init

ruoyi-cai/src/main/resources/mapper/cai/CaiAccountMapper.xml

@@ -27,6 +27,11 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         set coin = coin + #{coin}, income_coin = income_coin + #{incomeCoin}
         where user_id = #{userId}
     </update>
+    <update id="decrIncomeCoin">
+        update cai_account
+        set income_coin = income_coin - #{value}
+        where user_id = #{userId} and (income_coin - #{value}) > 0
+    </update>
 
 
 </mapper>