mysql裡面不可以返回游標,很讓人蛋疼,沒oracle好,而且,mysql沒有什麼好的除錯工具,也比較糾結.
下面是我寫的乙個mysql儲存過程,裡面使用到了游標,臨時表,最終返回的是結果接,希望對大家有幫助:
delimiter $$
use `realwar`$$
drop procedure if exists `queryremainspoints`$$
create definer=`root`@`%` procedure `queryremainspoints`(
/*in startsize int,
in pagesize int,startsize,分頁的起始位置,pagesize 分頁的大小,
in queryusername varchar(100),/*queryusername根據使用者名字來查詢,
in remainp int,
in remainp1 int,/*remainp 使用者剩餘軍餉小,remainp1剩餘軍餉大
in sump int,
in sump1 int, payp 使用者充值總額小,payp 總金額大
in rats int ,
in rats1 int滯留率查詢*/
begin
declare usernames varchar(50);
declare nickname varchar(50);
declare sumpoints int;
declare remainpoint int;
declare daypay int default 0;
declare daycost int;
declare sumcost int;
declare dayremainrats varchar(50);
declare sumremainrats varchar(50);
declare over int default 0;
/*定義乙個游標,獲得所有的使用者*/
/*if(queryusername is not null)else{
declare usernamecur cursor for select rp.username as username from realwar_tool.play_money_pay_log rp group by (rp.username);
declare continue handler for sqlstate '02000'set username = null;*/
declare usernamecur cursor for select rp.username from realwar_tool.play_money_pay_log rp group by (rp.username);
declare continue handler for sqlstate '02000'set usernames = null;
/*建立乙個臨時表,用來存放資料*/
drop table if exists realwar.temp_remainspoints;
create temporary table realwar.temp_remainspoints(
sid int(10) primary key auto_increment,
username1 varchar(100),
nickname1 varchar(100),
sumpoints1 int(10),
remainpoints1 int(10),
daypay1 int(10),
daycost1 int(10),
dayremainrats1 varchar(10),
sumremainrats1 varchar(10)
open usernamecur;/*開啟游標*/
/*usernamecur:loop */
fetch usernamecur into usernames;/*迴圈游標,給username賦值*/
while(usernames is not null) do
/*玩家暱稱*/
select (rp.nickname) into nickname from realwar.playbaseinfo rp where rp.username = usernames;
/*今日充值軍餉*/
select sum(r1.change_money)*10 into daypay from realwar_tool.play_money_pay_log r1 where r1.username=usernames and year(from_unixtime(r1.dateline)) = year(sysdate())
and month(from_unixtime(r1.dateline)) = month(sysdate()) and date(from_unixtime(r1.dateline)) = date(sysdate());
if(daypay is null) then
select 0 into daypay from dual;
end if;
/*使用者總充值軍餉或消費券*/
select sum(r1.change_money*10) into sumpoints from realwar_tool.play_money_pay_log r1 where r1.username = usernames;
if (sumpoints is null) then
select 0 into sumpoints from dual;
end if;
/*今日花費軍餉或消費券*/
select sum(t1.price) into daycost from realwar.t_consumption t1 where t1.username = usernames and year(str_to_date(t1.consumdate,'%y-%m-%d %h:%i:%s')) = year(sysdate())
and month(str_to_date(t1.consumdate,'%y-%m-%d %h:%i:%s')) = month(sysdate()) and date(str_to_date(t1.consumdate,'%y-%m-%d %h:%i:%s')) = date(sysdate());
if (daycost is null) then
select 0 into daycost from dual;
end if;
/*使用者總花費軍餉或消費券*/
select sum(t2.price) into sumcost from realwar.t_consumption t2 where t2.username = usernames;
if (sumcost is null) then
select 0 into sumcost from dual;
end if;
/*今日滯留*/
if(daypay!=0) then
select floor((daypay-daycost)/daypay*100) into dayremainrats from dual;
else
select 0 into dayremainrats from dual;
end if;
/*總滯留*/
if(sumpoints!=0)then
select floor((sumpoints-sumcost)/sumpoints*100) into sumremainrats from dual;
else
select 0 into sumremainrats from dual;
end if;
/*將得到的值,迴圈的插入到臨時表中*/
insert into temp_remainspoints set username1=usernames,nickname1= nickname,sumpoints1= sumpoints,
remainpoints1= (sumpoints-sumcost),daypay1 = daypay,daycost1= daycost,dayremainrats1 = dayremainrats,sumremainrats1= sumremainrats;
fetch usernamecur into usernames;/*迴圈游標,給username賦值*/
end while;
/*end loop;*/
close usernamecur;
/*返回的結果集*/
select username1,nickname1,sumpoints1,remainpoints1,daypay1,daycost1,dayremainrats1,sumremainrats1
from temp_remainspoints;
end$$
delimiter ;
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