vm = make(visitMap)
	if loaded = loadOrStoreVisitMap(&vm, reflect.ValueOf(&t1)); loaded {
		t.Fatalf("loaded should be false")
	}

	if loaded = loadOrStoreVisitMap(&vm, reflect.ValueOf(&t1)); !loaded {
		t.Fatalf("loaded should be true")
	}

	// t1 already exist but t2 not
	if loaded = loadOrStoreVisitMap(&vm, reflect.ValueOf([]*testM{&t1, &t2, &t3})); loaded {
		t.Fatalf("loaded should be false")
	}

	vm = make(visitMap)
	if loaded = loadOrStoreVisitMap(&vm, reflect.ValueOf(&t1)); loaded {
		t.Fatalf("loaded should be false")
	}

	if loaded = loadOrStoreVisitMap(&vm, reflect.ValueOf(&t1)); !loaded {
		t.Fatalf("loaded should be true")
	}

	// t1 already exist but t2 not
	if loaded = loadOrStoreVisitMap(&vm, reflect.ValueOf([]*testM{&t1, &t2, &t3})); loaded {
		t.Fatalf("loaded should be false")
	}

		}
	}
}

func scanIntoMap(mapValue map[string]interface{}, values []interface{}, columns []string) {
	for idx, column := range columns {
		if reflectValue := reflect.Indirect(reflect.Indirect(reflect.ValueOf(values[idx]))); reflectValue.IsValid() {
			mapValue[column] = reflectValue.Interface()
			if valuer, ok := mapValue[column].(driver.Valuer); ok {
				mapValue[column], _ = valuer.Value()

				if reflect.ValueOf(got).Len() == reflect.ValueOf(expect).Len() {
					for i := 0; i < reflect.ValueOf(got).Len(); i++ {
						name := fmt.Sprintf(reflect.ValueOf(got).Type().Name()+" #%v", i)
						t.Run(name, func(t *testing.T) {
							AssertEqual(t, reflect.ValueOf(got).Index(i).Interface(), reflect.ValueOf(expect).Index(i).Interface())
						})
					}
				} else {
					name := reflect.ValueOf(got).Type().Elem().Name()

							if _, zero := rel.Field.ValueOf(db.Statement.Context, obj); !zero {
								rv := rel.Field.ReflectValueOf(db.Statement.Context, obj)
								if rv.Kind() != reflect.Ptr {
									rv = rv.Addr()
								}

								for _, ref := range rel.References {
									if ref.OwnPrimaryKey {
										fv, _ := ref.PrimaryKey.ValueOf(db.Statement.Context, obj)

	return
}

// Value implements serializer interface
func (UnixSecondSerializer) Value(ctx context.Context, field *Field, dst reflect.Value, fieldValue interface{}) (result interface{}, err error) {
	rv := reflect.ValueOf(fieldValue)
	switch v := fieldValue.(type) {
	case int64, int, uint, uint64, int32, uint32, int16, uint16:
		result = time.Unix(reflect.Indirect(rv).Int(), 0).UTC()

			if afterParenthesis || expr.WithoutParentheses {
				if _, ok := expr.Vars[idx].(driver.Valuer); ok {
					builder.AddVar(builder, expr.Vars[idx])
				} else {
					switch rv := reflect.ValueOf(expr.Vars[idx]); rv.Kind() {
					case reflect.Slice, reflect.Array:
						if rv.Len() == 0 {
							builder.AddVar(builder, nil)
						} else {
							for i := 0; i < rv.Len(); i++ {
								if i > 0 {

							break
						}

						if _, isZero := pkField.ValueOf(db.Statement.Context, rv); isZero {
							db.AddError(pkField.Set(db.Statement.Context, rv, insertID))
							insertID += pkField.AutoIncrementIncrement
						}
					}
				}
			case reflect.Struct:
				_, isZero := pkField.ValueOf(db.Statement.Context, db.Statement.ReflectValue)
				if isZero {

	}
	return false
}

func AssertEqual(x, y interface{}) bool {
	if reflect.DeepEqual(x, y) {
		return true
	}
	if x == nil || y == nil {
		return false
	}

	xval := reflect.ValueOf(x)
	yval := reflect.ValueOf(y)
	if xval.Kind() == reflect.Ptr && xval.IsNil() ||
		yval.Kind() == reflect.Ptr && yval.IsNil() {
		return false
	}

	if valuer, ok := x.(driver.Valuer); ok {
		x, _ = valuer.Value()
	}

			}
		case driver.Valuer:
			reflectValue := reflect.ValueOf(v)
			if v != nil && reflectValue.IsValid() && ((reflectValue.Kind() == reflect.Ptr && !reflectValue.IsNil()) || reflectValue.Kind() != reflect.Ptr) {
				r, _ := v.Value()
				convertParams(r, idx)
			} else {
				vars[idx] = nullStr
			}
		case fmt.Stringer:
			reflectValue := reflect.ValueOf(v)
			switch reflectValue.Kind() {