Question

我正在创建一个触发器，当它从学生表中删除时保存历史记录，但是当我执行触发器代码来创建它时，我收到错误消息“抱歉发生意外错误！”而且字面上不知道该怎么做。

学生表：

CREATE TABLE `Student` (
  `IDstudent` varchar(5) COLLATE utf32_spanish_ci NOT NULL,
  `Names` varchar(40) COLLATE utf32_spanish_ci NOT NULL,
  `SecNames` varchar(40) COLLATE utf32_spanish_ci NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf32 COLLATE=utf32_spanish_ci;

ALTER TABLE `Student`
  ADD PRIMARY KEY (`IDstudent`);
COMMIT;

删除学生表：

CREATE TABLE `DeletedStudents` (
  `IDstudent ` varchar(5) COLLATE utf32_spanish_ci NOT NULL,
  `Names ` varchar(30) COLLATE utf32_spanish_ci NOT NULL,
  `SecNames ` varchar(30) COLLATE utf32_spanish_ci NOT NULL,
  `DateDeleted` date NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf32 COLLATE=utf32_spanish_ci;

ALTER TABLE `DeletedStudents`
  ADD PRIMARY KEY (`IDstudent`);

ALTER TABLE `DeletedStudents`
  ADD CONSTRAINT `DeletedStudents_ibfk_1` FOREIGN KEY (`IDstudent`) 
REFERENCES `Student` (`IDstudent`);
COMMIT;

触发：

DELIMITER
\\
CREATE TRIGGER TR_Delete_Student AFTER DELETE
ON
Student FOR EACH ROW
BEGIN
INSERT INTO DeletedStudents(
    IDstudent,
    Names,
    SecNames,
    DateDeleted
)
VALUES(
old.IDstudent,
old.Names,
old.SecNames,
NOW()) ;
END \\
DELIMITER
;

Answer 1

我遇到了同样的错误，我知道MySql将我们的输入作为原始字符串获取，并随后将其解析为sql语法（在后端），因此使用DELIMITER \\可能会在提供的原始字符串输入因此引发错误“对不起，发生了意外错误！”这当然是解析器的错误（我不是MySql）。因此，解决方案是将\\以外的任何内容用作DELIMITER。

MySQL - 抱歉发生意外错误

1 个答案: