修改sql

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

@@ -113,7 +113,7 @@
         <set>
             stock_count_ = stock_count_ - #{param.exchangeNum},
             consume_num_ =consume_num_ + #{param.exchangeNum},
-            <if test="warningStatus != null">
+            <if test="param.warningStatus != null">
                 warning_status_ = #{param.warningStatus},
             </if>
             update_time_ = NOW()