.\\" auto-generated by docbook2man-spec $Revision: 1.25 $
.TH "CREATE USER" "l" "2002-01-30" "SQL - Language Statements" "SQL Commands"
.SH NAME
CREATE USER \- define a new database user account
.SH SYNOPSIS
.sp
.nf
CREATE USER \fIusername\fR [ [ WITH ] \fIoption\fR [ ... ] ]

where \fIoption\fR can be:
    
	  SYSID \fIuid\fR 
        | [ ENCRYPTED | UNENCRYPTED ] PASSWORD '\fIpassword\fR'
        | CREATEDB | NOCREATEDB
        | CREATEUSER | NOCREATEUSER
        | IN GROUP \fIgroupname\fR [, ...]
        | VALID UNTIL '\fIabstime\fR' 
  
.sp
.fi
.SS "INPUTS"
.PP
.TP
\fB\fIusername\fB\fR
The name of the user.
.TP
\fB\fIuid\fB\fR
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.
.TP
\fB\fIpassword\fB\fR
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 [\fBalter_user\fR(l)].
.TP
\fBENCRYPTED\fR
.TP
\fBUNENCRYPTED\fR
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
\fIAdministrator's Guide\fR for details on
how to set up authentication mechanisms. Note that older clients
may lack support for the MD5 authentication mechanism that's needed
to work with passwords that are stored encrypted.
.TP
\fBCREATEDB\fR
.TP
\fBNOCREATEDB\fR
These clauses define a user's ability to create databases.
If CREATEDB is specified, 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.
.TP
\fBCREATEUSER\fR
.TP
\fBNOCREATEUSER\fR
These clauses determine whether a user will be permitted to
create new users himself. 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 be NOCREATEUSER.
.TP
\fB\fIgroupname\fB\fR
A name of a group into which to insert the user as a new member.
Multiple group names may be listed.
.TP
\fB\fIabstime\fB\fR
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.
.PP
.SS "OUTPUTS"
.PP
.TP
\fBCREATE USER\fR
Message returned if the command completes successfully.
.PP
.SH "DESCRIPTION"
.PP
\fBCREATE USER\fR 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.
.PP
Use ALTER USER [\fBalter_user\fR(l)]
to change a user's password and privileges, and DROP USER [\fBdrop_user\fR(l)] to remove a user.
Use ALTER GROUP [\fBalter_group\fR(l)]
to add or remove the user from other groups.
PostgreSQL
comes with a script createuser [\fBcreateuser\fR(1)]
which has the same functionality as this command (in fact, it calls this command)
but can be run from the command shell.
.SH "USAGE"
.PP
Create a user with no password:
.sp
.nf
CREATE USER jonathan
.sp
.fi
.PP
Create a user with a password:
.sp
.nf
CREATE USER davide WITH PASSWORD 'jw8s0F4';
.sp
.fi
.PP
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:
.sp
.nf
CREATE USER miriam WITH PASSWORD 'jw8s0F4' VALID UNTIL 'Jan 1 2002';
.sp
.fi
.PP
Create an account where the user can create databases:
.sp
.nf
CREATE USER manuel WITH PASSWORD 'jw8s0F4' CREATEDB;
.sp
.fi
.SH "COMPATIBILITY"
.SS "SQL92"
.PP
There is no \fBCREATE USER\fR statement in SQL92.
