vishnu.model.algebra.optimizer.costs
Class AbstractCostEstimator

java.lang.Object
  vishnu.model.algebra.optimizer.costs.AbstractCostEstimator

All Implemented Interfaces:

CostEstimator

Direct Known Subclasses:

HashIndexEqualtySelectionCostEstimator, NoIndexSortedDataSelectionCostEstimator, ScanSelectionCostEstimator

public abstract class AbstractCostEstimator
extends java.lang.Object
implements CostEstimator

Constructor Summary

AbstractCostEstimator()

Method Summary

int	cost()
Database	getDatabase()
Relation	getRelation()
int	image(int column)
int	innerImage(java.lang.String attribute)
protected int	innerPages()
abstract int	inputCost()
int	log2(int v)
int	max(int a, int b)
abstract int	outputCost()
void	setDatabase(Database database)
void	setRelation(Relation relation)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCostEstimator

public AbstractCostEstimator()

Method Detail

getDatabase

public Database getDatabase()

setDatabase

public void setDatabase(Database database)

Specified by:

setDatabase in interface CostEstimator

getRelation

public Relation getRelation()

setRelation

public void setRelation(Relation relation)

Specified by:

setRelation in interface CostEstimator

cost

public int cost()

Specified by:

cost in interface CostEstimator

innerImage

public int innerImage(java.lang.String attribute)

max

public int max(int a,
               int b)

innerPages

protected int innerPages()

image

public int image(int column)

log2

public int log2(int v)

inputCost

public abstract int inputCost()

outputCost

public abstract int outputCost()