sqlmap映射继承机制及映射字段顺序与SQL查询字段顺序无关

<typeAlias alias="TblSpPartsinfo" type="com.bn.car.biz.supply.dao.po.PartsInfoPO"/>

    <resultMap class="TblSpPartsinfo" id="TblSpPartsinfoResultMap">

        <result property="id" column="id"/>

        <result property="partsCode" column="parts_code"/>

        <result property="partsName" column="parts_name"/>

        <result property="bigTitle" column="big_title"/>

        <result property="smallTitle" column="small_title"/>

        <result property="storeNum" column="store_num"/>

        <result property="grade" column="grade"/>

        <result property="costPrice" column="cost_price"/>

        <result property="marketPrice" column="market_price"/>

        <result property="retailPrice" column="retail_price"/>

        <result property="weight" column="weight"/>

        <result property="weightUnit" column="weight_unit"/>

        <result property="vol" column="vol"/>

        <result property="volUnit" column="vol_unit"/>

        <result property="partsIntroduce" column="parts_introduce"/>

        <result property="specification" column="specification"/>

        <result property="packagingList" column="packaging_list"/>

        <result property="brandIntroduce" column="brand_introduce"/>

        <result property="usage" column="usage"/>

        <result property="aftersaleService" column="aftersale_service"/>

        <result property="createdDate" column="created_date"/>

        <result property="creater" column="creater"/>

        <result property="modifiedDate" column="modified_date"/>

        <result property="modifier" column="modifier"/>

        <result property="flag" column="flag"/>

        <result property="fPartsbrandId" column="f_partsbrand_id"/>

        <result property="fPartstypeId" column="f_partstype_id"/>

        <result property="fSupplyinfoId" column="f_supplyinfo_id"/>

        <result property="updown" column="updown"/>

        <result property="recommend" column="recommend"/>

        <result property="partsSource" column="parts_source"/>

        <result property="fPartstypeId2" column="f_partstype_id2"/>

        <result property="unionFlag" column="union_flag"/>

    </resultMap>

<!-- 组合产品子产品 -->

    <resultMap class="TblSpPartsinfo" id="TblSpPartsinfoResultMapWithUnion" extends="TblSpPartsinfoResultMap">

        <result property="lessPrice" column="less_price"/>

        <result property="newPrice" column="new_price"/>

    </resultMap>

<resultMap class="TblSpPartsinfo" id="TblSpPartsinfoResultMapBaoyang" extends="TblSpPartsinfoResultMap">

        <result property="fCareId" column="f_care_id"/>

        <result property="fCareItemId" column="f_care_item_id"/>

    </resultMap>
注意：extends="TblSpPartsinfoResultMap" 表示继承关系。
映射的字段顺序无关~!!，但是数量，名称与sql查询语句相等，名称写错了会报错，因为映射找不到。