org.eigenbase.relopt.volcano
Class VolcanoPlannerTraitTest.AltTraitConverterRule

java.lang.Object
  org.eigenbase.relopt.RelOptRule
      org.eigenbase.rel.convert.ConverterRule
          org.eigenbase.relopt.volcano.VolcanoPlannerTraitTest.AltTraitConverterRule

Enclosing class:

VolcanoPlannerTraitTest

private static class VolcanoPlannerTraitTest.AltTraitConverterRule
extends ConverterRule

Field Summary

private RelTrait

toTrait

Fields inherited from class org.eigenbase.relopt.RelOptRule

ANY, description, operands

Constructor Summary

private

VolcanoPlannerTraitTest.AltTraitConverterRule(VolcanoPlannerTraitTest.AltTrait fromTrait, VolcanoPlannerTraitTest.AltTrait toTrait, String description)

Method Summary

RelNode	convert(RelNode rel)
boolean	isGuaranteed() Returns true if this rule can convert any relational expression of the input convention.

Methods inherited from class org.eigenbase.rel.convert.ConverterRule

getInTrait, getOutConvention, getOutTrait, getTraitDef, onMatch

Methods inherited from class org.eigenbase.relopt.RelOptRule

convert, equals, equals, getOperand, getOperands, hashCode, matches, mergeTraitsAndConvert, mergeTraitsAndConvert, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

toTrait

private final RelTrait toTrait

Constructor Detail

VolcanoPlannerTraitTest.AltTraitConverterRule

private VolcanoPlannerTraitTest.AltTraitConverterRule(VolcanoPlannerTraitTest.AltTrait fromTrait,
                                                      VolcanoPlannerTraitTest.AltTrait toTrait,
                                                      String description)

Method Detail

convert

public RelNode convert(RelNode rel)

Specified by:

convert in class ConverterRule

isGuaranteed

public boolean isGuaranteed()

Description copied from class: ConverterRule

Returns true if this rule can convert any relational expression of the input convention.

The union-to-java converter, for example, is not guaranteed, because it only works on unions.

Overrides:

isGuaranteed in class ConverterRule