aggregation

package
v0.10.1 Latest Latest
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 Go to latest Published: Apr 1, 2026 License: Apache-2.0 Imports: 3 Imported by: 0

Documentation

Overview

Package aggregation implements aggregation functions to statistic a range of values.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func FromFieldValue added in v0.3.0 

func FromFieldValue[N Number](fieldValue *modelv1.FieldValue) (N, error)

FromFieldValue transforms modelv1.FieldValue to Number.

func PartialToFieldValues added in v0.10.0 

func PartialToFieldValues[N Number](af modelv1.AggregationFunction, p Partial[N]) ([]*modelv1.FieldValue, error)

PartialToFieldValues converts a Partial to field values for wire transport. For MEAN it returns two values (Value/sum first, Count second); for others one value.

func ToFieldValue added in v0.3.0 

func ToFieldValue[N Number](value N) (*modelv1.FieldValue, error)

ToFieldValue transforms Number to modelv1.FieldValue.

Types

type Map added in v0.10.0 

type Map[N Number] interface {
	In(N)
	Val() N
	Partial() Partial[N]
	Reset()
}

Map accumulates raw values and produces aggregation results. It serves as the local accumulator for raw data points.

func NewMap added in v0.10.0 

func NewMap[N Number](af modelv1.AggregationFunction) (Map[N], error)

NewMap returns a Map aggregation function for the given type.

type Number added in v0.3.0 

type Number interface {
	~int64 | ~float64
}

Number denotes the supported number types.

type Partial added in v0.10.0 

type Partial[N Number] struct {
	Value N
	Count N
}

Partial represents the intermediate result of a Map phase. For most functions only Value is meaningful; for MEAN both Value (sum) and Count are used.

func FieldValuesToPartial added in v0.10.0 

func FieldValuesToPartial[N Number](af modelv1.AggregationFunction, fvs []*modelv1.FieldValue) (Partial[N], error)

FieldValuesToPartial converts field values from wire transport to a Partial. For MEAN expects two values (sum, count); for others one value (Count will be zero).

type Reduce added in v0.10.0 

type Reduce[N Number] interface {
	Combine(Partial[N])
	Val() N
	Reset()
}

Reduce combines intermediate results from Map phases into a final value.

func NewReduce added in v0.10.0 

func NewReduce[N Number](af modelv1.AggregationFunction) (Reduce[N], error)

NewReduce returns a Reduce aggregation function for the given type.

Source Files

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