org.apache.calcite.interpreter

Class AggregateNode.NumericComparison<T>

java.lang.Object

org.apache.calcite.interpreter.AggregateNode.NumericComparison<T>

Type Parameters:

T - The numeric type

Direct Known Subclasses:

AggregateNode.MaxDouble, AggregateNode.MaxFloat, AggregateNode.MaxInt, AggregateNode.MaxLong, AggregateNode.MinDouble, AggregateNode.MinFloat, AggregateNode.MinInt, AggregateNode.MinLong

Enclosing class:

AggregateNode

public static class AggregateNode.NumericComparison<T>
extends java.lang.Object

Common implementation of comparison aggregate methods over numeric values as a user-defined aggregate.

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.function.BiFunction<T,T,T>	comparisonFunction
private T	initialValue

Constructor Summary

Constructors

Constructor and Description
NumericComparison(T initialValue, java.util.function.BiFunction<T,T,T> comparisonFunction)

Method Summary

Modifier and Type	Method and Description
T	add(T accumulator, T value)
T	init()
T	merge(T accumulator0, T accumulator1)
T	result(T accumulator)

Methods inherited from class java.lang.Object

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

Field Detail

initialValue

private final T initialValue

comparisonFunction

private final java.util.function.BiFunction<T,T,T> comparisonFunction

Constructor Detail

NumericComparison

public NumericComparison(T initialValue,
                         java.util.function.BiFunction<T,T,T> comparisonFunction)

Method Detail

init

public T init()

add

public T add(T accumulator,
             T value)

merge

public T merge(T accumulator0,
               T accumulator1)

result

public T result(T accumulator)