ALTER ROLE

Purpose

Use the ALTER ROLE statement to change the authorization needed to enable a role.

See Also: CREATE ROLE for information on creating a role SET ROLE for information on enabling or disabling a role for your session

Prerequisites

You must either have been granted the role with the ADMIN OPTION or have ALTER ANY ROLE system privilege.

Before you alter a role to IDENTIFIED GLOBALLY, you must:

• Revoke all grants of roles identified externally to the role and
• Revoke the grant of the role from all users, roles, and PUBLIC.

The one exception to this rule is that you should not revoke the role from the user who is currently altering the role.

Syntax

alter_role::=

Text description of alter_role

Keywords and Parameters

The keywords and parameters in the ALTER ROLE statement all have the same meaning as in the CREATE ROLE statement.

Notes: When you alter a role, user sessions in which the role is already enabled are not affected. If you change a role identified by password to an application role (with the USING package clause), password information associated with the role is lost. Oracle will use the new authentication mechanism the next time the role is to be enabled. If you have the ALTER ANY ROLE system privilege and you change a role that is IDENTIFIED GLOBALLY to IDENTIFIED BY password, IDENTIFIED EXTERNALLY, or NOT IDENTIFIED, then Oracle grants you the altered role with the ADMIN OPTION, as it would have if you had created the role identified nonglobally.

See Also: CREATE ROLE and the examples that follow

Examples

Changing Role Identification: Example

The following statement changes the role warehouse_user (created in "Creating a Role: Example") to NOT IDENTIFIED:

ALTER ROLE warehouse_user NOT IDENTIFIED;

Changing a Role Password: Example

This statement changes the password on the dw_manager role (created in "Creating a Role: Example") to data:

ALTER ROLE dw_manager 
   IDENTIFIED BY data; 

Users granted the dw_manager role must subsequently enter the new password "data" to enable the role.

Application Roles: Example

The following example changes the dw_manager role to an application role using the hr.admin package:

ALTER ROLE dw_manager IDENTIFIED USING hr.admin;