立即执行跟着的方法，并把当前的变量用USING 传进去。
EXECUTE IMMEDIATE
'BEGIN
Work_Order_Req_Line_Util_API.Create_Po_Allowed(:requisition_, :line_no_, :release_no_);
END;'
USING requisition_no_, line_no_, release_no_;
---------------------------------------------------------------------------------------------------
stmt_ := 'BEGIN
Customer_Order_Pur_Order_API.Modify_From_Purchase (:requisition_no,
:line_no,
:release_no,
:order_no,
:assg_line_no,
:assg_release_no);
END;';
-- ifs_assert_safe JaJalk 20060125
EXECUTE IMMEDIATE stmt_
USING IN requisition_no_,
IN line_no_,
IN release_no_,
IN order_no_,
IN assg_line_no_,
IN assg_release_no_;
---------------------------------------------------------------------------------------------------------
EXECUTE IMMEDIATE
'BEGIN
:activity_seq := active_separate_api.get_activity_seq(:wo_no);
:activity_state := Activity_API.Get_State(:activity_seq);
:activity_no := Activity_API.Get_Activity_No(:activity_seq);
END;'
USING
IN OUT activity_seq_,
IN wo_no_,
OUT activity_state_,
OUT activity_no_;