SQL & PL/SQL

I have a procedure that uses database link but I need to use it with database link and also without database link.

Could you help me improve pl/sql?

CREATE OR REPLACE PROCEDURE PRC_DBLINK

IS

v_oder NUMBER;

SELECT dh.order INTO v_order

FROM document@dbl_history dh

WHERE rownum <= 1

dbms_output.put_line('records: ' || v_order)

end PRC_DBLINK;

Thanks a lot.