org.eigenbase.rex
Class RexSlot

java.lang.Object
  org.eigenbase.rex.RexNode
      org.eigenbase.rex.RexVariable
          org.eigenbase.rex.RexSlot

Direct Known Subclasses:

RexInputRef, RexLocalRef

public abstract class RexSlot
extends RexVariable

Abstract base class for RexInputRef and RexLocalRef.

Since:

Oct 25, 2005

Version:

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

Author:

jhyde

Field Summary

protected int

index

Fields inherited from class org.eigenbase.rex.RexVariable

name, type

Fields inherited from class org.eigenbase.rex.RexNode

digest, EMPTY_ARRAY

Constructor Summary

protected

RexSlot(String name, int index, RelDataType type) Creates a slot.

Method Summary

int	getIndex()
protected static String[]	makeArray(int length, String prefix)

Methods inherited from class org.eigenbase.rex.RexVariable

getName, getType

Methods inherited from class org.eigenbase.rex.RexNode

accept, clone, getKind, isA, isAlwaysTrue, toString

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

index

protected final int index

Constructor Detail

RexSlot

protected RexSlot(String name,
                  int index,
                  RelDataType type)

Creates a slot.

Parameters:

index - Index of the field in the underlying rowtype

type - Type of the column

"Precondition:"

type != null, index >= 0

Method Detail

getIndex

public int getIndex()

makeArray

protected static String[] makeArray(int length,
                                    String prefix)