diff --git a/src/main/resources/mapper/automatedWarehouse/WcsIntegrationMapper.xml b/src/main/resources/mapper/automatedWarehouse/WcsIntegrationMapper.xml
index bef113b..52d7464 100644
--- a/src/main/resources/mapper/automatedWarehouse/WcsIntegrationMapper.xml
+++ b/src/main/resources/mapper/automatedWarehouse/WcsIntegrationMapper.xml
@@ -285,6 +285,16 @@
         WHERE site = #{site} AND serial_no = #{serialNo}
     </delete>
     
+    <!-- rqrq - 检查上层是否有标签 -->
+    <select id="checkUpperLayerLabels" resultType="java.lang.Integer">
+        SELECT COUNT(1)
+        FROM pallet_detail WITH (NOLOCK)
+        WHERE site = #{site}
+          AND pallet_id = #{palletId}
+          AND position = #{position}
+          AND layer > #{layer}
+    </select>
+    
     <!-- rqrq - 批量删除指定序列号的托盘明细（性能优化：避免N+1查询）-->
     <delete id="batchDeletePalletDetailsBySerialNos">
         DELETE FROM pallet_detail