Question

CREATE EVENT `set_trips_finished`
  ON SCHEDULE EVERY 1 DAY STARTS '2015-08-25 01:50:00'
  ON COMPLETION PRESERVE
DO BEGIN

  UPDATE trips
  SET status = 0
  WHERE date(created_at) < curdate();

END;

是计划任务。但这些领域并没有得到更新。当我只运行查询时 - 字段得到更新。

我有另一个计划任务，语法相同，只计划在5分钟后运行，并且运行正常。

我不明白为什么这个任务不会运行，或者查询是否没有更新表格......有什么建议吗？

更新

我删除了另一个计划任务（正在运行的任务），并再次设置它们，现在都不会触发......

Answer 1

查看事件调度程序是否正在运行：

show variables where variable_name='event_scheduler';
+-----------------+-------+
| Variable_name   | Value |
+-----------------+-------+
| event_scheduler | OFF   |
+-----------------+-------+

<强>都能跟得上

创建我的测试表：

create table trips
(   id int auto_increment primary key,
    status int not null,
    created_at date not null
);
insert trips(status,created_at) values (0,'2014-09-09');

创建我的活动：

DELIMITER $$
CREATE EVENT `set_trips_finished`
  ON SCHEDULE EVERY 1 MINUTE STARTS '2015-08-23 00:00:00'
  ON COMPLETION PRESERVE
DO BEGIN

  UPDATE trips
  SET status = status+1
  WHERE date(created_at) < curdate();

END;$$
DELIMITER ;

按架构名称列出所有事件：

show events from so_gibberish;

or

show events\G; -- <--------- I like this one from mysql> prompt
show events; -- <--------- from workbench / sqlyog


*************************** 1. row ***************************
                  Db: so_gibberish
                Name: set_trips_finished
             Definer: GuySmiley@localhost
           Time zone: SYSTEM
                Type: RECURRING
          Execute at: NULL
      Interval value: 1
      Interval field: MINUTE
              Starts: 2015-08-23 00:00:00
                Ends: NULL
              Status: ENABLED
          Originator: 1
character_set_client: utf8
collation_connection: utf8_general_ci
  Database Collation: utf8_general_ci

查看可能更新状态的数据：

select * from trips;
+----+--------+------------+
| id | status | created_at |
+----+--------+------------+
|  1 |      0 | 2014-09-09 |
+----+--------+------------+

好吧，我可以整天等待，事件甚至没有打开

SET GLOBAL event_scheduler = ON;    -- turn her on

show variables where variable_name='event_scheduler';
+-----------------+-------+
| Variable_name   | Value |
+-----------------+-------+
| event_scheduler | ON    |
+-----------------+-------+

等几分钟（注意我的活动每分钟运行一次）

select * from trips;
+----+--------+------------+
| id | status | created_at |
+----+--------+------------+
|  1 |      3 | 2014-09-09 |
+----+--------+------------+

事件已经运行了3次。好的，看起来不错。

SET GLOBAL event_scheduler = OFF;   -- turn her off if so desired

预定任务不会运行

1 个答案: