mybatis 配置返回集合collection时只有一条记录

<select id="selectCustomerList" resultMap="CustomerDtoMap" parameterType="map">
    select * from
    (
        select <include refid="AliasCustomerColumnList"/>
        from customer c
    ) c
    left join display_venue_reserve dvr
    on c.c_customer_id = dvr.customer_id where 1=1
    <if test="customerMgrId != null">
        and c.c_customer_mgr_id = #{customerMgrId}
    </if>
    <if test="status != null">
        and dvr.status = #{status}
    </if>
</select>

<resultMap id="CustomerDtoMap" type="com.al.ec.showroom.dto.customer.CustomerDto" extends="AliasBaseResultMap">
        <collection property="displayVenueReserveDtoList" ofType="com.al.ec.showroom.dto.display.DisplayVenueReserveDto">
            <association property="displayVenueReserve" column="VENUE_RESERVE_ID" javaType="com.al.ec.showroom.model.display.DisplayVenueReserve"
                         resultMap="com.al.ec.showroom.mapper.display.DisplayVenueReserveMapper.BaseResultMap">
            </association>
        </collection>
    </resultMap>

<id column="dvr_VENUE_RESERVE_ID" property="venueReserveId" jdbcType="DECIMAL"></id>

<resultMap id="CustomerDtoMap" type="com.al.ec.showroom.dto.customer.CustomerDto" extends="AliasBaseResultMap">
        <collection property="displayVenueReserveDtoList" ofType="com.al.ec.showroom.dto.display.DisplayVenueReserveDto">
            <id column="VENUE_RESERVE_ID" property="venueReserveId" jdbcType="DECIMAL"></id>
            <association property="displayVenueReserve" column="VENUE_RESERVE_ID" javaType="com.al.ec.showroom.model.display.DisplayVenueReserve"
                         resultMap="com.al.ec.showroom.mapper.display.DisplayVenueReserveMapper.AliasBaseResultMap">
            </association>
        </collection>
    </resultMap>