mybatis批量插入oracle数据

<insert id="insertBatch" parameterType="java.util.List">
    insert into REPORT_CARD_NAMELIST_STATISTIC (
    STATISTIC_TIME, GRAY_NAMELIST_CARD_NO, RELATE_CARD_NO, MER_CODE, SUCC_TRANS_AMOUNT, TRANS_AMOUNT, SUCC_TRANS_NUM  , TRANS_NUM, STATISTIC_TYPE)
    <foreach collection="list" item="item" index="index" separator="union all">
        (
        select
        #{item.statisticTime}, #{item.grayNamelistCardNo}, #{item.relateCardNo}	,#{item.merCode,jdbcType=VARCHAR},
        #{item.succTransAmount}, #{item.transAmount}, #{item.succTransNum} ,#{item.transNum} ,#{item.statisticType}
        from dual
        )
    </foreach>
</insert>