org.eigenbase.relopt.volcano
Class RuleQueue.RelImportanceComparator

java.lang.Object
  org.eigenbase.relopt.volcano.RuleQueue.RelImportanceComparator

All Implemented Interfaces:

Comparator<RelSubset>

Enclosing class:

RuleQueue

private class RuleQueue.RelImportanceComparator
extends Object
implements Comparator<RelSubset>

Compares RelNode objects according to their cached 'importance'.

Constructor Summary

private

RuleQueue.RelImportanceComparator()

Method Summary

int	compare(RelSubset rel1, RelSubset rel2)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

RuleQueue.RelImportanceComparator

private RuleQueue.RelImportanceComparator()

Method Detail

compare

public int compare(RelSubset rel1,
                   RelSubset rel2)

Specified by:

compare in interface Comparator<RelSubset>