Oracle® Database SQL Reference 10g Release 2 (10.2) Part Number B14200-01 |
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Purpose
Use the SET
ROLE
statement to enable and disable roles for your current session.
When a user logs on, Oracle Database enables all privileges granted explicitly to the user and all privileges in the user's default roles. During the session, the user or an application can use the SET
ROLE
statement any number of times to change the roles currently enabled for the session.
You can see which roles are currently enabled by examining the SESSION_ROLES
data dictionary view.
See Also:
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Prerequisites
You must already have been granted the roles that you name in the SET
ROLE
statement.
Syntax
set_role::=
Semantics
role
Specify a role to be enabled for the current session. Any roles not listed and not already enabled are disabled for the current session.
In the
IDENTIFIED
BY
password
clause, specify the password for a role. If the role has a password, then you must specify the password to enable the role.
Restriction on Setting Roles You cannot specify a role unless it was granted to you either directly or through other roles. You cannot specify a role identified globally. Global roles are enabled by default at login, and cannot be reenabled later.
Specify
ALL
to enable all roles granted to you for the current session except those optionally listed in the EXCEPT
clause.
Roles listed in the EXCEPT
clause must be roles granted directly to you. They cannot be roles granted to you through other roles.
If you list a role in the EXCEPT
clause that has been granted to you both directly and through another role, then the role remains enabled by virtue of the role to which it has been granted.
Restriction on the ALL Clause You cannot use this clause to enable roles with passwords that have been granted directly to you.
Specify NONE
to disable all roles for the current session, including the DEFAULT
role.
Examples
Setting Roles: Examples To enable the role dw_manager
identified by the password warehouse
for your current session, issue the following statement:
SET ROLE dw_manager IDENTIFIED BY warehouse;
To enable all roles granted to you for the current session, issue the following statement:
SET ROLE ALL;
To enable all roles granted to you except dw_manager
, issue the following statement:
SET ROLE ALL EXCEPT dw_manager;
To disable all roles granted to you for the current session, issue the following statement:
SET ROLE NONE;