ibatis 在只想查询部分字段时，resultMap如何配？？？

<resultMap id="cardSortResult" class="com.wulidou.bean.dictionary.transfer.CardSort" >
<!--
WARNING - This element is automatically generated by Abator for iBATIS, do not modify.
This element was generated on Wed Nov 04 15:33:25 CST 2009.
-->
<result column="id" property="id" jdbcType="INTEGER" />
<result column="named" property="named" jdbcType="VARCHAR" />
<result column="rank" property="rank" jdbcType="INTEGER" />
<result column="isShow" property="isShow" jdbcType="CHAR" />
</resultMap>

<resultMap id="cardSortResultAAAA" class="com.wulidou.bean.dictionary.transfer.CardSort" >
<!--
WARNING - This element is automatically generated by Abator for iBATIS, do not modify.
This element was generated on Wed Nov 04 15:33:25 CST 2009.
-->
<result column="id" property="id" jdbcType="INTEGER" />
<result column="named" property="named" jdbcType="VARCHAR" />
</resultMap>

<select id="queryAll" resultMap="cardSortResultAAAA">
select id, named from cardsort where isShow = '1' order by rank
</select>

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我有一个CardSort表，有四个字段。
如上配置，当我只想查询id 和 named 两个字段时候，经实验测试，必须得配置只有两个字段的resultMap才行，如果用原来的那个 id="cardSortResult" 则会报错说其余两个字段找不见什么的。
显然，这样非常麻烦，那么，怎么觉得这个问题呢？ 这个resultMap难道不能通用吗？ 请告诉解决办法。