【转】mysql 存储过程的示例

原文地址：https://blog.csdn.net/lishaojun0115/article/details/50183661

begin
#定义变量
declare local_sender varchar(20);
declare local_receiver varchar(20);
declare local_status int;
#创建游标
declare local_message cursor for select patientid,doctorid from 
tb_purchaseservice_relation where state=1 and createtime<date_sub(now(),interval 2 day );
DECLARE CONTINUE HANDLER FOR NOT FOUND SET local_status=0;
set local_status=0;
#打开游标
open local_message;
set local_status=(select count(*) from tb_purchaseservice_relation where state=1 and createtime<date_sub(now(),interval 2 day ));
#while循环
while local_status>0 do
#给游标赋值
fetch local_message into local_sender,local_receiver;
if(local_status>0) then
 insert into tb_messagecenter(typeid,sender,receiver,content,isLooked,title,isDeal,dealResult) 
values(807,concat('s_',807),local_sender,concat('您购买',local_receiver,'的服务未处理，已失效'),0, '购买服务失效',0,3 );
 insert into tb_pushmessage(MessageText,doctorId,patientId,channelId,pushType,messagetype,messageTitle)
 values(concat('您购买',local_receiver,'的服务未处理，已失效'),concat('s_',807),local_sender,local_sender,1,807,'购买服务失效');
set local_status=(local_status-1);
end if;
end while;
insert into tb_purchaseservice_history(purchaseId,patientId,doctorId,state,consumePoint,transfertime) 
select purchaseId,patientid,doctorid,5 as state,consumePoint,createtime from tb_purchaseservice_relation 
where state=1 and createtime<date_sub(now(),interval 2 day );
delete from tb_purchaseservice_relation where state=1 and createtime <date_sub(now(),interval 2 day );
#结束游标
close local_message;
end