org.eigenbase.rex
Class RexDynamicParam

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

public class RexDynamicParam
extends RexVariable

Dynamic parameter reference in a row-expression.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rex/RexDynamicParam.java#13 $

Author:

John V. Sichi

Field Summary

private 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

RexDynamicParam(RelDataType type, int index)
Creates a dynamic parameter.

Method Summary

<R> R	accept(RexVisitor<R> visitor) Accepts a visitor, dispatching to the right overloaded visitXxx method.
RexDynamicParam	clone()
int	getIndex()
RexKind	getKind() Returns the kind of node this is.

Methods inherited from class org.eigenbase.rex.RexVariable

getName, getType

Methods inherited from class org.eigenbase.rex.RexNode

isA, isAlwaysTrue, toString

Methods inherited from class java.lang.Object

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

Field Detail

index

private final int index

Constructor Detail

RexDynamicParam

public RexDynamicParam(RelDataType type,
                       int index)

Creates a dynamic parameter.

Parameters:

type - inferred type of parameter

index - 0-based index of dynamic parameter in statement

Method Detail

clone

public RexDynamicParam clone()

Specified by:

clone in class RexNode

getKind

public RexKind getKind()

Description copied from class: RexNode

Returns the kind of node this is.

Overrides:

getKind in class RexNode

Returns:

A RexKind value, never null

getIndex

public int getIndex()

accept

public <R> R accept(RexVisitor<R> visitor)

Description copied from class: RexNode

Accepts a visitor, dispatching to the right overloaded visitXxx method.

Also see RexProgram.apply(RexVisitor, RexNode[], RexNode), which applies a visitor to several expressions simultaneously.

Specified by:

accept in class RexNode