无法使用存储的生成的主键插入表

时间:2019-05-10 08:30:35

标签: mysql primary-key

我无法使用生成的存储主键在表中插入数据。

我的桌子是:

CREATE TABLE `living_complex` (
  `id` bigint(32) GENERATED ALWAYS AS (`location_id`) STORED NOT NULL,
  `location_id` int(11) NOT NULL,
  `name` varchar(255) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `unq_living_complex_name` (`name`),
  KEY `idx_living_complex_location_id` (`location_id`),
  KEY `idx_living_complex_name` (`name`),
  CONSTRAINT `fk_living_complex_location_id` FOREIGN KEY (`location_id`) REFERENCES `location` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

我的插入语句:

INSERT INTO `reeve`.`living_complex` (`location_id`, `name`) 
                         VALUES ('1', 'some_living_complex');

错误是:

  

1048:列“ id”不能为空

我在create语句中没有NOT NULL关键字。为什么要求输入ID?

1 个答案:

答案 0 :(得分:0)

知道了。触发器出错

CREATE DEFINER=`root`@`localhost` TRIGGER `reeve`.`trg_living_complex_object_id` BEFORE INSERT ON `living_complex` FOR EACH ROW
BEGIN
    INSERT INTO `reeve`.`object` (
        `id`,
        `object_type_id`
    )
    VALUES (
        new.id, 
        (SELECT `object_type`.`id` FROM `reeve`.`object_type` WHERE `table_name` = 'living_complex')
    );
END

应该在插入之后。因为在插入之前我没有NEW.id(由表达式生成)。

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