org.eigenbase.rel.metadata
Class RelColumnMapping

java.lang.Object
  org.eigenbase.rel.metadata.RelColumnMapping

public class RelColumnMapping
extends Object

RelColumnMapping records a mapping from an input column of a RelNode to one of its output columns.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rel/metadata/RelColumnMapping.java#5 $

Author:

John V. Sichi

Field Summary

int	iInputColumn 0-based ordinal of mapped column within input rel.
int	iInputRel 0-based ordinal of mapped input rel.
int	iOutputColumn 0-based ordinal of mapped output column.
boolean	isDerived Whether the column mapping transforms the input.

Constructor Summary

RelColumnMapping()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

iOutputColumn

public int iOutputColumn

0-based ordinal of mapped output column.

iInputRel

public int iInputRel

0-based ordinal of mapped input rel.

iInputColumn

public int iInputColumn

0-based ordinal of mapped column within input rel.

isDerived

public boolean isDerived

Whether the column mapping transforms the input.

Constructor Detail

RelColumnMapping

public RelColumnMapping()