Package org.apache.druid.query.operator

Class NaivePartitioningOperator

java.lang.Object

org.apache.druid.query.operator.AbstractPartitioningOperator

org.apache.druid.query.operator.NaivePartitioningOperator

All Implemented Interfaces:

Operator

public class NaivePartitioningOperator
extends AbstractPartitioningOperator

This naive partitioning operator assumes that it's child operator always gives it RowsAndColumns objects that are a superset of the partitions that it needs to provide. It will never attempt to make a partition larger than a single RowsAndColumns object that it is given from its child Operator. A different operator should be used if that is an important bit of functionality to have.

Additionally, this assumes that data has been pre-sorted according to the partitioning columns. If it is given data that has not been pre-sorted, an exception is expected to be thrown.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.druid.query.operator.AbstractPartitioningOperator

AbstractPartitioningOperator.AbstractReceiver, AbstractPartitioningOperator.Continuation, AbstractPartitioningOperator.HandleContinuationResult

Nested classes/interfaces inherited from interface org.apache.druid.query.operator.Operator

Operator.Receiver, Operator.Signal

Field Summary

Fields inherited from class org.apache.druid.query.operator.AbstractPartitioningOperator

child, partitionColumns

Constructor Summary

Constructors

Constructor	Description
NaivePartitioningOperator(List<String> partitionColumns, Operator child)

Method Summary

Modifier and Type	Method	Description
protected Operator.Receiver	createReceiver(Operator.Receiver delegate, AtomicReference<Iterator<RowsAndColumns>> iterHolder)
protected AbstractPartitioningOperator.HandleContinuationResult	handleContinuation(Operator.Receiver receiver, AbstractPartitioningOperator.Continuation cont)

Methods inherited from class org.apache.druid.query.operator.AbstractPartitioningOperator

goOrContinue, handleNonGoCases

Methods inherited from class java.lang.Object

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

Constructor Detail

NaivePartitioningOperator

public NaivePartitioningOperator(List<String> partitionColumns,
                                 Operator child)

Method Detail

handleContinuation

protected AbstractPartitioningOperator.HandleContinuationResult handleContinuation(Operator.Receiver receiver,
                                                                                   AbstractPartitioningOperator.Continuation cont)

Specified by:

handleContinuation in class AbstractPartitioningOperator

createReceiver

protected Operator.Receiver createReceiver(Operator.Receiver delegate,
                                           AtomicReference<Iterator<RowsAndColumns>> iterHolder)

Specified by:

createReceiver in class AbstractPartitioningOperator