dao

type Dao interface {
	// list all ServiceNames
	ServiceNames(ctx context.Context) ([]string, error)
	// list OperationName for specifically service
	OperationNames(ctx context.Context, serviceName string) ([]string, error)
	// QuerySpan by family title and sel
	QuerySpanList(ctx context.Context, serviceName, operationName string, sel *Selector, order string) ([]model.SpanListRef, error)
	// Trace get trace by trace id span sort by start_time
	Trace(ctx context.Context, traceID uint64, spanIDs ...uint64) ([]*model.Span, error)
	// PeerService query all peer service depend by service
	PeerService(ctx context.Context, serviceName string) ([]string, error)
	// Ping pong
	Ping(ctx context.Context) error
	// Close dao
	Close(ctx context.Context) error
	// SupportOrder checkou order support
	SupportOrder(order string) bool
	// MeanOperationNameField
	MeanOperationNameField(ctx context.Context, whereMap map[string]string, field string, start, end int64, groupby []string) ([]model.MeanOperationNameValue, error)
	// SpanSeriesMean
	SpanSeriesMean(ctx context.Context, serviceName, operationName string, fields []string, start, end, interval int64) (*model.Series, error)
	// SpanSeriesCount
	SpanSeriesCount(ctx context.Context, serviceName, operationName string, fields []string, start, end, interval int64) (*model.Series, error)
}

type Selector struct {
	Start     int64
	End       int64
	Limit     int
	Offset    int
	OnlyError bool
}