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

Class JoinStatus

java.lang.Object

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

public final class JoinStatus
extends Object

Maintain join state.

Field Summary

Fields

Modifier and Type	Field and Description
boolean	hasMoreData
RecordIterator	left
boolean	ok
MergeJoinBatch	outputBatch
RecordIterator	right

Constructor Summary

Constructors

Constructor and Description
JoinStatus(RecordIterator left, RecordIterator right, MergeJoinBatch output)

Method Summary

Methods

Modifier and Type	Method and Description
void	disableMarking()
void	enableMarking()
RecordBatch.IterOutcome	getLeftStatus()
JoinWorker.JoinOutcome	getOutcome() Return state of join based on status of left and right iterator.
int	getOutPosition()
RecordBatch.IterOutcome	getRightStatus()
void	incOutputPos()
void	initialize()
boolean	isHasMoreData()
boolean	isOutgoingBatchFull()
void	prepare()
void	resetOutputPos()
void	setHasMoreData(boolean hasMoreData)
boolean	shouldMark()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

left

public final RecordIterator left

right

public final RecordIterator right

outputBatch

public MergeJoinBatch outputBatch

ok

public boolean ok

hasMoreData

public boolean hasMoreData

Constructor Detail

JoinStatus

public JoinStatus(RecordIterator left,
          RecordIterator right,
          MergeJoinBatch output)

Method Detail

toString

public String toString()

Overrides:

toString in class Object

initialize

public void initialize()

prepare

public void prepare()

getLeftStatus

public RecordBatch.IterOutcome getLeftStatus()

getRightStatus

public RecordBatch.IterOutcome getRightStatus()

getOutPosition

public final int getOutPosition()

resetOutputPos

public final void resetOutputPos()

isOutgoingBatchFull

public final boolean isOutgoingBatchFull()

incOutputPos

public final void incOutputPos()

disableMarking

public void disableMarking()

enableMarking

public void enableMarking()

shouldMark

public boolean shouldMark()

isHasMoreData

public boolean isHasMoreData()

setHasMoreData

public void setHasMoreData(boolean hasMoreData)

getOutcome

public JoinWorker.JoinOutcome getOutcome()

Return state of join based on status of left and right iterator.

Returns:

1. JoinOutcome.NO_MORE_DATA : Join is finished 2. JoinOutcome.FAILURE : There is an error during join. 3. JoinOutcome.BATCH_RETURNED : one of the side has data 4. JoinOutcome.SCHEMA_CHANGED : one of the side has change in schema.