From c7974e7f4023b4ef5b2fd37e15526d6f0f50b884 Mon Sep 17 00:00:00 2001
From: hello-dd-code <hello-dd-code@users.noreply.github.com>
Date: Sat, 28 Feb 2026 16:32:50 +0800
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---
 .../smoke_ddl_validation_2026-02-28.md        | 42 +++++++++++++++++++
 docs/sql/smoke.sql                            |  2 +-
 2 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 docs/sql/reports/smoke_ddl_validation_2026-02-28.md

diff --git a/docs/sql/reports/smoke_ddl_validation_2026-02-28.md b/docs/sql/reports/smoke_ddl_validation_2026-02-28.md
new file mode 100644
index 0000000..1b0d819
--- /dev/null
+++ b/docs/sql/reports/smoke_ddl_validation_2026-02-28.md
@@ -0,0 +1,42 @@
+# smoke.sql DDL 与迁移顺序验证（2026-02-28）
+
+对应 issue：`#9 [P0][T6] 校验 docs/sql/smoke.sql DDL 与迁移顺序`
+
+## 变更
+
+- 将 `fa_smoke_log` 的建表语句改为 `CREATE TABLE IF NOT EXISTS`，保证脚本可重复执行（增量场景不报错）。
+
+## 验证环境
+
+- MySQL: `mysql:8.0`（Docker 临时容器）
+- 数据库名：`wx_service`
+- SQL 文件：`docs/sql/smoke.sql`
+
+## 验证步骤与结果
+
+1. 空库初始化
+- 执行：首次导入 `smoke.sql`
+- 结果：成功，目标 5 张表全部创建（计数=5）
+
+2. 增量迁移
+- 执行：在同一库重复导入 `smoke.sql`
+- 结果：成功，无建表冲突（计数=5）
+
+3. 回滚可行性
+- 执行：按逆依赖顺序 `DROP TABLE` 后再次导入 `smoke.sql`
+- 结果：成功，可回滚后重建（计数=5）
+
+## 验证命令
+
+```bash
+# 1) 空库初始化
+mysql -h127.0.0.1 -uroot wx_service < /sql/smoke.sql
+
+# 2) 增量重放
+mysql -h127.0.0.1 -uroot wx_service < /sql/smoke.sql
+
+# 3) 回滚后重建
+mysql -h127.0.0.1 -uroot wx_service -e \
+  "DROP TABLE IF EXISTS fa_smoke_ai_next_smoke, fa_smoke_user_profile, fa_smoke_ai_advice_unlocks, fa_smoke_ai_advice, fa_smoke_log;"
+mysql -h127.0.0.1 -uroot wx_service < /sql/smoke.sql
+```
diff --git a/docs/sql/smoke.sql b/docs/sql/smoke.sql
index 015818a..50e7f9d 100644
--- a/docs/sql/smoke.sql
+++ b/docs/sql/smoke.sql
@@ -1,7 +1,7 @@
 -- 戒烟/抽烟记录主表
 -- 注意：该表字段来自旧系统（createtime/updatetime/deletetime 为秒级时间戳）
 
-CREATE TABLE `fa_smoke_log` (
+CREATE TABLE IF NOT EXISTS `fa_smoke_log` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `uid` int(11) NOT NULL COMMENT '用户ID',
   `smoke_time` date DEFAULT NULL COMMENT '抽烟时间',