mysql 存储过程实例 (日期以小时递增 while loop循环嵌套 随机数生成)

DELIMITER $$
drop procedure if exists proc_test$$
create procedure proc_test()
begin
declare id int;  --对象id
declare done int; --循环结束的标志
declare in_dateTime date; --循环递增的起始时间
declare tempVal int; --随机数

declare	cursor_test cursor for select cfldID from cfield; --建立游标，获取所有的cfield的id
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1; --设置循环结束的标志

open cursor_test; --打开游标
cursor_loop:loop
fetch cursor_test into id;
if done =1 then
leave cursor_loop;
end if;
--设置起始时间值
set in_dateTime = '2012-11-30 00:00:00';
set @in_dateTime = in_dateTime;
--while递增循环，每次增加一个小时
loop_while: while @in_dateTime < '2012-11-30 23:00:00' do
--生成随机数
SELECT FLOOR(18 + (RAND() * 7)) into tempVal;
set @tempVal = tempVal;
insert into cdacq(cfldID,HTime,MTime,LTime,FanState,FanPowerState,SupplyTemp,RoomTemp,AcqTime,Alt) values(id,10000,10000,10000,'84','0',42,@tempVal,@in_dateTime,'');

set @in_dateTime = date_add(@in_dateTime, interval '01:00:00' hour_second); --时间增加一小时
end while loop_while; --结束while循环

end loop cursor_loop;  --结束loop循环
close cursor_test; --关闭游标

end  $$ --存储过程结束
DELIMITER;