Package tools.refinery.interpreter.matchers.planning.helpers

Class StatisticsHelper

java.lang.Object

tools.refinery.interpreter.matchers.planning.helpers.StatisticsHelper

public class StatisticsHelper
extends Object

Helpers dealing with optionally present statistics information

Since:

2.1

Method Summary

Modifier and Type	Method	Description
static Optional<Double>	estimateAverageBucketSize(TupleMask groupMask, Accuracy requiredAccuracy, BiFunction<TupleMask,Accuracy,Optional<Long>> estimateCardinality)
static Optional<Double>	min(Optional<Double> a, double b)
static Optional<Double>	min(Optional<Double> a, Optional<Double> b)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

estimateAverageBucketSize

public static Optional<Double> estimateAverageBucketSize(TupleMask groupMask,
 Accuracy requiredAccuracy,
 BiFunction<TupleMask,Accuracy,Optional<Long>> estimateCardinality)

min

public static Optional<Double> min(Optional<Double> a,
 Optional<Double> b)

min

public static Optional<Double> min(Optional<Double> a,
 double b)