1。构建策略函数：
CREATE OR REPLACE FUNCTION no_records (
p_schema IN VARCHAR2 DEFAULT NULL,
p_object IN VARCHAR2 DEFAULT NULL)
RETURN VARCHAR2
AS
BEGIN
RETURN '1=0';
END;
2。添加策略
BEGIN
DBMS_RLS.add_policy
(object_schema => 'SCOTT',
object_name => 'PEOPLE_RO',
policy_name => 'PEOPLE_RO_IUD',
function_schema => 'SEC_MGR',
policy_function => 'No_Records',
statement_types => 'INSERT,UPDATE,DELETE',
update_check => TRUE);
END;
3。测试：
sec_mgr@KNOX10G> scott@KNOX10g> -- User can read all records
scott@KNOX10g> SELECT COUNT (*) FROM people_ro;
COUNT(*)
----------
14
scott@KNOX10g> -- Cannot update any records
scott@KNOX10g> UPDATE people_ro
2 SET ename = NULL;
0 rows updated.
scott@KNOX10g> -- Cannot delete records
scott@KNOX10g> DELETE FROM people_ro;
0 rows deleted.
scott@KNOX10g> -- Cannot insert new records
scott@KNOX10g> INSERT INTO people_ro (ename) VALUES ('KNOX');
INSERT INTO people_ro (ename) VALUES ('KNOX')
*
ERROR at line 1:
ORA-28115: policy with check option violation
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