org.eigenbase.rel
Class AggregateCall

java.lang.Object
  org.eigenbase.rel.AggregateCall

public class AggregateCall
extends Object

Call to an aggregation function within an AggregateRel.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/rel/AggregateCall.java#7 $

Author:

jhyde

Field Summary

private Aggregation	aggregation
private List<Integer>	argList
int[]	args Deprecated. todo: change all public uses to use getArgList(), then make private
private boolean	distinct
private String	name
private RelDataType	type

Constructor Summary

AggregateCall(Aggregation aggregation, boolean distinct, List<Integer> argList, RelDataType type, String name)
Creates an AggregateCall.

Method Summary

AggregateRelBase.AggCallBinding	createBinding(AggregateRelBase aggregateRelBase) Creates a binding of this call in the context of an AggregateRel, which can then be used to infer the return type.
boolean	equals(Object o)
Aggregation	getAggregation() Returns the Aggregation.
List<Integer>	getArgList() Returns the ordinals of the arguments to this call.
String	getName() Returns the name.
RelDataType	getType() Returns the result type.
int	hashCode()
boolean	isDistinct() Returns whether this AggregateCall is distinct, as in COUNT(DISTINCT empno).
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

aggregation

private final Aggregation aggregation

args

public final int[] args

Deprecated. todo: change all public uses to use getArgList(), then make private

TODO jvs 24-Apr-2006: make this array and its contents immutable

distinct

private final boolean distinct

type

private final RelDataType type

name

private final String name

argList

private final List<Integer> argList

Constructor Detail

AggregateCall

public AggregateCall(Aggregation aggregation,
                     boolean distinct,
                     List<Integer> argList,
                     RelDataType type,
                     String name)

Creates an AggregateCall.

Parameters:

aggregation - Aggregation

distinct - Whether distinct

argList - List of ordinals of arguments

type - Result type

name - Name

Method Detail

isDistinct

public final boolean isDistinct()

Returns whether this AggregateCall is distinct, as in COUNT(DISTINCT empno).

Returns:

whether distinct

getAggregation

public final Aggregation getAggregation()

Returns the Aggregation.

Returns:

aggregation

getArgList

public final List<Integer> getArgList()

Returns the ordinals of the arguments to this call.

The list is immutable.

Returns:

list of argument ordinals

getType

public final RelDataType getType()

Returns the result type.

Returns:

result type

getName

public String getName()

Returns the name.

Returns:

name

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

createBinding

public AggregateRelBase.AggCallBinding createBinding(AggregateRelBase aggregateRelBase)

Creates a binding of this call in the context of an AggregateRel, which can then be used to infer the return type.