DSRG.MKB
Class JoinConstraint
java.lang.Object
|
+--DSRG.MKB.JoinConstraint
- public class JoinConstraint
- extends java.lang.Object
- implements java.io.Serializable
- See Also:
- Serialized Form
Methods inherited from class java.lang.Object |
,
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
registerNatives,
wait,
wait,
wait |
myR1
private Relation myR1
myR2
private Relation myR2
myConditions
private java.util.Vector myConditions
joinSelectivity
private double joinSelectivity
JoinConstraint
public JoinConstraint(Relation R1,
Relation R2)
deleteJoinConstraint
public boolean deleteJoinConstraint()
Empty
public boolean Empty()
displayAll
public void displayAll()
toString
public java.lang.String toString()
- Overrides:
- toString in class java.lang.Object
addCondition
public boolean addCondition(Condition theCond)
addCondition
public boolean addCondition(Attribute A1,
Attribute A2,
java.lang.String Ext)
getR1
public Relation getR1()
getR2
public Relation getR2()
getConditions
public java.util.Vector getConditions()
setJoinSelectivity
public void setJoinSelectivity(double js)
getJoinSelectivity
public double getJoinSelectivity()