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这个涉及2个步骤,第一个就是建立存储过程:
create procedure clear_table()
begin
drop database XXX
end
第二步就是让其定时运行:
查看event是否开启: show variables like '%sche%';
将事件计划开启: set global event_scheduler=1;
关闭事件任务: alter event e_test ON COMPLETION PRESERVE DISABLE;
开户事件任务: alter event e_test ON COMPLETION PRESERVE ENABLE;
创建event e_test
CREATE EVENT if not exists e_test
on schedule every 30 second
on completion preserve
do call clear_table();
create procedure clear_table()
begin
drop database XXX
end
第二步就是让其定时运行:
查看event是否开启: show variables like '%sche%';
将事件计划开启: set global event_scheduler=1;
关闭事件任务: alter event e_test ON COMPLETION PRESERVE DISABLE;
开户事件任务: alter event e_test ON COMPLETION PRESERVE ENABLE;
创建event e_test
CREATE EVENT if not exists e_test
on schedule every 30 second
on completion preserve
do call clear_table();
追问
我运行 执行第一句 她说 Empty set 将事件计划开启: 她报错说Unknown system variable 'event_scheduler' 我该怎么办?
追答
set global event_scheduler=1; 可以执行吗?执行完就执行
CREATE EVENT if not exists e_test
on schedule every 30 second
on completion preserve
do call clear_table();
再执行alter event e_test ON COMPLETION PRESERVE ENABLE;
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