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Mimir query engine: add support for
count_over_time, `present_over_…
…time` and `last_over_time` (#8925) * Add `count_over_time` function * Add feature toggle for functions * Add `present_over_time` function * Add `last_over_time` function * Add changelog entry * Update CLI flag description and enable by default
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| // SPDX-License-Identifier: AGPL-3.0-only | ||
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| package functions | ||
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| import ( | ||
| "github.com/prometheus/prometheus/model/histogram" | ||
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| "github.com/grafana/mimir/pkg/streamingpromql/types" | ||
| ) | ||
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| var CountOverTime = FunctionOverRangeVector{ | ||
| SeriesMetadataFunc: DropSeriesName, | ||
| StepFunc: countOverTime, | ||
| } | ||
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| func countOverTime(step types.RangeVectorStepData, _ float64, fPoints *types.FPointRingBuffer, hPoints *types.HPointRingBuffer, _ EmitAnnotationFunc) (f float64, hasFloat bool, h *histogram.FloatHistogram, err error) { | ||
| fPointCount := fPoints.CountAtOrBefore(step.RangeEnd) | ||
| hPointCount := hPoints.CountAtOrBefore(step.RangeEnd) | ||
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| if fPointCount == 0 && hPointCount == 0 { | ||
| return 0, false, nil, nil | ||
| } | ||
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| return float64(fPointCount + hPointCount), true, nil, nil | ||
| } | ||
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| var LastOverTime = FunctionOverRangeVector{ | ||
| SeriesMetadataFunc: PassthroughSeriesMetadata, | ||
| StepFunc: lastOverTime, | ||
| } | ||
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| func lastOverTime(step types.RangeVectorStepData, _ float64, fPoints *types.FPointRingBuffer, hPoints *types.HPointRingBuffer, _ EmitAnnotationFunc) (f float64, hasFloat bool, h *histogram.FloatHistogram, err error) { | ||
| lastFloat, floatAvailable := fPoints.LastAtOrBefore(step.RangeEnd) | ||
| lastHistogram, histogramAvailable := hPoints.LastAtOrBefore(step.RangeEnd) | ||
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| if !floatAvailable && !histogramAvailable { | ||
| return 0, false, nil, nil | ||
| } | ||
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| if floatAvailable && (!histogramAvailable || lastFloat.T > lastHistogram.T) { | ||
| return lastFloat.F, true, nil, nil | ||
| } | ||
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| // We must make a copy of the histogram before returning it, as the ring buffer may reuse the FloatHistogram instance on subsequent steps. | ||
| return 0, false, lastHistogram.H.Copy(), nil | ||
| } | ||
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| var PresentOverTime = FunctionOverRangeVector{ | ||
| SeriesMetadataFunc: DropSeriesName, | ||
| StepFunc: presentOverTime, | ||
| } | ||
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| func presentOverTime(step types.RangeVectorStepData, _ float64, fPoints *types.FPointRingBuffer, hPoints *types.HPointRingBuffer, _ EmitAnnotationFunc) (f float64, hasFloat bool, h *histogram.FloatHistogram, err error) { | ||
| if fPoints.AnyAtOrBefore(step.RangeEnd) || hPoints.AnyAtOrBefore(step.RangeEnd) { | ||
| return 1, true, nil, nil | ||
| } | ||
|
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| return 0, false, nil, nil | ||
| } |
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