if db.Statement.Schema != nil {
		for idx, name := range columns {
			if field := db.Statement.Schema.LookUpField(name); field != nil {
				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 {

		if err != nil {
			return nil, err
		}
		keys = append(keys, key)
	}
	return keys, nil
}

// CreateMetadata encodes the sealed object key into the metadata and returns
// the modified metadata. If the keyID and the kmsKey is not empty it encodes
// both into the metadata as well. It allocates a new metadata map if metadata
// is nil.

func (b *Batch[I]) Add(item I) error {
	b.Lock()
	defer b.Unlock()

	if b.isFull() {
		if b.store == nil {
			return ErrBatchFull
		}
		// commit batch to store
		if err := b.commit(); err != nil {
			return err
		}
	}

	b.items = append(b.items, item)
	return nil
}

// Len returns the no of items in the batch
func (b *Batch[_]) Len() int {
	b.Lock()
	defer b.Unlock()

		endpoint, err := NewEndpoint(poolsLayout[0].layout[0][0])
		if err != nil {
			return nil, setupType, err
		}
		if err := endpoint.UpdateIsLocal(); err != nil {
			return nil, setupType, err
		}
		if endpoint.Type() != PathEndpointType {
			return nil, setupType, config.ErrInvalidEndpoint(nil).Msg("use path style endpoint for single node setup")
		}

		endpoint.SetPoolIndex(0)

	if err := e.EncodeToken(start); err != nil {
		return err
	}

	switch {
	case !f.And.isEmpty():
		if err := e.EncodeElement(f.And, xml.StartElement{Name: xml.Name{Local: "And"}}); err != nil {
			return err
		}
	case !f.Tag.IsEmpty():
		if err := e.EncodeElement(f.Tag, xml.StartElement{Name: xml.Name{Local: "Tag"}}); err != nil {
			return err
		}
	default:

func loadClusterUsageObjectMetrics(ctx context.Context, m MetricValues, c *metricsCache) error {
	dataUsageInfo, err := c.dataUsageInfo.Get()
	if err != nil {
		metricsLogIf(ctx, err)
		return nil
	}

	// data usage has not captured any data yet.
	if dataUsageInfo.LastUpdate.IsZero() {
		return nil
	}

	var (
		clusterSize               uint64
		clusterBuckets            uint64
		clusterObjectsCount       uint64

			results:   []string{"c5", "c1", "c2", "c3", "c4"},
		},
	}

	for idx, data := range datas {
		db, err := gorm.Open(nil, nil)
		if err != nil {
			t.Fatal(err)
		}
		callbacks := db.Callback()

		for _, c := range data.callbacks {
			var v interface{} = callbacks.Create()

	fsDirs, err := getRandomDisks(nDisks)
	if err != nil {
		return nil, nil, err
	}

	pools := mustGetPoolEndpoints(0, fsDirs[:16]...)
	pools = append(pools, mustGetPoolEndpoints(1, fsDirs[16:]...)...)

	// Everything is fine, should return nil
	objLayer, err := newErasureServerPools(context.Background(), pools)
	if err != nil {
		return nil, nil, err
	}
	return objLayer, fsDirs, nil
}

func TestPoolMetaValidate(t *testing.T) {

		permDir := path.Join(os.TempDir(), "perm-dir")
		if err := os.MkdirAll(permDir, os.FileMode(0o200)); err != nil {
			t.Fatal(err)
		}
		defer os.RemoveAll(permDir)

		// Check if permission denied.
		if _, err := readDir(permDir); err == nil {
			t.Fatalf("expected = an error, got: nil")
		}
	}
}

// Represents data type for all the test results.
type result struct {
	dir     string

	if err = config.CheckValidKeys(config.APISubSys, kvs, DefaultKVS, deprecatedKeys...); err != nil {
		return cfg, err
	}

	// Check environment variables parameters
	requestsMax, err := strconv.Atoi(env.Get(EnvAPIRequestsMax, kvs.GetWithDefault(apiRequestsMax, DefaultKVS)))
	if err != nil {
		return cfg, err
	}

	cfg.RequestsMax = requestsMax
	if requestsMax < 0 {