Each result set returned by a non-Oracle system stored procedure is mapped by an Oracle driver to an OUT argument of type REF CURSOR. The client program detects a stored procedure with several OUT arguments of type REF CURSOR. After executing the stored procedure, the client program can fetch from the REF CURSOR the same way as it would from a REF CURSOR returned by an Oracle stored procedure. When connecting to the gateway as described in Section 3.4.1.1, Heterogeneous Services will be in cursor mode.