de.fuberlin.wiwiss.d2rq.expr

Class NotNull

java.lang.Object

de.fuberlin.wiwiss.d2rq.expr.Expression

de.fuberlin.wiwiss.d2rq.expr.NotNull

public class NotNull
extends Expression

Field Summary

Fields inherited from class de.fuberlin.wiwiss.d2rq.expr.Expression

FALSE, TRUE

Method Summary

Methods

Modifier and Type	Method and Description
Set<Attribute>	attributes()
static Expression	create(Expression expr)
boolean	equals(Object other)
int	hashCode()
boolean	isFalse()
boolean	isTrue()
Expression	renameAttributes(ColumnRenamer columnRenamer)
String	toSQL(ConnectedDB database, AliasMap aliases)
String	toString()

Methods inherited from class de.fuberlin.wiwiss.d2rq.expr.Expression

and, or

Methods inherited from class java.lang.Object

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

Method Detail

create

public static Expression create(Expression expr)

attributes

public Set<Attribute> attributes()

Specified by:

attributes in class Expression

isFalse

public boolean isFalse()

Specified by:

isFalse in class Expression

isTrue

public boolean isTrue()

Specified by:

isTrue in class Expression

renameAttributes

public Expression renameAttributes(ColumnRenamer columnRenamer)

Specified by:

renameAttributes in class Expression

toSQL

public String toSQL(ConnectedDB database,
           AliasMap aliases)

Specified by:

toSQL in class Expression

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object