[feat] 移除对 db 库的直接依赖

engine/engine_config.go

@@ -5,8 +5,6 @@ import (
 	"fmt"
 	"net/url"
 	"time"
-
-	"github.com/mattn/go-sqlite3"
 )
 
 type MockDBConfig struct {
@@ -56,7 +54,6 @@ type DBConfig struct {
 		Synchronous int
 		Cache       string
 		BusyTimeout int
-		Raw         func(*sqlite3.SQLiteConn) error
 	}
 
 	SQLServer struct {
@@ -142,33 +139,77 @@ func (c *DBConfig) toMySQLDSN() string {
 
 // toPostgreSQLDSN 生成 PostgreSQL DSN
 func (c *DBConfig) toPostgreSQLDSN() string {
-	params := url.Values{}
-	if c.Host != "" {
-		params.Add("host", c.Host)
-	} else if len(c.WriteHosts) > 0 {
-		params.Add("host", c.WriteHosts[0])
-	} else if len(c.ReadHosts) > 0 {
-		params.Add("host", c.ReadHosts[0])
+	// 构建连接字符串参数列表
+	var params []string
+
+	// 确定主机地址
+	host := c.Host
+	if host == "" && len(c.WriteHosts) > 0 {
+		host = c.WriteHosts[0]
 	}
-	if c.Port == "" {
-		c.Port = "5432" // 默认 PostgreSQL 端口
+	if host == "" && len(c.ReadHosts) > 0 {
+		host = c.ReadHosts[0]
 	}
-	params.Add("port", c.Port)
-	params.Add("dbname", c.Database)
-	params.Add("user", c.Username)
+	if host != "" {
+		params = append(params, fmt.Sprintf("host=%s", host))
+	}
+
+	// 设置端口
+	port := c.Port
+	if port == "" {
+		port = "5432" // 默认 PostgreSQL 端口
+	}
+	params = append(params, fmt.Sprintf("port=%s", port))
+
+	// 添加用户名
+	if c.Username != "" {
+		params = append(params, fmt.Sprintf("user=%s", c.Username))
+	}
+
+	// 添加密码
 	if c.Password != "" {
-		params.Add("password", c.Password)
+		params = append(params, fmt.Sprintf("password=%s", c.Password))
 	}
+
+	// 添加数据库名
+	if c.Database != "" {
+		params = append(params, fmt.Sprintf("dbname=%s", c.Database))
+	}
+
+	// 添加 SSL 模式
 	if c.PostgreSQL.Sslmode != "" {
-		params.Add("sslmode", c.PostgreSQL.Sslmode)
+		params = append(params, fmt.Sprintf("sslmode=%s", c.PostgreSQL.Sslmode))
 	}
+
+	// 添加连接超时
 	if c.PostgreSQL.ConnectTimeout > 0 {
-		params.Add("connect_timeout", fmt.Sprintf("%d", c.PostgreSQL.ConnectTimeout))
+		params = append(params, fmt.Sprintf("connect_timeout=%d", c.PostgreSQL.ConnectTimeout))
 	}
+
+	// 添加应用名称
 	if c.PostgreSQL.ApplicationName != "" {
-		params.Add("application_name", c.PostgreSQL.ApplicationName)
+		params = append(params, fmt.Sprintf("application_name=%s", c.PostgreSQL.ApplicationName))
 	}
-	return "postgres://" + c.Username + ":" + url.QueryEscape(c.Password) + "@" + params.Get("host") + ":" + c.Port + "/" + c.Database + "?" + params.Encode()
+
+	// 添加搜索路径
+	if c.PostgreSQL.SearchPath != "" {
+		params = append(params, fmt.Sprintf("search_path=%s", c.PostgreSQL.SearchPath))
+	}
+
+	// 用空格连接所有参数
+	return joinParams(params, " ")
+}
+
+// joinParams 连接参数列表
+func joinParams(params []string, sep string) string {
+	if len(params) == 0 {
+		return ""
+	}
+	result := params[0]
+	for i := 1; i < len(params); i++ {
+		result += sep + params[i]
+	}
+	return result
 }
 
 // toSQLiteDSN 生成 SQLite DSN
@@ -388,16 +429,6 @@ func WithSQLiteFile(file string) Option {
 	}
 }
 
-// SQLite 注册函数
-func WithSQLiteRaw(raw func(*sqlite3.SQLiteConn) error) Option {
-	return func(c *DBConfig) {
-		if c.Driver != "sqlite3" {
-			panic("WithSQLiteRegFn is only valid for sqlite3 driver")
-		}
-		c.SQLite.Raw = raw
-	}
-}
-
 func WithSQLiteJournal(journal string) Option {
 	return func(c *DBConfig) {
 		if c.Driver != "sqlite3" {