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'\" t
.\" Title: ALTER GROUP
.\" Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\" Date: 2024
.\" Manual: PostgreSQL 16.2 Documentation
.\" Source: PostgreSQL 16.2
.\" Language: English
.\"
.TH "ALTER GROUP" "7" "2024" "PostgreSQL 16.2" "PostgreSQL 16.2 Documentation"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
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.el .ds Aq '
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.nh
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.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
ALTER_GROUP \- change role name or membership
.SH "SYNOPSIS"
.sp
.nf
ALTER GROUP \fIrole_specification\fR ADD USER \fIuser_name\fR [, \&.\&.\&. ]
ALTER GROUP \fIrole_specification\fR DROP USER \fIuser_name\fR [, \&.\&.\&. ]
where \fIrole_specification\fR can be:
\fIrole_name\fR
| CURRENT_ROLE
| CURRENT_USER
| SESSION_USER
ALTER GROUP \fIgroup_name\fR RENAME TO \fInew_name\fR
.fi
.SH "DESCRIPTION"
.PP
\fBALTER GROUP\fR
changes the attributes of a user group\&. This is an obsolete command, though still accepted for backwards compatibility, because groups (and users too) have been superseded by the more general concept of roles\&.
.PP
The first two variants add users to a group or remove them from a group\&. (Any role can play the part of either a
\(lquser\(rq
or a
\(lqgroup\(rq
for this purpose\&.) These variants are effectively equivalent to granting or revoking membership in the role named as the
\(lqgroup\(rq; so the preferred way to do this is to use
\fBGRANT\fR
or
\fBREVOKE\fR\&. Note that
\fBGRANT\fR
and
\fBREVOKE\fR
have additional options which are not available with this command, such as the ability to grant and revoke
ADMIN OPTION, and the ability to specify the grantor\&.
.PP
The third variant changes the name of the group\&. This is exactly equivalent to renaming the role with
\fBALTER ROLE\fR\&.
.SH "PARAMETERS"
.PP
\fIgroup_name\fR
.RS 4
The name of the group (role) to modify\&.
.RE
.PP
\fIuser_name\fR
.RS 4
Users (roles) that are to be added to or removed from the group\&. The users must already exist;
\fBALTER GROUP\fR
does not create or drop users\&.
.RE
.PP
\fInew_name\fR
.RS 4
The new name of the group\&.
.RE
.SH "EXAMPLES"
.PP
Add users to a group:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER GROUP staff ADD USER karl, john;
.fi
.if n \{\
.RE
.\}
.sp
Remove a user from a group:
.sp
.if n \{\
.RS 4
.\}
.nf
ALTER GROUP workers DROP USER beth;
.fi
.if n \{\
.RE
.\}
.SH "COMPATIBILITY"
.PP
There is no
\fBALTER GROUP\fR
statement in the SQL standard\&.
.SH "SEE ALSO"
\fBGRANT\fR(7), \fBREVOKE\fR(7), ALTER ROLE (\fBALTER_ROLE\fR(7))
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