ALTER GROUP
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_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 This is an obsolete command, but it is still accepted for backward compatibility, since groups (and users) have been replaced by the more general concept of roles. The first two variants add users to a group or remove users from a group (for this purpose, any role can play the role of a "user" or "group"). These variants are effectively equivalent to granting or revoking membership in the role referred to as the "group", so the preferred method is to use GRANT or REVOKE. 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
The users (roles) to be added to or removed from the group. These 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;