修复查询出来只有一个点的地图显示问题

ZhuDongming

2019-08-08 c5611a88478144d608710068f5afc96f084b5650

 src/main/resources/mapper/DeviceMapper.xml

@@ -414,4 +414,8 @@
         </if>
      )
   </select>
	
   <select id="getLimitDataByDevice" resultType="String">
      SELECT limit_val FROM view_device_density WHERE mac = #{mac}
   </select>
</mapper>