Policy name and column name inside a policy function

Question

I have the following function associated with a policy in the employee table for SSN and SALARY columns
FUNCTION empid_policy_fn (object_schema IN VARCHAR2, object_name VARCHAR2)
end;
When the policy fires, the schema name and the name of the table are passed onto this function which we can use inside this function but is there a way to get the policy name and the column name which invokes this function?. The problem here is, I'm using same function (common) for multiple policies in different tables and that's why I need to get these details.
Thanks
-Krishnamurthy

Answer 1

Inside your policy function you can query V$VPD_POLICY along with V$SESSION, V$SQL and USER_SEC_RELEVANT_COLS
to get the fired policy name and column_names.
Something like
SELECT v.POLICY, .........
               FROM v$session ss, v$sql s, v$vpd_policy v
              WHERE ss.SID = (SELECT SID
                                FROM v$mystat
                               WHERE ROWNUM = 1)
                AND s.address = ss.sql_address
                AND s.address = v.paraddr
                AND s.hash_value = v.sql_hash
                AND s.child_number = 0HTH