Package org.apache.druid.query.operator

Class GlueingPartitioningOperator

java.lang.Object

org.apache.druid.query.operator.AbstractPartitioningOperator

org.apache.druid.query.operator.GlueingPartitioningOperator

All Implemented Interfaces:

Operator

public class GlueingPartitioningOperator
extends AbstractPartitioningOperator

This glueing partitioning operator is supposed to continuously receive data, and output batches of partitioned RACs. It maintains a last-partitioning-boundary of the last-pushed-RAC, and attempts to glue it with the next RAC it receives, ensuring that partitions are handled correctly, even across multiple RACs.

Additionally, this assumes that data has been pre-sorted according to the partitioning columns.

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
GlueingPartitioningOperator(Operator child, List<String> partitionColumns)
GlueingPartitioningOperator(Operator child, List<String> partitionColumns, Integer maxRowsMaterialized)

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

GlueingPartitioningOperator

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

GlueingPartitioningOperator

public GlueingPartitioningOperator(Operator child,
                                   List<String> partitionColumns,
                                   Integer maxRowsMaterialized)

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