如何在Oracle中使用游標來實現(xiàn)多重循環(huán)
2024-08-29 13:37:22
供稿：網(wǎng)友
這篇文章，是最近在寫一個項目中所用的存儲過程，由于是第一次接觸Oracle，其間花費了許多功夫，才把功能實現(xiàn)！特記錄下來，以供參考！
create or replace package PSH_GPrssTREAMSTAT is -- Author : ADMINISTRATOR
-- Created : 2004-12-8 10:56:01
-- Purpose : GPRS流量統(tǒng)計狀態(tài)
-- 統(tǒng)計GPRS流量type
C_Cur is ref cursor;
function Calcu_GPRSSTREAM return number;
end PSH_GPRSSTREAMSTAT;
-----------------------------------------------------------------------------
create or replace package body PSH_GPRSSTREAMSTAT is
function Calcu_GPRSSTREAM return number
is
c_ipPackHeadLen constant number := 40; -- 定義IP包頭長度
CURSOR c_SPINFO is
select distinct spid from sh_spinfo where isactive = '0';c_MDTINFO C_Cur ;
v_MDTINFO number;v_UpTransContentLens number(20,0); -- 存放當前GPRS終端上傳轉(zhuǎn)發(fā)的信息內(nèi)容長度
v_UpContentLens number(20,0);
v_UpTotalLens number(20,0); -- 累計GPRS終端上傳的信息內(nèi)容長度
v_DownContentLens number(20,0);
v_DownTotalLens number(20,0);
newID number(20,0);begin
-- 初始化
select max(statid) into newID from sh_gprsstreamstat;
if (newID is null) then
newID := 1;
end if;for v_SPINFO In c_SPINFO loop -- 首先獲取SPID
-- 其次遍歷出與當前SPID對應的所有MDT
open c_MDTINFo for select distinct mdtid from sh_mdtinfo where (isactive = '0') and (spid = v_SPINFO.spid);
loop
fetch c_MDTINFO into v_MDTINFO;
exit when c_MDTINFO%notfound;v_UpContentLens := 0;
v_UpTransContentLens := 0;
v_UpTotalLens := 0;
v_DownContentLens := 0;
v_DownTotalLens := 0;
-- 下面兩個select語句是用來獲得GPRS終端上傳的信息流量
select sum(length(content) + c_IPPackHeadLen) into v_UpContentLens from sh_gprsmdtupinfo where (MDTID = v_MDTINFO) and (spid = v_SPINFO.spid) ;
select sum(length(content) + c_IPPackHeadLen) into v_UpTransContentLens from sh_gprsmdttransinfo where (issUCcess = '1') and (MDTID = v_MDTINFO) and (spid = v_SPINFO.spid) ;
if (v_UpContentLens is null) then
v_UpContentLens := 0;
end if;
if (v_UpTransContentLens is null) then
v_UpTransContentLens := 0;
end if;
v_UpTotalLens := v_UpTotalLens + v_UpContentLens + v_UpTransContentLens;-- 下面的Select語句是用來獲得服務商下發(fā)的信息流量
select sum(length(content) + c_IPPackHeadLen) into v_DownContentLens from sh_gprsspdowninfo where (MDTID = v_MDTINFO) and (spid = v_SPINFO.spid) ;
if (v_DownContentLens is null) then
v_DownContentLens := 0;
end if;
v_DownTotalLens := v_DownTotalLens + v_DownContentLens ;-- 將統(tǒng)計出的累計值存放到流量狀態(tài)統(tǒng)計表中
if (v_UpTotalLens >0) or (v_DownTotalLens > 0) then
insert into sh_gprsstreamstat (statid,spid,mdtid,starttime,endtime,mdtupstream,spdownstream)
values(newID,v_SPINFO.spid,v_MDTINFO,sysdate,sysdate,v_UpTotalLens,v_DownTotalLens);
-- 自增量加1
newID := newID + 1;
end if;
end loop;
close c_MDTINFO;
commit;
end loop;
return 1;
end;
begin
null;
end PSH_GPRSSTREAMSTAT;
