MYSQL ‘ON UPDATE CURRENT_TIMESTAMP(3)‘ 版本之间不兼容问题

从mariaDB导出数据到普通mysql中，加粗的地方会报错，修改了一下换成蓝色字体的触发器形式实现，就好了。

DROP TABLE IF EXISTS `act_evt_log`;

CREATE TABLE `act_evt_log` (
  `LOG_NR_` bigint(20) NOT NULL AUTO_INCREMENT,
  `TYPE_` varchar(64) COLLATE utf8_bin DEFAULT NULL,
  `PROC_DEF_ID_` varchar(64) COLLATE utf8_bin DEFAULT NULL,
  `PROC_INST_ID_` varchar(64) COLLATE utf8_bin DEFAULT NULL,
  `EXECUTION_ID_` varchar(64) COLLATE utf8_bin DEFAULT NULL,
  `TASK_ID_` varchar(64) COLLATE utf8_bin DEFAULT NULL,
  `TIME_STAMP_` timestamp(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  `USER_ID_` varchar(255) COLLATE utf8_bin DEFAULT NULL,
  `DATA_` longblob,
  `LOCK_OWNER_` varchar(255) COLLATE utf8_bin DEFAULT NULL,
  `LOCK_TIME_` timestamp(3) NULL DEFAULT NULL,
  `IS_PROCESSED_` tinyint(4) DEFAULT '0',
  PRIMARY KEY (`LOG_NR_`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

DROP TABLE IF EXISTS `act_evt_log`;
CREATE TABLE `act_evt_log` (
  `LOG_NR_` bigint(20) NOT NULL AUTO_INCREMENT,
  `TYPE_` varchar(64) COLLATE utf8_bin DEFAULT NULL,
  `PROC_DEF_ID_` varchar(64) COLLATE utf8_bin DEFAULT NULL,
  `PROC_INST_ID_` varchar(64) COLLATE utf8_bin DEFAULT NULL,
  `EXECUTION_ID_` varchar(64) COLLATE utf8_bin DEFAULT NULL,
  `TASK_ID_` varchar(64) COLLATE utf8_bin DEFAULT NULL,
  `TIME_STAMP_` timestamp(3) NOT NULL,
  `USER_ID_` varchar(255) COLLATE utf8_bin DEFAULT NULL,
  `DATA_` longblob,
  `LOCK_OWNER_` varchar(255) COLLATE utf8_bin DEFAULT NULL,
  `LOCK_TIME_` timestamp(3) NULL DEFAULT NULL,
  `IS_PROCESSED_` tinyint(4) DEFAULT '0',
  PRIMARY KEY (`LOG_NR_`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
DROP TRIGGER IF EXISTS `update_activity_trigger`;
DELIMITER //
CREATE TRIGGER `update_act_evt_log_trigger` BEFORE UPDATE ON `act_evt_log`
 FOR EACH ROW SET NEW.`TIME_STAMP_` = NOW()
//
DELIMITER ;