Question

执行此声明时：

CREATE TABLE MG_FOLDER (
  UUID CHAR(24) NOT NULL,
  NAME VARCHAR(100),
  OWNER VARCHAR(32),
  CREATED TIMESTAMP,
  MODIFIED TIMESTAMP,
  ARCH BOOLEAN,
  FOLDER_UUID CHAR(24),
  SERIAL INTEGER,
  CONSTRAINT FOLDER_PK PRIMARY KEY(UUID)
) ENGINE = InnoDB

我收到此错误：

Invalid default value for 'MODIFIED'

我认为我没有为MODIFIED设置默认值，那导致问题的原因是什么？

Answer 1

您需要在COLUMNS TIMESTAMP任意DEFAULT CURRENT_TIMESTAMP, CURRENT_TIMESTAMP(), or NOW()和其他DEFAULT NULL或两者都指定默认值为null，但必须指定...

CREATE TABLE IF NOT EXISTS `MG_FOLDER` (
  `UUID` char(24) COLLATE utf8_unicode_ci NOT NULL,
  `NAME` varchar(100) COLLATE utf8_unicode_ci DEFAULT NULL,
  `OWNER` varchar(32) COLLATE utf8_unicode_ci DEFAULT NULL,
  `CREATED` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `MODIFIED` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  `ARCH` tinyint(1) DEFAULT NULL,
  `FOLDER_UUID` char(24) COLLATE utf8_unicode_ci DEFAULT NULL,
  `SERIAL` int(11) DEFAULT NULL,
  PRIMARY KEY (`UUID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

MySQL <column> </column>的默认值无效

1 个答案: