ALTER TABLE `vn2008`.`department` 
ADD COLUMN `parentFk` INT UNSIGNED NULL AFTER `sons`,
ADD COLUMN `path` VARCHAR(255) NULL AFTER `parentFk`,
CHANGE COLUMN `sons` `sons` DECIMAL(10,0) NOT NULL DEFAULT '0' ;

USE `vn`;
CREATE 
     OR REPLACE ALGORITHM = UNDEFINED 
    DEFINER = `root`@`%` 
    SQL SECURITY DEFINER
VIEW `department` AS
    SELECT 
        `b`.`department_id` AS `id`,
        `b`.`name` AS `name`,
        `b`.`production` AS `isProduction`,
        `b`.`parentFk` AS `parentFk`,
        `b`.`path` AS `path`,
        `b`.`lft` AS `lft`,
        `b`.`rgt` AS `rgt`,
        `b`.`isSelected` AS `isSelected`,
        `b`.`depth` AS `depth`,
        `b`.`sons` AS `sons`
    FROM
        `vn2008`.`department` `b`;

DROP TRIGGER IF EXISTS `vn2008`.`department_AFTER_DELETE`;

DELIMITER $$
USE `vn2008`$$
CREATE DEFINER = CURRENT_USER TRIGGER `vn2008`.`department_AFTER_DELETE` 
    AFTER DELETE ON `department` FOR EACH ROW
BEGIN
	UPDATE vn.department_recalc SET isChanged = TRUE;
END$$
DELIMITER ;

DROP TRIGGER IF EXISTS `vn2008`.`department_BEFORE_INSERT`;

DELIMITER $$
USE `vn2008`$$
CREATE DEFINER = CURRENT_USER TRIGGER `vn2008`.`department_BEFORE_INSERT` 
	BEFORE INSERT ON `department` FOR EACH ROW
BEGIN
	UPDATE vn.department_recalc SET isChanged = TRUE;
END$$
DELIMITER ;

DROP TRIGGER IF EXISTS `vn2008`.`department_AFTER_UPDATE`;

DELIMITER $$
USE `vn2008`$$
CREATE DEFINER = CURRENT_USER TRIGGER `vn2008`.`department_AFTER_UPDATE` 
	AFTER UPDATE ON `department` FOR EACH ROW
BEGIN
	IF !(OLD.parentFk <=> NEW.parentFk) THEN
		UPDATE vn.department_recalc SET isChanged = TRUE;
	END IF;
END$$
DELIMITER ;

CREATE TABLE `vn`.`department_recalc` (
  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `isChanged` TINYINT(4) NOT NULL,
  PRIMARY KEY (`id`));

INSERT INTO `vn`.`department_recalc` (`id`, `isChanged`) VALUES ('1', '0');


ALTER TABLE `vn2008`.`department` 
CHANGE COLUMN `lft` `lft` INT(11) NULL ,
CHANGE COLUMN `rgt` `rgt` INT(11) NULL ;

UPDATE vn.department SET lft = NULL, rgt = NULL;