mysql定时删除6个月前的表

查看定时是否开启：

查看event是否开启 : SHOW VARIABLES LIKE '%event_sche%';
将事件计划开启 : SET GLOBAL event_scheduler = 1;
将事件计划关闭 : SET GLOBAL event_scheduler = 0;

代码：

BEGIN
    -- 保存表名
    DECLARE v_tableName varchar(40) DEFAULT 0;
    -- 时间
    -- DECLARE v_datetime DATETIME;
    -- DECLARE v_datetime TIMESTAMP;
  --  遍历结束标记
  DECLARE done INT DEFAULT FALSE;
  -- 找出要删除的表名
    DECLARE cursor_table CURSOR FOR 
    SELECT TABLE_NAME FROM information_schema.`TABLES` 
    WHERE TABLE_NAME like 'info_illegal_web_%' AND TABLE_SCHEMA = 'ydb_illegal_data_his' AND LENGTH(TABLE_NAME) = 25;
  -- 将结束标志绑定到游标
   DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
    -- 设置时间
    -- SET v_datetime = UNIX_TIMESTAMP(DATE_SUB(SYSDATE(),INTERVAL 3 DAY));
  -- 打开游标
   OPEN cursor_table;
  
  -- 开始循环
  read_loop: LOOP
    FETCH cursor_table INTO v_tableName;
        
        -- 如果没有数据，退出
    IF done THEN
      LEAVE read_loop;
    END IF;

        -- 删除数据
        IF DATE(SUBSTR(v_tableName, 18)) <= DATE_SUB(CURDATE(),INTERVAL 6 MONTH) THEN
            SET @STMT :=CONCAT("DROP TABLE ",v_tableName);
            PREPARE STMT FROM @STMT;   
            EXECUTE STMT; 
            DEALLOCATE PREPARE STMT;
        END IF;
  END LOOP;

END