MySQL Event History

 
 demand 

  Job history of SQL Server (Job) record is stored in the msdb database, it is easy to query related Job definitions, program and history, and MySQL's event has no history. To facilitate the viewing event is normal to do and results to achieve similar functionality by following two steps. 

 
 achieve 

 
 1. Create a history table event performed in mysql database 

 
  DROP TABLE IF EXISTS `mysql`.`udf_event_history`;
CREATE TABLE `mysql`.`udf_event_history` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`event_gid` varchar(36) NOT NULL,
`db_name` varchar(128) NOT NULL DEFAULT '',
`event_name` varchar(128) NOT NULL DEFAULT '',
`start_time` datetime(3) NOT NULL DEFAULT current_timestamp(),
`end_time` datetime(3) DEFAULT NULL,
`is_success` tinyint(4) DEFAULT 0,
`duration` decimal(15,3) DEFAULT NULL,
`error_msg` varchar(512) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `idx_event_git` (`event_gid`),
KEY `idx_db_event_name` (`db_name`,`event_name`),
KEY `idx_s_e_time` (`start_time`,`end_time`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4; 
 
 
2. Creating event according to the following built templates

   Please pay attention to modify the relevant information according to the actual situation 
 
 
   USE db1;

DELIMITER $$

CREATE DEFINER=`root`@`localhost` EVENT `event_test1` 
ON SCHEDULE EVERY 1 MINUTE STARTS '2019-01-01 00:00:00' 
ON COMPLETION PRESERVE ENABLE DO 
BEGIN  
    DECLARE r_code CHAR(5) DEFAULT '00000';  
    DECLARE r_msg TEXT;  
    DECLARE v_error INT;  
    DECLARE v_start_time DATETIME(3) DEFAULT NOW(3);
    DECLARE v_event_gid VARCHAR(36) DEFAULT UPPER(REPLACE(UUID(),'-',''));  
    
    /*修改为实际的event名*/
    INSERT INTO mysql.udf_event_history (db_name, event_name, start_time, event_gid)  
    VALUES(DATABASE(), 'event_test1', v_start_time, v_event_gid);    
      
    BEGIN     
        DECLARE CONTINUE HANDLER FOR SQLEXCEPTION    
        BEGIN  
            SET  v_error = 1;  
            GET DIAGNOSTICS CONDITION 1 r_code = RETURNED_SQLSTATE, r_msg = MESSAGE_TEXT;  
        END;  
        /*实际要执行语句或存储过程，等*/
        CALL db1.usp_1();
    END;  
      
    UPDATE mysql.udf_event_history 
    SET end_time = NOW(3), is_success = ISNULL(v_error), duration = TIMESTAMPDIFF(microsecond,start_time, NOW(3)) / 1000000, 
    error_msg = CONCAT('error = ', r_code,', message = ', r_msg)
    WHERE event_gid = v_event_gid;  
      
END$$  
DELIMITER ;  
  
 
通过查询mysql.udf_event_history表，可以知道event的开始结束时间、是否成功、执行时长、错误信息，等，为管理日常调度计划提供方便。
 
    root@localhost [db1]select * from mysql.udf_event_history limit 2\G;
*************************** 1. row ***************************
        id: 1
   db_name: db1
event_name: event_test1
start_time: 2019-12-03 15:44:00.000
  end_time: 2019-12-03 15:44:00.001
is_success: 0
  duration: 0.001
 error_msg: error = 42000, message = PROCEDURE db1.usp_2 does not exist
 event_gid: AB305D8C15A011EAB822005056AB041E
*************************** 2. row ***************************
        id: 2
   db_name: db1
event_name: event_test2
start_time: 2019-12-03 15:46:00.000
  end_time: 2019-12-03 15:46:05.405
is_success: 1
  duration: 5.405
 error_msg: NULL
 event_gid: F2B6197C15A011EAB822005056AB041E 
   
 
参考
 
   https://blog.csdn.net/wrh_csdn/article/details/79712778 
  

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