mybatis批量插入使用sequence的技巧

<insert id="addCheckDetail" parameterType="java.util.List">  
        INSERT INTO CHECK_DETAIL(  
            CHECK_id,CHECK_DATE,CHECK_WEEK,EMP_CODE,CHECK_TIME,CHECK_LATE,CHECK_LEAVE_EARLY,  
            CHECK_EXCEPTION,CHECK_WORK_OVERTIME,EMP_NAME,DEPT_NAME,CHECK_LATE_TIME,DESCRIPTION  
          )  
          select CHECK_DETAIL_SEQ.NEXTVAL,cd.* from(  
          <foreach collection="list" item="item" index="index" separator="union all">  
              select  
                #{item.checkDate,jdbcType=VARCHAR},  
                #{item.checkWeek,jdbcType=VARCHAR},  
                #{item.empCode,jdbcType=VARCHAR},  
                #{item.checkTime,jdbcType=VARCHAR},  
                #{item.checkLate,jdbcType=VARCHAR},  
                #{item.checkLeaveEarly,jdbcType=VARCHAR},  
                #{item.checkException,jdbcType=VARCHAR},  
                #{item.checkWorkOverTime,jdbcType=VARCHAR},  
                #{item.empName,jdbcType=VARCHAR},  
                #{item.deptName,jdbcType=VARCHAR},  
                #{item.checkLateTime,jdbcType=VARCHAR},  
                #{item.description,jdbcType=VARCHAR}  
                from dual  
            </foreach>  
            ) cd  
    </insert>