if errors.Is(err, driver.ErrBadConn) {
			db.Mux.Lock()
			defer db.Mux.Unlock()

			go stmt.Close()
			delete(db.Stmts, query)
		}
	}
	return rows, err
}

func (db *PreparedStmtDB) QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row {
	stmt, err := db.prepare(ctx, db.ConnPool, false, query)
	if err == nil {
		return stmt.QueryRowContext(ctx, args...)
	}

func GetRelationsValues(ctx context.Context, reflectValue reflect.Value, rels []*Relationship) (reflectResults reflect.Value) {
	for _, rel := range rels {
		reflectResults = reflect.MakeSlice(reflect.SliceOf(reflect.PtrTo(rel.FieldSchema.ModelType)), 0, 1)

		appendToResults := func(value reflect.Value) {
			if _, isZero := rel.Field.ValueOf(ctx, value); !isZero {

		}
	})
}

func TestCancelTransaction(t *testing.T) {
	ctx := context.Background()
	ctx, cancelFunc := context.WithCancel(ctx)
	cancelFunc()

	user := *GetUser("cancel_transaction", Config{})
	DB.Create(&user)

	err := DB.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
		var result User
		tx.First(&result, user.ID)
		return nil
	})

}

func (S Tracer) Error(ctx context.Context, s string, i ...interface{}) {
	S.Logger.Error(ctx, s, i...)
}

func (S Tracer) Trace(ctx context.Context, begin time.Time, fc func() (sql string, rowsAffected int64), err error) {
	S.Logger.Trace(ctx, begin, fc, err)
	S.Test(ctx, begin, fc, err)

}

type NullString struct {
	sql.NullString
}

type Point struct {
	X, Y int
}

func (point Point) GormDataType() string {
	return "geo"
}

func (point Point) GormValue(ctx context.Context, db *gorm.DB) clause.Expr {
	return clause.Expr{
		SQL:  "ST_PointFromText(?)",
		Vars: []interface{}{fmt.Sprintf("POINT(%d %d)", point.X, point.Y)},
	}
}

func TestGORMValuer(t *testing.T) {

}

type ParamsFilter interface {
	ParamsFilter(ctx context.Context, sql string, params ...interface{}) (string, []interface{})
}

// ConnPool db conns pool interface
type ConnPool interface {
	PrepareContext(ctx context.Context, query string) (*sql.Stmt, error)
	ExecContext(ctx context.Context, query string, args ...interface{}) (sql.Result, error)
	QueryContext(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error)

	switch value := dbValue.(type) {
	case []byte:
		err = field.Set(ctx, dst, bytes.TrimPrefix(value, c.prefix))
	case string:
		err = field.Set(ctx, dst, strings.TrimPrefix(value, string(c.prefix)))
	default:
		err = fmt.Errorf("unsupported data %#v", dbValue)
	}
	return err
}

func (c *CustomSerializer) Value(ctx context.Context, field *schema.Field, dst reflect.Value, fieldValue interface{}) (interface{}, error) {

	gorm.Dialector
}

type printSQLLogger struct {
	logger.Interface
}

func (l *printSQLLogger) Trace(ctx context.Context, begin time.Time, fc func() (sql string, rowsAffected int64), err error) {
	sql, _ := fc()
	fmt.Println(sql + ";")
	l.Interface.Trace(ctx, begin, fc, err)
}

// GormDataTypeInterface gorm data type interface
type GormDataTypeInterface interface {

			case int8:
				field.ReflectValueOf(ctx, value).SetInt(int64(data))
			case int16:
				field.ReflectValueOf(ctx, value).SetInt(int64(data))
			case int32:
				field.ReflectValueOf(ctx, value).SetInt(int64(data))
			case uint:
				field.ReflectValueOf(ctx, value).SetInt(int64(data))
			case uint8:
				field.ReflectValueOf(ctx, value).SetInt(int64(data))
			case uint16:

					{Name: "Jinzhu Tool 2"},
				},
			},
		},
	}

	DB.Create(&users)

	query := make([]string, 0)
	sess := DB.Session(&gorm.Session{Logger: Tracer{
		Logger: DB.Config.Logger,
		Test: func(ctx context.Context, begin time.Time, fc func() (sql string, rowsAffected int64), err error) {
			sql, _ := fc()
			query = append(query, sql)
		},
	}})

	var result []User
	err := sess.
		Joins("Manager").