spring Boot接口映射文件中insert标签中的主键自增属性是什么？接口映射文件中如何开启主键自增？

useGeneratedKeys="true" keyProperty="uid">
    INSERT INTO t_user(
    username,password,salt,phone,email,gender,avatar,is_delete,created_user,created_time,modified_user,modified_time
    )VALUES(
    #{username},#{password},#{salt},#{phone},#{email},#{gender},#{avatar},#{isDelete},#{createdUser},#{createdTime},#{modifiedUser},#{modifiedTime}
    )