org.eigenbase.rex
Class RexWindow

java.lang.Object
  org.eigenbase.rex.RexWindow

public class RexWindow
extends Object

Specification of the window of rows over which a RexOver windowed aggregate is evaluated.

Treat it as immutable!

Since:

Dec 6, 2004

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rex/RexWindow.java#7 $

Author:

jhyde

Field Summary

private String	digest
private SqlNode	lowerBound
RexNode[]	orderKeys
RexNode[]	partitionKeys
private boolean	physical
private SqlNode	upperBound

Constructor Summary

RexWindow(RexNode[] partitionKeys, RexNode[] orderKeys, SqlNode lowerBound, SqlNode upperBound, boolean physical)
Creates a window.

Method Summary

private String	computeDigest()
boolean	equals(Object that)
SqlNode	getLowerBound()
SqlNode	getUpperBound()
int	hashCode()
boolean	isRows()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

partitionKeys

public final RexNode[] partitionKeys

orderKeys

public final RexNode[] orderKeys

lowerBound

private final SqlNode lowerBound

upperBound

private final SqlNode upperBound

physical

private final boolean physical

digest

private final String digest

Constructor Detail

RexWindow

RexWindow(RexNode[] partitionKeys,
          RexNode[] orderKeys,
          SqlNode lowerBound,
          SqlNode upperBound,
          boolean physical)

Creates a window.

If you need to create a window from outside this package, use RexBuilder.makeOver(org.eigenbase.reltype.RelDataType, org.eigenbase.sql.SqlAggFunction, org.eigenbase.rex.RexNode[], org.eigenbase.rex.RexNode[], org.eigenbase.rex.RexNode[], org.eigenbase.sql.SqlNode, org.eigenbase.sql.SqlNode, boolean, boolean, boolean).

Method Detail

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object that)

Overrides:

equals in class Object

computeDigest

private String computeDigest()

getLowerBound

public SqlNode getLowerBound()

getUpperBound

public SqlNode getUpperBound()

isRows

public boolean isRows()