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Class DSRG.MKB.JoinConstraint
java.lang.Object
|
+----DSRG.MKB.JoinConstraint
- public class JoinConstraint
- extends Object
- implements Serializable
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joinSelectivity
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myConditions
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myR1
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myR2
-
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JoinConstraint(Relation, Relation)
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addCondition(Attribute, Attribute, String)
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addCondition(Condition)
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deleteJoinConstraint()
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displayAll()
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Empty()
-
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getConditions()
-
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getJoinSelectivity()
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getR1()
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getR2()
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setJoinSelectivity(double)
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toString()
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myR1
private Relation myR1
myR2
private Relation myR2
myConditions
private 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 String toString()
- Overrides:
- toString in class Object
addCondition
public boolean addCondition(Condition theCond)
addCondition
public boolean addCondition(Attribute A1,
Attribute A2,
String Ext)
getR1
public Relation getR1()
getR2
public Relation getR2()
getConditions
public Vector getConditions()
setJoinSelectivity
public void setJoinSelectivity(double js)
getJoinSelectivity
public double getJoinSelectivity()
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