完成了第一版

src/main/java/com/greenorange/promotion/mapper/UserInfoMapper.java

@@ -3,6 +3,8 @@ package com.greenorange.promotion.mapper;
 import com.greenorange.promotion.model.entity.UserInfo;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 
+import java.util.List;
+
 /**
 * @author 35880
 * @description 针对表【user_info(用户基本信息表)】的数据库操作Mapper
@@ -11,6 +13,13 @@ import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 */
 public interface UserInfoMapper extends BaseMapper<UserInfo> {
 
+
+    /**
+     * 查询从 userId 一路到根节点的所有 id，按 depth 倒序（根先出）
+     */
+    List<Long> findPathToRoot(Long userId);
+
+
 }