NAME

       ALTER_GROUP - change role name or membership

SYNOPSIS

       ALTER GROUP role_specification ADD USER user_name [, ... ]
       ALTER GROUP role_specification DROP USER user_name [, ... ]

       where role_specification can be:

           role_name
         | CURRENT_ROLE
         | CURRENT_USER
         | SESSION_USER

       ALTER GROUP group_name RENAME TO new_name

DESCRIPTION

       ALTER GROUP 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       for backwards compatibility, because groups (and users too) have been superseded by the more general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.

       The first two variants add users to a group or remove them from a group. (Any role can play the part of
       either a “user” or a “group” for this purpose.) These variants are effectively equivalent to granting or
       revoking membership in the role named as the “group”; so the preferred way to do this is to use GRANT or
       REVOKE. Note that GRANT and REVOKE 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.

       The third variant changes the name of the group. This is exactly equivalent to renaming the role with
       ALTER ROLE.

PARAMETERS

       group_name
           The name of the group (role) to modify.

       user_name
           Users (roles) that are to be added to or removed from the group. The users must already exist; ALTER
           GROUP does not create or drop users.

       new_name
           The new name of the group.

EXAMPLES

       Add users to a group:

           ALTER GROUP staff ADD USER karl, john;

       Remove a user from a group:

           ALTER GROUP workers DROP USER beth;

COMPATIBILITY

       There is no ALTER GROUP statement in the SQL standard.

SEE ALSO

       GRANT(7), REVOKE(7), ALTER ROLE (ALTER_ROLE(7))