mysql定時任務和儲存過程的小例子

上面說公升級的那裡，是要執行乙個定時任務，每三天執行一次。然後情況如下：

其實重點在於游標的應用和儲存過程的應用（語法挺重要的），貼上**：

delimiter $$

create
/*[definer = ]*/
procedure `test`.`yinliucount_new`()
/*language sql
| [not] deterministic
| | sql security 
| comment 'string'*/
begin
declare goodsid varchar(255);
declare keywordgoodsid varchar(255);
declare yinliuc int;
declare done int default 0;
declare cur cursor for select goodsurlid from store_goods;
declare continue handler for not found set done = 1;
open cur;
fetch cur into goodsid;
while done != 1 do
set keywordgoodsid = substring_index(goodsid,"_",-1);      
select count(*) into yinliuc from (select * from store_allkeyword where keywordid in(select keywordid from store_goods_keyword where goodsurlid = keywordgoodsid) group by keyword_name)d;    
if yinliuc is not null then
update store_goods set yinliu_count = yinliuc where goodsurlid = goodsid;
end if;          
fetch cur into goodsid;
end while;        
close cur;
end$$
delimiter ;

delimiter $$

-- set global event_scheduler = on$$     -- required for event to execute but not create    
create	/*[definer = ]*/	event `weanalysis`.`d`
on schedule every 2 day starts '2018-07-13 16:00:00'
on completion preserve
enable
/* uncomment the example below you want to use */
-- scheduleexample 1: run once
--  at 'yyyy-mm-dd hh:mm.ss'/current_timestamp 
-- scheduleexample 2: run at intervals forever after creation
-- every 1 [hour|month|week|day|minute|...]
-- scheduleexample 3: specified start time, end time and interval for execution
/*every 1  [hour|month|week|day|minute|...]
starts current_timestamp/'yyyy-mm-dd hh:mm.ss' 
ends current_timestamp/'yyyy-mm-dd hh:mm.ss'  */
/*[on completion [not] preserve]
[enable | disable]
[comment 'comment']*/
do	begin
call test.`yinliucount_new`;
end$$
delimiter ;

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