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

Class ByAggregationFactory

java.lang.Object

com.illumon.iris.db.v2.by.ByAggregationFactory

All Implemented Interfaces:

AggregationContextFactory

public class ByAggregationFactory
extends Object
implements AggregationContextFactory

An AggregationContextFactory used in the implementation of Table.by(com.illumon.iris.db.v2.by.AggregationStateFactory, com.illumon.iris.db.v2.select.SelectColumn...).

Method Summary

Modifier and Type	Method	Description
boolean	allowKeyOnlySubstitution()	Should we allow substitution with a KeyOnlyAggregationFactory (e.g.
static QueryTable	by(AggregationControl aggregationControl, QueryTable inputTable, String... groupByColumnNames)
static QueryTable	by(AggregationControl aggregationControl, QueryTable inputTable, String indexColumnName, SelectColumn[] groupByColumns)
static QueryTable	by(QueryTable inputTable, SelectColumn[] groupByColumns)
static QueryTable	by(QueryTable inputTable, String... groupByColumnNames)
static QueryTable	indexOnlyBy(QueryTable inputTable, String indexColumnName, SelectColumn... groupByColumns)
com.illumon.iris.db.v2.by.AggregationContext	makeAggregationContext(Table inputTable, String... groupByColumnNames)	Make an AggregationContext for this aggregation.
String	toString()

Methods inherited from class java.lang.Object

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

Method Details

allowKeyOnlySubstitution

public boolean allowKeyOnlySubstitution()

Description copied from interface: AggregationContextFactory

Should we allow substitution with a KeyOnlyAggregationFactory (e.g. selectDistinct) when there are only key columns? Instances whose operators could have side effects or are already KeyOnlyAggregationFactory should return false.

Specified by:

allowKeyOnlySubstitution in interface AggregationContextFactory

Returns:

Whether to allow a KeyOnlyAggregationFactory to be substituted for this when there are only key columns

makeAggregationContext

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

Description copied from interface: AggregationContextFactory

Make an AggregationContext for this aggregation.

Specified by:

makeAggregationContext in interface AggregationContextFactory

Parameters:

inputTable - The source Table to aggregate

groupByColumnNames - The key column names

Returns:

A new or safely reusable AggregationContext

toString

public String toString()

Overrides:

toString in class Object

by

public static QueryTable by(@NotNull
 QueryTable inputTable,
 @NotNull
 String... groupByColumnNames)

by

public static QueryTable by(@NotNull
 QueryTable inputTable,
 @NotNull
 SelectColumn[] groupByColumns)

by

public static QueryTable by(@NotNull
 AggregationControl aggregationControl,
 @NotNull
 QueryTable inputTable,
 @NotNull
 String... groupByColumnNames)

indexOnlyBy

public static QueryTable indexOnlyBy(@NotNull
 QueryTable inputTable,
 @NotNull
 String indexColumnName,
 @NotNull
 SelectColumn... groupByColumns)

by

public static QueryTable by(@NotNull
 AggregationControl aggregationControl,
 @NotNull
 QueryTable inputTable,
 @Nullable
 String indexColumnName,
 @NotNull
 SelectColumn[] groupByColumns)