEUSER | NOCREATEUSER
| IN GROUP groupname [, ...]
| VALID UNTIL 'abstime'
CREATE USER will add a new user to an instance of PostgreSQL. Refer to the Administrator's
Guide for information about managing users and authentication. You must be a database
superuser to use this command.
The name of the user.
uid The SYSID clause can be used to choose the PostgreSQL user ID of the user that is
being created. It is not at all necessary that those match the Unix user IDs, but
some people choose to keep the numbers the same.
If this is not specified, the highest assigned user ID plus one (with a minimum of
100) will be used as default.
Sets the user's password. If you do not plan to use password authentication you can
omit this option, but the user won't be able to connect to a password-authenticated
server. The password can be set or changed later, using ALTER USER
These keywords control whether the password is stored encrypted in pg_shadow. (If
neither is specified, the default behavior is determined by the PASSWORD_ENCRYPTION
server parameter.) If the presented string is already in MD5-encrypted format, then
it is stored as-is, regardless of whether ENCRYPTED or UNENCRYPTED is specified.
This allows reloading of encrypted passwords during dump/restore.
See the chapter on client authentication in the Administrator's Guide for details
on how to set up authentication mechanisms. Note that older clients may lack sup-
port for the MD5 authentication mechanism that is needed to work with passwords
that are stored encrypted.
These clauses define a user's ability to create databases. If CREATEDB is speci-
fied, the user being defined will be allowed to create his own databases. Using
NOCREATEDB will deny a user the ability to create databases. If this clause is
omitted, NOCREATEDB is used by default.
These clauses determine whether a user will be permitted to create new users him-
self. This option will also make the user a superuser who can override all access
restrictions. Omitting this clause will set the user's value of this attribute to
A name of a group into which to insert the user as a new member. Multiple group
names may be listed.
The VALID UNTIL clause sets an absolute time after which the user's password is no
longer valid. If this clause is omitted the login will be valid for all time.
Message returned if the command completes successfully.
Use ALTER USER [alter_user(7)] to change the attributes of a user, and DROP USER
[drop_user(7)] to remove a user. Use ALTER GROUP [alter_group(l)] to add the user to
groups or remove the user from groups. PostgreSQL includes a program createuser [crea-
teuser(1)] that has the same functionality as this command (in fact, it calls this com-
mand) but can be run from the command shell.
Create a user with no password:
CREATE USER jonathan;
Create a user with a password:
CREATE USER davide WITH PASSWORD 'jw8s0F4';
Create a user with a password, whose account is valid until the end of 2001. Note that
after one second has ticked in 2002, the account is not valid:
CREATE USER miriam WITH PASSWORD 'jw8s0F4' VALID UNTIL 'Jan 1 2002';
Create an account where the user can create databases:
CREATE USER manuel WITH PASSWORD 'jw8s0F4' CREATEDB;
The CREATE USER statement is a PostgreSQL extension. The SQL standard leaves the defini-
tion of users to the implementation.
ALTER USER [alter_user(7)], DROP USER [drop_user(l)], createuser(1)
SQL - Language Statements 2002-11-22 CREATE USER(7)