vishnu.model.algebra.optimizer
Class SelectionForwardingTranslationStage

java.lang.Object
  vishnu.model.algebra.optimizer.AbstractTranslationStage
      vishnu.model.algebra.optimizer.ChildVisitorTranslationStage
          vishnu.model.algebra.optimizer.SelectionForwardingTranslationStage

All Implemented Interfaces:

TranslationStage, VisitorTranslationStage

public class SelectionForwardingTranslationStage
extends ChildVisitorTranslationStage

Author:

Hernan Rancati

Constructor Summary

SelectionForwardingTranslationStage()

Method Summary

protected java.util.Collection<SQLOperand>	exclusiveConditions(ConjunctiveSelection selection, Relation r, Database d)
protected boolean	isExclusiveCondition(SQLOperand o, TableSignature s)
java.util.Collection<SQLOperand>	remainingConditions(java.util.Collection<SQLOperand> total, java.util.Collection<SQLOperand> left, java.util.Collection<SQLOperand> right)
Relation	visit(Relation r, UserContext uc)

Methods inherited from class vishnu.model.algebra.optimizer.ChildVisitorTranslationStage

perform

Methods inherited from class vishnu.model.algebra.optimizer.AbstractTranslationStage

attach

Methods inherited from class java.lang.Object

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

Constructor Detail

SelectionForwardingTranslationStage

public SelectionForwardingTranslationStage()

Method Detail

visit

public Relation visit(Relation r,
                      UserContext uc)

Specified by:

visit in interface VisitorTranslationStage

Specified by:

visit in class ChildVisitorTranslationStage

remainingConditions

public java.util.Collection<SQLOperand> remainingConditions(java.util.Collection<SQLOperand> total,
                                                            java.util.Collection<SQLOperand> left,
                                                            java.util.Collection<SQLOperand> right)

exclusiveConditions

protected java.util.Collection<SQLOperand> exclusiveConditions(ConjunctiveSelection selection,
                                                               Relation r,
                                                               Database d)

isExclusiveCondition

protected boolean isExclusiveCondition(SQLOperand o,
                                       TableSignature s)