Function createLabelValuesRequest

pkg/querier/blocks_store_queryable.go:1141–1169

(minT, maxT, limit int64, label string, blockIDs []ulid.ULID, matchers ...*labels.Matcher)

}

func createLabelValuesRequest(minT, maxT, limit int64, label string, blockIDs []ulid.ULID, matchers ...*labels.Matcher) (*storepb.LabelValuesRequest, error) {
	req := &storepb.LabelValuesRequest{
		Start:    minT,
		End:      maxT,
		Limit:    limit,
		Label:    label,
		Matchers: convertMatchersToLabelMatcher(matchers),
	}

	// Selectively query only specific blocks.
	hints := &hintspb.LabelValuesRequestHints{
		BlockMatchers: []storepb.LabelMatcher{
			{
				Type:  storepb.LabelMatcher_RE,
				Name:  block.BlockIDLabel,
				Value: strings.Join(convertULIDsToString(blockIDs), "|"),
			},
		},
	}

	anyHints, err := types.MarshalAny(hints)
	if err != nil {
		return nil, errors.Wrapf(err, "failed to marshal label values request hints")
	}

	req.Hints = anyHints

	return req, nil
}

func convertULIDsToString(ids []ulid.ULID) []string {
	res := make([]string, len(ids))