ALTER GROUP — change role name or membership
ALTER GROUProle_specification
ADD USERuser_name
[, ... ] ALTER GROUProle_specification
DROP USERuser_name
[, ... ] whererole_specification
can be:role_name
| CURRENT_ROLE | CURRENT_USER | SESSION_USER ALTER GROUPgroup_name
RENAME TOnew_name
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is an obsolete command, though still accepted for backwards compatibility, because groups (and users too) have been superseded by the more general concept of roles.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.
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.
Add users to a group:
ALTER GROUP staff ADD USER karl, john;
Remove a user from a group:
ALTER GROUP workers DROP USER beth;
There is no ALTER GROUP statement in the SQL standard.