DELIMITER $$


ALTER DEFINER=`tobplan`@`%` EVENT `park_record_backup_event` ON SCHEDULE EVERY 1 DAY STARTS '2017-10-26 02:00:00' ON COMPLETION PRESERVE ENABLE DO BEGIN
    DECLARE month_var VARCHAR (200);
    DECLARE year_var VARCHAR (200);
    DECLARE month_len VARCHAR (200);
    
    DECLARE sql_var VARCHAR (200) DEFAULT NULL;
 
    DECLARE t_error INTEGER DEFAULT 0;
    DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET t_error=1;
    
    SELECT MONTH (DATE_SUB(CURDATE(),INTERVAL 66 DAY)) INTO month_var;  
    SELECT YEAR (DATE_SUB(CURDATE(),INTERVAL 66 DAY)) INTO year_var;  
    SELECT LENGTH(month_var) INTO month_len;
    
    IF month_len = 1 THEN
    SELECT
    CONCAT(
    'INSERT INTO park_record_',
    year_var,
    '0',
    month_var,
    ' SELECT *  FROM `park_record`  WHERE CREATE_DATE <= DATE_ADD(CURDATE(), INTERVAL - 66 DAY)',
    ';'
    ) INTO sql_var;  
    ELSE
    SELECT
    CONCAT(
    'INSERT INTO park_record_',
    year_var,
    month_var,
    ' SELECT *  FROM `park_record`  WHERE CREATE_DATE <= DATE_ADD(CURDATE(), INTERVAL - 66 DAY)',
    ';'
    ) INTO sql_var;
    END IF;  
    
    SET @sql_var = sql_var;  
    PREPARE stmt FROM @sql_var;
    
    START TRANSACTION;  
 EXECUTE stmt;
DEALLOCATE PREPARE stmt;
    
 DELETE 
 FROM
 park_record 
 WHERE CREATE_DATE <= DATE_ADD(CURDATE(), INTERVAL - 66 DAY) ;
    
IF t_error = 1 THEN    
        ROLLBACK;    
    ELSE    
        COMMIT;    
    END IF; 
END$$