offline

type ExportOpt struct {
	DataTable    string
	EntityName   string
	FeatureNames []string
	Limit        *uint64
}

type ImportOpt struct {
	GroupName string
	Entity    *types.Entity
	Features  types.FeatureList
	Header    []string

	// CsvReader must not contain header
	CsvReader *csv.Reader
}

type JoinOpt struct {
	Entity         *types.Entity
	EntityRows     []types.EntityRow
	RevisionRanges []*types.RevisionRange
	Features       types.FeatureList
}

type Store interface {
	Join(ctx context.Context, opt JoinOpt) (map[string]dbutil.RowMap, error)
	Export(ctx context.Context, opt ExportOpt) (<-chan *types.RawFeatureValueRecord, error)
	Import(ctx context.Context, opt ImportOpt) (int64, string, error)

	TypeTag(dbType string) (string, error)
	io.Closer
}