diff --git a/src/main/resources/mapper/DetailYMapper.xml b/src/main/resources/mapper/DetailYMapper.xml
index 4da1153..351d399 100644
--- a/src/main/resources/mapper/DetailYMapper.xml
+++ b/src/main/resources/mapper/DetailYMapper.xml
@@ -21,7 +21,7 @@
     detail_y
     <where>
 
-        <if test="num!=null">
+        <if test="num!=null and num.length > 0">
             and  recharge_coin NOT LIKE '-%'
             AND free_coin NOT LIKE '-%'
             AND task_coin NOT LIKE '-%'