修改sql

mec-biz/src/main/resources/config/mybatis/SysCouponIssueRecordMapper.xml

@@ -152,7 +152,7 @@
             create_time_,
             update_time_,
             tenant_id_,
-            IFNULL(b.couponNum,0) AS canBeGetNum
+            a.`limit_exchange_num_` - IFNULL(b.couponNum,0) AS canBeGetNum
         FROM
             sys_coupon AS a
                 LEFT JOIN