MySQL触发器 Update触发Insert失败
今天工作需要,想要实现将仅对状态更新的表进行历史记录显示,于是考虑在原表中建立触发器,将更新的内容同时写入另一张表
于是进行测试
--建立测试表CREATE TABLE `triggletest_triggle` (
`id` INT(11) NOT NULL,
`name` VARCHAR(5) NULL DEFAULT NULL,
PRIMARY KEY (`id`)
)
COLLATE='latin1_swedish_ci'
ENGINE=InnoDB
--建立目标表
CREATE TABLE `triggletest` (
`seq` INT(11) NOT NULL,
`id` INT(11) NOT NULL,
`name` VARCHAR(5) NULL DEFAULT NULL,
PRIMARY KEY (`seq`),
INDEX `id` (`id`)
)
COLLATE='latin1_swedish_ci'
ENGINE=InnoDB;
---写入测试数据
INSERT INTO `triggletest_triggle` VALUES(1,'A');
--建立触发器
DROP TRIGGER if EXISTS test1
CREATE TRIGGER test1
AFTER UPDATE ON triggletest_triggle
FOR EACH ROW
BEGIN
INSERT INTO triggletest(id) values (new.id);
END
执行触发器语句,报错,报错内容如下:
/* SQL错误(1064):You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'CREATE TRIGGER test1
AFTER UPDATE ON triggletest_triggle
FOR EACH ROW
BEGIN ' at line 2 */
---最终实现代码
DROP TRIGGER if EXISTS test1;
CREATE TRIGGER test1 AFTER UPDATE ON test.triggletest_triggle FOR EACH ROW
BEGIN
INSERT INTO triggletest(id,name) values (new.id,new.name);
END;
分析,由于访问工具HediSQL,导致无法正常创建触发器,相同语句,在HediSQL中执行,报错,使用shell调用mysql,直接执行程序,成功。
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