数据中心--采购在途计算新增负数判断条件

data-common/src/main/java/com/bailuntec/mapper/DcMidTransitMapper.xml

@@ -770,7 +770,7 @@
             tb1.bailun_sku AS bailun_sku,
             tb1.warehouse_code AS warehouse_code,
             tb1.purchase_id AS purchase_id,
-            sum( ( tb1.count - IFNULL( tb2.count, 0 ) ) ) AS count,
+            sum(  if((tb1.count - IFNULL( tb2.count, 0 )) < 0, 0, (tb1.count - IFNULL( tb2.count, 0 )))  ) AS count,
             price
         FROM
             (