MySQL 存储过程相互调用举例

create procedure prccharges(in orderno char(6),out shippingCharges float(4,2),out wrapCharges float(4,2))
begin
select mshippingcharges into shippingCharges from orders where corderno = orderno;
select mgiftwrapcharges into wrapcharges from orders where corderno = orderno;
end;
create procedure prcHandLingCharges(in orderno char(6),out handlingCharges float(4,2))
begin
declare ppp float(4,2);
declare qqq float(4,2);
call prccharges(no,p,q);
set handlingCharges = p+ q;
end;

call prcHandLingCharges('1',@af);
select @af;