MySQL存储过程和任务

MySQL存储过程和任务

stored procedure
创建
create procedure sp_name()
begin
………
end

调用
call sp_name()
注意：存储过程名称后面必须加括号，哪怕该存储过程没有参数传递

删除
drop procedure sp_name

其他
1.show procedure status
显示数据库中所有存储的存储过程基本信息，包括所属数据库，存储过程名称，创建时间等
2.show create procedure sp_name
显示某一个存储过程的详细信息

例子:
CREATE PROCEDURE `bag_app_flow`()
insert into bag_app_flow
select pid,avg(in_speed),avg(out_speed),max(log_time) log_time
from bag_app_flow_raw
where hour(now()) - hour(log_time) = 1
group by pid,date_format(log_time,'%Y-%m-%d %H');

--------------
event
使用下列的任意一句开启计划任务：
           SET GLOBAL event_scheduler = ON;
           SET @@global.event_scheduler = ON;
           SET GLOBAL event_scheduler = 1;
           SET @@global.event_scheduler = 1;
Event Scheduler创建的基本语法是：
          CREATE EVENT      
          [IF NOT EXISTS]    
          event_name        
          ON SCHEDULE schedule  
          [ON COMPLETION [NOT] PRESERVE]
          [ENABLE | DISABLE]      
          [COMMENT 'comment']     
          DO sql_statement 
如果要调用procedure
    call sp_name() ,如
create event flow_job
on schedule every 1 hour
starts '2009-12-26 18:06:00'
do
call bag_ip_flow();
如果有多个procedures,则要加begin...end,如
create event flow_job
on schedule every 1 hour
starts '2009-12-26 18:06:00'
do
begin
call  bag_app_flow();
call bag_ip_flow();
call bag_ip_group_flow();
end