if err := DB.Exec("UPDATE named_users SET name1 = @name, name2 = @name2, name3 = @name", sql.Named("name", "jinzhu-new"), sql.Named("name2", "jinzhu-new2")).Error; err != nil {
		t.Errorf("failed to update with named arg")
	}

	namedUser.Name1 = "jinzhu-new"
	namedUser.Name2 = "jinzhu-new2"
	namedUser.Name3 = "jinzhu-new"

	var result5 NamedUser

				values[idx] = reflect.New(reflect.PtrTo(field.FieldType)).Interface()
				continue
			}
			values[idx] = new(interface{})
		}
	} else if len(columnTypes) > 0 {
		for idx, columnType := range columnTypes {
			if columnType.ScanType() != nil {
				values[idx] = reflect.New(reflect.PtrTo(columnType.ScanType())).Interface()
			} else {
				values[idx] = new(interface{})
			}
		}
	} else {

type JSONSerializer struct{}

// Scan implements serializer interface
func (JSONSerializer) Scan(ctx context.Context, field *Field, dst reflect.Value, dbValue interface{}) (err error) {
	fieldValue := reflect.New(field.FieldType)

	if dbValue != nil {
		var bytes []byte
		switch v := dbValue.(type) {
		case []byte:
			bytes = v
		case string:
			bytes = []byte(v)
		default:

		t.Fatalf("errors happened when update: %v", err)
	}

	var user2 User
	DB.Preload("Account").Find(&user2, "id = ?", user.ID)
	CheckUser(t, user2, user)

	user.Account.Number += "new"
	if err := DB.Save(&user).Error; err != nil {
		t.Fatalf("errors happened when update: %v", err)
	}

	var user3 User
	DB.Preload("Account").Find(&user3, "id = ?", user.ID)

	CheckUser(t, user2, user3)

}

func TestPreparedStmtInTransaction(t *testing.T) {
	user := User{Name: "jinzhu"}

	if err := DB.Transaction(func(tx *gorm.DB) error {
		tx.Session(&gorm.Session{PrepareStmt: true}).Create(&user)
		return errors.New("test")
	}); err == nil {
		t.Error(err)
	}

	var result User
	if err := DB.First(&result, user.ID).Error; err == nil {
		t.Errorf("Failed, got error: %v", err)
	}
}

		},
	}

	defer func() {
		if !reflect.DeepEqual(conn.got, conn.expect) {
			t.Errorf("expect %#v but got %#v", conn.expect, conn.got)
		}
	}()

	db, err := gorm.Open(mysql.New(mysql.Config{Conn: conn, DisableWithReturning: true}))
	if err != nil {
		t.Fatalf("Should open db success, but got %v", err)
	}

	tx := db.Begin()
	user := *GetUser("transaction", Config{})

	user := User{Name: "CreateUserTimestampOverride"}
	curTime := now.MustParse("2016-01-01")

	NEW := DB.Session(&gorm.Session{
		NowFunc: func() time.Time {
			return curTime
		},
	})

	NEW.Save(&user)

	AssertEqual(t, user.CreatedAt, curTime)
	AssertEqual(t, user.UpdatedAt, curTime)

	var newUser User
	NEW.First(&newUser, user.ID)

	AssertEqual(t, newUser.CreatedAt, curTime)

	return string(b[:]), err
}

func (c *Content) Scan(src interface{}) error {
	var value Content
	str, ok := src.(string)
	if !ok {
		byt, ok := src.([]byte)
		if !ok {
			return errors.New("Embedded.Scan byte assertion failed")
		}
		if err := json.Unmarshal(byt, &value); err != nil {
			return err
		}
	} else {
		if err := json.Unmarshal([]byte(str), &value); err != nil {
			return err
		}

	if stmt.Dest != nil {
		stmt.ReflectValue = reflect.ValueOf(stmt.Dest)
		for stmt.ReflectValue.Kind() == reflect.Ptr {
			if stmt.ReflectValue.IsNil() && stmt.ReflectValue.CanAddr() {
				stmt.ReflectValue.Set(reflect.New(stmt.ReflectValue.Type().Elem()))
			}

			stmt.ReflectValue = stmt.ReflectValue.Elem()
		}
		if !stmt.ReflectValue.IsValid() {
			db.AddError(ErrInvalidValue)
		}
	}

	for _, f := range p.fns {

	tx := DB.Model(&User{}).Where("name = ?", user1.Name).Session(&gorm.Session{})
	tx.Count(&count1)
	tx.Or("name in ?", []string{user2.Name, user3.Name}).Count(&count2)
	if count1 != 1 || count2 != 3 {
		t.Errorf("count after new session should works")
	}

	var count3 int64
	if err := DB.Model(&User{}).Where("name in ?", []string{user2.Name, user2.Name, user3.Name}).Group("id").Count(&count3).Error; err != nil {