evql

package

v0.1.0-beta9 Latest Latest Go to latest Published: Aug 1, 2019 License: MIT Imports: 15 Imported by: 0

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func AggregateData(s evdb.DataPoints, agg Aggregator) float64

type Aggregator interface {
	Aggregate(acc, v float64) float64
	Reset()
	Zero() float64
}

Aggregator aggregates values

func BlankAggregator(agg Aggregator) Aggregator

BlankAggregator returns a separate Aggregator instance

func NewAggregator(name string) Aggregator

NewAggregator creates a new Aggregator

type Execer interface {
	Exec(ctx context.Context, t db.TimeRange, q string) ([]db.Results, error)
}

Execer executes evql queries

func NewExecer(scanner db.Scanner) Execer

NewExecer turns a Scanner to an Execer

type Query struct {
	// contains filtered or unexported fields
}

func Parse(query string) (*Query, error)

func (q *Query) Eval(out []db.Results, t db.TimeRange, results db.Results) []db.Results

Eval executes the query against some results

func (q *Query) Queries(t db.TimeRange) []db.ScanQuery