今天在写代码的时候遇到了一个问题：

比方说我的数据库如下：

其中work_position和auth都是外键，关联了另一张表。
但我现在要往mysql里插入一条数据，如下：

insert into t_employee_info(salary, work_time, work_position, auth) VALUES(2000,'8:00',1,1)

就会弹出错误：

[2024-02-28 22:30:07] [23000][1452] Cannot add or update a child row: a foreign key constraint fails (`museum`.`t_employee_info`, CONSTRAINT `t_employee_info_t_user_id_fk` FOREIGN KEY (`id`) REFERENCES `t_user` (`id`))
[2024-02-28 22:30:07] [23000][1452] Cannot add or update a child row: a foreign key constraint fails (`museum`.`t_employee_info`, CONSTRAINT `t_employee_info_t_user_id_fk` FOREIGN KEY (`id`) REFERENCES `t_user` (`id`))

搜索了很多解决方法，能在sql查询中解决的办法，比较好的是在运行插入前关闭外键，结束插入时开启外键，如下：

set foreign_key_checks = 0;
insert into t_employee_info(salary, work_time, work_position, auth) VALUES
(2000,'8:00',1,1);
set foreign_key_checks = 1;

但要放在mybatis中运行，就不支持set foreign_key_checks这句话了。

报错提示：

[2024-02-28 22:23:49] [42000][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 'set
[2024-02-28 22:23:49] foreign_key_checks = 1' at line 12
[2024-02-28 22:23:49] [42000][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 'set
[2024-02-28 22:23:49] foreign_key_checks = 1' at line 12 

 最后搜索了很多办法，发现仅仅是一个标点符号：``的问题
将代码修改为：

    <insert id="addEmployeeInfo" keyColumn="id" keyProperty="id" parameterType="com.museum.domain.po.EmployeeInfo" useGeneratedKeys="true">
<!--        set foreign_key_checks = 0;-->insert into t_employee_info(salary,work_time,`work_position`,`auth`)values (#{salary,jdbcType=DOUBLE},#{workTime,jdbcType=VARCHAR},#{workPosition,jdbcType=INTEGER},#{auth,jdbcType=INTEGER})set foreign_key_checks = 1;</insert>

即在是外键的字段外用``包裹起来即能成功运行。