Remote Procedure Execution

Question

Hi,
Is it possible to execute a procedure in other schema.
example: there is user A and user B.
user A has a DBlink with all necessary grants to user B.
Can user A execute a procedure which is present in user B schema?
How?

Answer 1

Hi GreenHorn,
Please find below examples:
CREATE OR REPLACE PROCEDURE USER_A.UPDATE_EMP
BEGIN
UPDATE USER_A.EMP
SET SALARY = SALARY + 1000;
COMMIT;
END;
GRANT EXECUTE ON USER_A.UPDATE_EMP TO USER_B;
Now, if User_B is executing the procedure, he can updates the table USER_A.EMP.
BEGIN
USER_A.UPDATE_EMP;
END;
PL/SQL Procedure Successfully Completed.
You should note one point here, The USER_B doesn't have any "UPDATE or INSERT or DELETE" privilege on TABLE EMP which exists in USER_A.
But, when I am executing this procedure from USER_A, it is executed successfully. This means, when you execute procedure, that procedure will be executed under the Privilege of OWNER.
So, in this example, If USER_B is executing USER_A's procedure, that procedure is being executed under privilege of USER_A only.
There is one more syntax called "AUTHID CURRENT_USER" to limit the privilege of PLSQL procedures. But, now, its not needed to confuse with that.
Thanks
Prabhu K