请教SQL关于游标的问题

Question

存储过程有个参数，根据这个参数来分别写的游标查询语句，但是处理这个游标是同一个代码，好像不能同时定义两次，我又不想把后续的处理代码写两次，有什么办法吗？

declare @tempid int,@lasttime datetime,@sql nvarchar(1000)
set @tempid=0;
BEGIN
    SET NOCOUNT ON;
if @para1='oneself'
    begin
        declare bzrid cursor for select id from erpzjbzrlist as a        
    end
else if @para1='all'
    begin
        declare bzrid cursor for select id from erpzjbzrlist as a where (select max(endtime) from erpzjphasetime where bianhao=a.id  group by bianhao) >=getdate();    
    end
else 
    begin
       return -1
    end
    open bzrid
    fetch next from bzrid  into @tempid
    while (@@fetch_status=0)
    begin
        select @lasttime =max(endtime) from erpzjphasetime where bianhao=(select id from erpzjbzrlist as a where (select max(endtime) from erpzjphasetime where bianhao=a.id  group by bianhao) >=getdate() and id<@tempid) group by bianhao
    if(@lasttime<>null)
    begin
        select @lasttime=dateadd(day,1,@lasttime);
        exec ERP_p_adjustProjectTime @tempid,@lasttime;
    end
    fetch next from bzrid  into @tempid
    end