mybatis中Date或者Time是stamp不能与空''字符串比较，会抛异常

      <!-- Date或者Time是stamp不能与空''字符串比较，会抛异常 -->
      <if test="marketdateStart != null and marketdateEnd != null"  >
        and MARKETDATE between #{marketdateStart} and #{marketdateEnd}
      </if>