The following code will help you initialize the org context in oracle e-business R12 from the sql command line.

BEGIN

--<   Fnd_Global.apps_initialize (user_id, resp_id, resp_application_id, 0);>

   Fnd_Global.apps_initialize (1134, 20634, 401, 0);

--Mo_Global.init (product family');

   Mo_Global.init ('PO');

END;