Package org.apache.calcite.rel.metadata

Class RelColumnMapping

java.lang.Object

org.apache.calcite.rel.metadata.RelColumnMapping

public class RelColumnMapping
extends Object

Mapping from an input column of a RelNode to one of its output columns.

Field Summary

Fields

Modifier and Type	Field	Description
final boolean	derived	Whether the column mapping transforms the input.
final int	iInputColumn	0-based ordinal of mapped column within input rel.
final int	iInputRel	0-based ordinal of mapped input rel.
final int	iOutputColumn	0-based ordinal of mapped output column.

Constructor Summary

Constructors

Constructor	Description
RelColumnMapping(int iOutputColumn, int iInputRel, int iInputColumn, boolean derived)

Method Summary

Methods inherited from class java.lang.Object

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

Field Details

iOutputColumn

public final int iOutputColumn

0-based ordinal of mapped output column.

iInputRel

public final int iInputRel

0-based ordinal of mapped input rel.

iInputColumn

public final int iInputColumn

0-based ordinal of mapped column within input rel.

derived

public final boolean derived

Whether the column mapping transforms the input.

Constructor Details

RelColumnMapping

public RelColumnMapping(int iOutputColumn,
 int iInputRel,
 int iInputColumn,
 boolean derived)