This
form of the REVOKE statement revokes the privileges on a schema.
Invocation
This statement can be embedded
in an application program or issued through the use of dynamic SQL
statements. It is an executable statement that can be dynamically
prepared only if DYNAMICRULES run behavior is in effect for the package
(SQLSTATE 42509).
Authorization
The privileges
held by the authorization ID of the statement must include ACCESSCTRL
or SECADM authority.
Syntax
.-,------------.
V |
>>-REVOKE----+-ALTERIN--+-+--ON SCHEMA--schema-name------------->
+-CREATEIN-+
'-DROPIN---'
.-,---------------------------------.
V | .-BY ALL-.
>--FROM----+-+-------+--authorization-name-+-+--+--------+-----><
| +-USER--+ |
| +-GROUP-+ |
| '-ROLE--' |
'-PUBLIC------------------------'
Description
- ALTERIN
- Revokes the privilege to alter or comment on objects in the schema.
- CREATEIN
- Revokes the privilege to create objects in the schema.
- DROPIN
- Revokes the privilege to drop objects in the schema.
- ON SCHEMA schema-name
- Specifies the name of the schema on which privileges are to be
revoked.
- FROM
- Indicates from whom the privileges are revoked.
- USER
- Specifies that the authorization-name identifies
a user.
- GROUP
- Specifies that the authorization-name identifies
a group name.
- ROLE
- Specifies that the authorization-name identifies
a role name.
- authorization-name,...
- Lists the authorization IDs of one or more users, groups, or
roles.
The list of authorization IDs cannot include the authorization
ID of the user issuing the statement (SQLSTATE 42502).
- PUBLIC
- Revokes the privileges from PUBLIC.
- BY ALL
- Revokes each named privilege from all named users who were explicitly
granted those privileges, regardless of who granted them. This is
the default behavior.
Rules
- For each authorization-name specified, if neither
USER, GROUP, nor ROLE is specified, then:
- For all rows for the specified object in the SYSCAT.SCHEMAAUTH
catalog view where the grantee is authorization-name:
- If all rows have a GRANTEETYPE of 'U', USER is assumed.
- If all rows have a GRANTEETYPE of 'G', GROUP is assumed.
- If all rows have a GRANTEETYPE of 'R', ROLE is assumed.
- If all rows do not have the same value for GRANTEETYPE, an error
is returned (SQLSTATE 56092).
Notes
- Revoking a specific privilege does not necessarily revoke the
ability to perform the action. A user can proceed with a task if other
privileges are held by PUBLIC, a group, or a role, or if
the user holds a higher level authority such as DBADM.
Examples
- Example 1: Given that USER4 is only a user and not a group,
revoke the privilege to create objects in schema DEPTIDX from the
user USER4.
REVOKE CREATEIN ON SCHEMA DEPTIDX FROM USER4
- Example 2: Revoke the privilege to drop objects in schema
LUNCH from the user CHEF and the group WAITERS.
REVOKE DROPIN ON SCHEMA LUNCH
FROM USER CHEF, GROUP WAITERS