From c0ae40c638a92463376f665c0baee02bc2bb93af Mon Sep 17 00:00:00 2001
From: Syngnat <yangguofeng919@gmail.com>
Date: Sun, 10 May 2026 17:29:11 +0800
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20fix(mysql):=20=E4=BF=AE=E5=A4=8D?=
 =?UTF-8?q?=E6=97=A7=E7=89=88=20Windows=20=E6=97=A0=E6=B3=95=E8=A7=A3?=
 =?UTF-8?q?=E6=9E=90=20Asia/Shanghai=20=E6=97=B6=E5=8C=BA?=
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- 嵌入 Go IANA 时区数据，兼容 Windows Server 2012 等缺少 zoneinfo 的环境
- 保持 MySQL serverTimezone=GMT+8 到 loc=Asia/Shanghai 的时间语义
- 增加 MySQL DSN 时区解析回归测试
Refs #449
---
 internal/db/mysql_connection_params_test.go | 23 +++++++++++++++++++++
 internal/db/timezone_data.go                |  6 ++++++
 2 files changed, 29 insertions(+)
 create mode 100644 internal/db/timezone_data.go

diff --git a/internal/db/mysql_connection_params_test.go b/internal/db/mysql_connection_params_test.go
index 765d867..f98de79 100644
--- a/internal/db/mysql_connection_params_test.go
+++ b/internal/db/mysql_connection_params_test.go
@@ -1,6 +1,7 @@
 package db
 
 import (
+	"database/sql"
 	"net/url"
 	"strings"
 	"testing"
@@ -121,6 +122,28 @@ func TestMySQLDSN_MapsJDBCUTF8EncodingToMySQLCharset(t *testing.T) {
 	}
 }
 
+func TestMySQLDSN_AsiaShanghaiLocationAcceptedByDriver(t *testing.T) {
+	t.Parallel()
+
+	m := &MySQLDB{}
+	dsn, err := m.getDSN(connection.ConnectionConfig{
+		Host:             "127.0.0.1",
+		Port:             3306,
+		User:             "root",
+		Database:         "app",
+		ConnectionParams: "serverTimezone=GMT%2B8",
+	})
+	if err != nil {
+		t.Fatalf("getDSN failed: %v", err)
+	}
+
+	db, err := sql.Open("mysql", dsn)
+	if err != nil {
+		t.Fatalf("mysql driver should accept loc=Asia/Shanghai: %v", err)
+	}
+	_ = db.Close()
+}
+
 func TestMySQLDSN_URIParamsAndExplicitParamsPrecedence(t *testing.T) {
 	t.Parallel()
 
diff --git a/internal/db/timezone_data.go b/internal/db/timezone_data.go
new file mode 100644
index 0000000..b2857a0
--- /dev/null
+++ b/internal/db/timezone_data.go
@@ -0,0 +1,6 @@
+package db
+
+// Embed the IANA time zone database so Windows deployments without zoneinfo
+// files, such as Windows Server 2012, can still resolve locations like
+// Asia/Shanghai when database drivers parse DSN time zone parameters.
+import _ "time/tzdata"