org.apache.drill.exec.physical.impl.join

Class BatchSizePredictorImpl.Factory

java.lang.Object

org.apache.drill.exec.physical.impl.join.BatchSizePredictorImpl.Factory

All Implemented Interfaces:

BatchSizePredictor.Factory

Enclosing class:

BatchSizePredictorImpl

public static class BatchSizePredictorImpl.Factory
extends Object
implements BatchSizePredictor.Factory

Field Summary

Fields

Modifier and Type	Field and Description
static BatchSizePredictorImpl.Factory	INSTANCE

Method Summary

Modifier and Type	Method and Description
BatchSizePredictor	create(RecordBatch batch, double fragmentationFactor, double safetyFactor) Creates a predictor with a batch whose data needs to be used to predict other batch sizes.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final BatchSizePredictorImpl.Factory INSTANCE

Method Detail

create

public BatchSizePredictor create(RecordBatch batch,
                                 double fragmentationFactor,
                                 double safetyFactor)

Description copied from interface: BatchSizePredictor.Factory

Creates a predictor with a batch whose data needs to be used to predict other batch sizes.

Specified by:

create in interface BatchSizePredictor.Factory

Parameters:

batch - The batch whose size needs to be predicted.

fragmentationFactor - A constant used to predict value vector doubling.

safetyFactor - A constant used to leave padding for unpredictable incoming batches.