vishnu.model.algebra.algorithms.join
Class SortMergeJoinAlgorithm

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

All Implemented Interfaces:

Algorithm, BinaryAlgorithm

public class SortMergeJoinAlgorithm
extends AbstractJoinAlgorithm

Debe ser del tipo tabla1.atrA = tabla2.atrB

Author:

Mariano Tepper

Field Summary

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

canceled, conditions, l, r

Constructor Summary

SortMergeJoinAlgorithm()

Method Summary

boolean	canBePerformed() Indica si el algoritmo puede ser ejecutado sobre la relacion definida.
Algorithm	clone() Clona el algoritmo.
boolean	equals(java.lang.Object o)
int	hashCode()
protected void	performProduct(TableContext left, TableContext right, Table destTable, Session session) Resuelve la junta
java.lang.String	toString()

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

attach, cancel, isCanceled, leftTable, perform, rightTable

Methods inherited from class java.lang.Object

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

Constructor Detail

SortMergeJoinAlgorithm

public SortMergeJoinAlgorithm()

Method Detail

performProduct

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

Resuelve la junta

Specified by:

performProduct in class AbstractJoinAlgorithm

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

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode 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