org.eigenbase.relopt.volcano
Class VolcanoPlannerTraitTest.AltTraitDef

java.lang.Object
  org.eigenbase.relopt.RelTraitDef
      org.eigenbase.relopt.volcano.VolcanoPlannerTraitTest.AltTraitDef

Enclosing class:

VolcanoPlannerTraitTest

private static class VolcanoPlannerTraitTest.AltTraitDef
extends RelTraitDef

Field Summary

private MultiMap<RelTrait,Pair<RelTrait,ConverterRule>>

conversionMap

Constructor Summary

private

VolcanoPlannerTraitTest.AltTraitDef()

Method Summary

boolean	canConvert(RelOptPlanner planner, RelTrait fromTrait, RelTrait toTrait) Tests whether the given RelTrait can be converted to another RelTrait.
RelNode	convert(RelOptPlanner planner, RelNode rel, RelTrait toTrait, boolean allowInfiniteCostConverters) Converts the given RelNode to the given RelTrait.
String	getSimpleName()
Class	getTraitClass()
void	registerConverterRule(RelOptPlanner planner, ConverterRule converterRule) Provides notification of the registration of a particular ConverterRule with a RelOptPlanner.

Methods inherited from class org.eigenbase.relopt.RelTraitDef

canonize, deregisterConverterRule

Methods inherited from class java.lang.Object

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

Field Detail

conversionMap

private MultiMap<RelTrait,Pair<RelTrait,ConverterRule>> conversionMap

Constructor Detail

VolcanoPlannerTraitTest.AltTraitDef

private VolcanoPlannerTraitTest.AltTraitDef()

Method Detail

getTraitClass

public Class getTraitClass()

Specified by:

getTraitClass in class RelTraitDef

Returns:

the specific RelTrait type associated with this RelTraitDef.

getSimpleName

public String getSimpleName()

Specified by:

getSimpleName in class RelTraitDef

Returns:

a simple name for this RelTraitDef (for use in RelNode.explain(RelOptPlanWriter)).

convert

public RelNode convert(RelOptPlanner planner,
                       RelNode rel,
                       RelTrait toTrait,
                       boolean allowInfiniteCostConverters)

Description copied from class: RelTraitDef

Converts the given RelNode to the given RelTrait.

Specified by:

convert in class RelTraitDef

Parameters:

planner - the planner requesting the conversion

rel - RelNode to convert

toTrait - RelTrait to convert to

allowInfiniteCostConverters - flag indicating whether infinite cost converters are allowe

Returns:

a converted RelNode or null if conversion is not possible

canConvert

public boolean canConvert(RelOptPlanner planner,
                          RelTrait fromTrait,
                          RelTrait toTrait)

Description copied from class: RelTraitDef

Tests whether the given RelTrait can be converted to another RelTrait.

Specified by:

canConvert in class RelTraitDef

Parameters:

planner - the planner requesting the conversion test

fromTrait - the RelTrait to convert from

toTrait - the RelTrait to conver to

Returns:

true if fromTrait can be converted to toTrait

registerConverterRule

public void registerConverterRule(RelOptPlanner planner,
                                  ConverterRule converterRule)

Description copied from class: RelTraitDef

Provides notification of the registration of a particular ConverterRule with a RelOptPlanner. The default implementation does nothing.

Overrides:

registerConverterRule in class RelTraitDef

Parameters:

planner - the planner registering the rule

converterRule - the registered converter rule