From 82a8bc62d5b9d5d607f6952329952b17eda2f0a0 Mon Sep 17 00:00:00 2001
From: liujie <1793218484@qq.com>
Date: 星期一, 14 九月 2026 15:44:34 +0800
Subject: [PATCH] update
---
backend/src/main/java/com/tourguide/modules/user/mapper/GuideUserMapper.java | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/backend/src/main/java/com/tourguide/modules/user/mapper/GuideUserMapper.java b/backend/src/main/java/com/tourguide/modules/user/mapper/GuideUserMapper.java
index f0cdde9..e2708bd 100644
--- a/backend/src/main/java/com/tourguide/modules/user/mapper/GuideUserMapper.java
+++ b/backend/src/main/java/com/tourguide/modules/user/mapper/GuideUserMapper.java
@@ -23,7 +23,7 @@
"WHERE id = #{guideId} AND deleted = 0 AND balance >= #{amount}")
int decreaseBalance(@Param("guideId") Long guideId, @Param("amount") BigDecimal amount);
- @Update("UPDATE guide_user SET balance = GREATEST(balance - #{amount}, 0), updated_at = NOW() " +
+ @Update("UPDATE guide_user SET balance = COALESCE(balance, 0) - #{amount}, updated_at = NOW() " +
"WHERE id = #{guideId} AND deleted = 0")
int decreaseBalanceForRefund(@Param("guideId") Long guideId, @Param("amount") BigDecimal amount);
--
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