非空判断

haoban-manage3-service/src/main/resources/mapper/TabHaobanMaterialCategoryMapper.xml

@@ -82,7 +82,7 @@
   </select>
 
   <select id="getMaxSortNum" resultType="java.lang.Integer">
-    select max(sort_num) from tab_haoban_material_category
+    select ifnull(max(sort_num),0) from tab_haoban_material_category
     where wx_enterprise_id = #{wxEnterpriseId}
     and category_parent_id = #{parentId} and status_flag = 1
   </select>