我有下面的表格模式；
CREATE TABLE `db1`.`sms_queue` (
`Id` INTEGER UNSIGNED NOT NULL AUTO_INCREMENT,
`Message` VARCHAR(160) NOT NULL DEFAULT 'Unknown Message Error',
`CurrentState` VARCHAR(10) NOT NULL DEFAULT 'None',
`Phone` VARCHAR(14) DEFAULT NULL,
`Created` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
`LastUpdated` TIMESTAMP NOT NULL ON UPDATE CURRENT_TIMESTAMP,
`TriesLeft` tinyint NOT NULL DEFAULT 3,
PRIMARY KEY (`Id`)
)
ENGINE = InnoDB;
它失败，出现以下错误:
ERROR 1293 (HY000): Incorrect table definition; there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT or ON UPDATE clause.
我的问题是，我能同时拥有这两个字段吗？或者我必须在每次交易中手动设置LastUpdated字段吗？