com.metamatrix.query.optimizer.relational.rules
Class RuleRaiseNull

java.lang.Object
  com.metamatrix.query.optimizer.relational.rules.RuleRaiseNull

All Implemented Interfaces:

OptimizerRule

public final class RuleRaiseNull
extends java.lang.Object
implements OptimizerRule

Will attempt to raise null nodes to their highest points

Constructor Summary

RuleRaiseNull()

Method Summary

PlanNode	execute(PlanNode plan, QueryMetadataInterface metadata, CapabilitiesFinder capFinder, RuleStack rules, AnalysisRecord analysisRecord, CommandContext context)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

RuleRaiseNull

public RuleRaiseNull()

Method Detail

execute

public PlanNode execute(PlanNode plan,
                        QueryMetadataInterface metadata,
                        CapabilitiesFinder capFinder,
                        RuleStack rules,
                        AnalysisRecord analysisRecord,
                        CommandContext context)
                 throws QueryPlannerException,
                        QueryMetadataException,
                        MetaMatrixComponentException

Specified by:

execute in interface OptimizerRule

Throws:

QueryPlannerException

QueryMetadataException

MetaMatrixComponentException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object