vishnu.model.algebra.algorithms.join
Class IndexNestedLoopJoinAlgorithm

java.lang.Object
  vishnu.model.algebra.algorithms.join.AbstractJoinAlgorithm
      vishnu.model.algebra.algorithms.join.IndexNestedLoopJoinAlgorithm

All Implemented Interfaces:

Algorithm, BinaryAlgorithm

public class IndexNestedLoopJoinAlgorithm
extends AbstractJoinAlgorithm
implements BinaryAlgorithm

Debe ser del tipo atr1=v1 AND atr2=v2 AND atr3=v3 ...

Author:

Mariano Tepper

Field Summary

Fields inherited from class vishnu.model.algebra.algorithms.join.AbstractJoinAlgorithm

canceled, conditions, l

Constructor Summary

IndexNestedLoopJoinAlgorithm()

Method Summary

boolean	canBePerformed() Indica si el algoritmo puede ser ejecutado sobre la relacion definida.
void	cancel() Cancela la ejecucion del algoritmo.
Algorithm	clone() Clona el algoritmo.
boolean	equals(java.lang.Object o)
int	hashCode()
void	perform(Relation.Context c) Ejecuta el algoritmo con el contexto dado
protected void	performProduct(TableContext left, Index right, Table destTable, Session s) Resuelve la junta
protected void	performProduct(TableContext left, TableContext right, Table destTable, Session s)
void	rightTable(TableContext c) Setea la tabla derecha del algoritmo.
java.lang.String	toString()
boolean	wasCanceled()

Methods inherited from class vishnu.model.algebra.algorithms.join.AbstractJoinAlgorithm

attach, isCanceled, leftTable

Methods inherited from class java.lang.Object

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

Methods inherited from interface vishnu.model.algebra.algorithms.BinaryAlgorithm

leftTable

Methods inherited from interface vishnu.model.algebra.algorithms.Algorithm

attach, isCanceled

Constructor Detail

IndexNestedLoopJoinAlgorithm

public IndexNestedLoopJoinAlgorithm()

Method Detail

perform

public void perform(Relation.Context c)

Description copied from interface: Algorithm

Ejecuta el algoritmo con el contexto dado

Specified by:

perform in interface Algorithm

Overrides:

perform in class AbstractJoinAlgorithm

Parameters:

c - - el contexto de ejecucion.

performProduct

protected void performProduct(TableContext left,
                              Index right,
                              Table destTable,
                              Session s)

Resuelve la junta

performProduct

protected void performProduct(TableContext left,
                              TableContext right,
                              Table destTable,
                              Session s)

Specified by:

performProduct in class AbstractJoinAlgorithm

rightTable

public void rightTable(TableContext c)

Description copied from interface: BinaryAlgorithm

Setea la tabla derecha del algoritmo.

Specified by:

rightTable in interface BinaryAlgorithm

Overrides:

rightTable in class AbstractJoinAlgorithm

cancel

public void cancel()

Description copied from interface: Algorithm

Cancela la ejecucion del algoritmo.

Specified by:

cancel in interface Algorithm

Overrides:

cancel in class AbstractJoinAlgorithm

wasCanceled

public boolean wasCanceled()

canBePerformed

public boolean canBePerformed()

Description copied from interface: Algorithm

Indica si el algoritmo puede ser ejecutado sobre la relacion definida.

Specified by:

canBePerformed in interface Algorithm

Specified by:

canBePerformed in class AbstractJoinAlgorithm

Returns:

true si puede ser ejecutado, false si no.

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

clone

public Algorithm clone()

Description copied from interface: Algorithm

Clona el algoritmo.

Specified by:

clone in interface Algorithm

Specified by:

clone in class AbstractJoinAlgorithm