storage

type Scanners ¶

type Scanners interface {
	Close() error
	NewVectorSelector(ctx context.Context, opts *query.Options, hints storage.SelectHints, selector logicalplan.VectorSelector) (model.VectorOperator, error)
	NewMatrixSelector(ctx context.Context, opts *query.Options, hints storage.SelectHints, selector logicalplan.MatrixSelector, call logicalplan.FunctionCall) (model.VectorOperator, error)

	// SeriesCounter returns the querier's count-pushdown capability, or nil if unsupported.
	SeriesCounter() SeriesCounter
}

type SeriesCounter ¶ added in v0.6.0

type SeriesCounter interface {
	CountSeries(ctx context.Context, startMs, endMs int64, matchers ...*labels.Matcher) (uint64, error)
}

SeriesCounter is the optional count-pushdown capability a Scanners implementation exposes from its underlying querier: it returns the number of series matching matchers with at least one sample in [startMs, endMs] (Prometheus milliseconds), without materializing samples or labels. It backs the PromQL `count(<selector>)` fast path. A Scanners whose querier does not support it returns nil from SeriesCounter and the plan falls back to the aggregate-over-Select path.