com.yahoo.bullet.query.aggregations

Class CountDistinct

java.lang.Object

com.yahoo.bullet.query.aggregations.Aggregation

com.yahoo.bullet.query.aggregations.CountDistinct

All Implemented Interfaces:

Configurable, Serializable

public class CountDistinct
extends Aggregation

See Also:

Serialized Form

Field Summary

Fields inherited from class com.yahoo.bullet.query.aggregations.Aggregation

size, type

Constructor Summary

Constructors

Constructor and Description
CountDistinct(List<String> fields, String name) Constructor that creates a COUNT_DISTINCT aggregation.

Method Summary

Modifier and Type	Method and Description
Strategy	getStrategy(BulletConfig config) Returns a new Strategy instance that handles this aggregation.
String	toString()

Methods inherited from class com.yahoo.bullet.query.aggregations.Aggregation

configure, getFields

Methods inherited from class java.lang.Object

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

Constructor Detail

CountDistinct

public CountDistinct(List<String> fields,
                     String name)

Constructor that creates a COUNT_DISTINCT aggregation.

Parameters:

fields - The list of fields to count distinct on.

name - The name of the count distinct field.

Method Detail

getStrategy

public Strategy getStrategy(BulletConfig config)

Description copied from class: Aggregation

Returns a new Strategy instance that handles this aggregation.

Specified by:

getStrategy in class Aggregation

Parameters:

config - The BulletConfig containing configuration for the strategy.

Returns:

The created instance of a strategy that can implement this aggregation.

toString

public String toString()

Overrides:

toString in class Aggregation