mybatis resultMap 映射配置

现有数据库表：

CREATE TABLE `dept_p` (
  `DEPT_ID` varchar(40) NOT NULL,
  `DEPT_NAME` varchar(50) DEFAULT NULL,
  `PARENT_ID` varchar(40) DEFAULT NULL COMMENT '自关联，多对一',
  `STATE` int(11) DEFAULT NULL COMMENT '1启用0停用',
  `CREATE_BY` varchar(40) DEFAULT NULL COMMENT '登录人编号',
  `CREATE_DEPT` varchar(40) DEFAULT NULL COMMENT '登录人所属部门编号',
  `CREATE_TIME` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `UPDATE_BY` varchar(40) DEFAULT NULL,
  `UPDATE_TIME` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  PRIMARY KEY (`DEPT_ID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

mybatis的xml文件：

<!-- 需要显示部门的全部信息，并且需要显示上级部门的ID和上级部门的名称 -->
<select id="findDeptList" resultMap="deptRM">
SELECT * FROM 
(SELECT * FROM dept_p)d
LEFT JOIN
(SELECT dept_id AS p_id,dept_name AS p_name FROM dept_p)p
ON d.parent_id=p.p_id
ORDER BY dept_id
</select>

<!--封装结果集 -->
<resultMap type="Dept" id="deptRM" autoMapping="true">
<id property="deptId" column="DEPT_ID"/>
<id property="deptName" column="DEPT_NAME"/>
<id property="state" column="STATE"/>
<id property="createTime" column="CREATE_TIME"/>
<id property="updateTime" column="UPDATE_TIME"/>
<!--封装上级部门 一对一 -->
<association property="parentDept" javaType="Dept">
<id property="deptId" column="P_ID"/>
<result property="deptName" column="P_NAME"/>
</association>
</resultMap>