Package com.illumon.iris.db.v2.by

Class KeyOnlyAggregationFactory

java.lang.Object

com.illumon.iris.db.v2.by.KeyOnlyAggregationFactory

All Implemented Interfaces:

AggregationContextFactory

public class KeyOnlyAggregationFactory
extends Object
implements AggregationContextFactory

Simplest factory that has no operators or results, used to implement selectDistinct.

Constructor Summary

Constructors

Constructor	Description
KeyOnlyAggregationFactory()

Method Summary

Modifier and Type	Method	Description
com.illumon.iris.db.v2.by.AggregationContext	makeAggregationContext(Table table, String... groupByColumns)	Make an AggregationContext for this aggregation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.illumon.iris.db.v2.by.AggregationContextFactory

allowKeyOnlySubstitution

Constructor Details

KeyOnlyAggregationFactory

public KeyOnlyAggregationFactory()

Method Details

makeAggregationContext

public com.illumon.iris.db.v2.by.AggregationContext makeAggregationContext(@NotNull Table table, @NotNull String... groupByColumns)

Description copied from interface: AggregationContextFactory

Make an AggregationContext for this aggregation.

Specified by:

makeAggregationContext in interface AggregationContextFactory

Parameters:

table - The source Table to aggregate

groupByColumns - The key column names

Returns:

A new or safely reusable AggregationContext