diff --git a/src/main/resources/mapper/pms/QcMapper.xml b/src/main/resources/mapper/pms/QcMapper.xml
index b527c1c..5b35a42 100644
--- a/src/main/resources/mapper/pms/QcMapper.xml
+++ b/src/main/resources/mapper/pms/QcMapper.xml
@@ -1007,6 +1007,7 @@
         </where>
     </select>
 
+    <!-- 轮询时获取数据的sql 若数据量较大可先从优化sql入手，此sql原型为qcPartAttributeSearch 注：非必要无需使用异步轮询 -->
     <select id="selectExportList" parameterType="QcPartAttributeData" resultType="QcPartAttributeExportVO">
         SELECT
         bu.bu_desc               AS buDesc,