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

Class NestedLoopJoinBatch

java.lang.Object

org.apache.drill.exec.record.AbstractRecordBatch<NestedLoopJoinPOP>

org.apache.drill.exec.record.AbstractBinaryRecordBatch<NestedLoopJoinPOP>

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

All Implemented Interfaces:

AutoCloseable, Iterable<VectorWrapper<?>>, CloseableRecordBatch, RecordBatch, VectorAccessible

public class NestedLoopJoinBatch
extends AbstractBinaryRecordBatch<NestedLoopJoinPOP>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.exec.record.AbstractBinaryRecordBatch

AbstractBinaryRecordBatch.Metric

Nested classes/interfaces inherited from class org.apache.drill.exec.record.AbstractRecordBatch

AbstractRecordBatch.BatchState

Nested classes/interfaces inherited from interface org.apache.drill.exec.record.RecordBatch

RecordBatch.IterOutcome

Field Summary

Fields

Modifier and Type	Field	Description
protected static final int	LEFT_INPUT
protected static final int	RIGHT_INPUT

Fields inherited from class org.apache.drill.exec.record.AbstractBinaryRecordBatch

batchMemoryManager, left, LEFT_INDEX, leftUpstream, numInputs, right, RIGHT_INDEX, rightUpstream

Fields inherited from class org.apache.drill.exec.record.AbstractRecordBatch

batchStatsContext, container, context, oContext, popConfig, state, stats, unionTypeEnabled

Fields inherited from interface org.apache.drill.exec.record.RecordBatch

MAX_BATCH_ROW_COUNT

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	NestedLoopJoinBatch(NestedLoopJoinPOP popConfig, FragmentContext context, RecordBatch left, RecordBatch right)

Method Summary

Modifier and Type	Method	Description
protected void	buildSchema()	Builds the output container's schema.
protected void	cancelIncoming()
void	close()
void	dump()	Perform dump of this batch's state to logs.
int	getRecordCount()	Get the number of records.
RecordBatch.IterOutcome	innerNext()	Method drains the right side input of the NLJ and accumulates the data in a hyper container.

Methods inherited from class org.apache.drill.exec.record.AbstractBinaryRecordBatch

checkForEarlyFinish, getBatchMemoryManager, prefetchFirstBatchFromBothSides, updateBatchMemoryManagerStats, verifyOutcomeToSetBatchState

Methods inherited from class org.apache.drill.exec.record.AbstractRecordBatch

cancel, checkContinue, getContainer, getContext, getOutgoingContainer, getPopConfig, getRecordBatchStatsContext, getSchema, getSelectionVector2, getSelectionVector4, getValueAccessorById, getValueVectorId, getWritableBatch, isRecordBatchStatsLoggingEnabled, iterator, next, next, next, schemaChangeException, schemaChangeException

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Details

LEFT_INPUT

protected static final int LEFT_INPUT

See Also:

• Constant Field Values

RIGHT_INPUT

protected static final int RIGHT_INPUT

See Also:

• Constant Field Values

Constructor Details

NestedLoopJoinBatch

protected NestedLoopJoinBatch(NestedLoopJoinPOP popConfig,
 FragmentContext context,
 RecordBatch left,
 RecordBatch right)
                       throws OutOfMemoryException

Throws:

OutOfMemoryException

Method Details

innerNext

public RecordBatch.IterOutcome innerNext()

Method drains the right side input of the NLJ and accumulates the data in a hyper container. Once we have all the data from the right side we process the left side one batch at a time and produce the output batch

Specified by:

innerNext in class AbstractRecordBatch<NestedLoopJoinPOP>

Returns:

IterOutcome state of the nested loop join batch

buildSchema

protected void buildSchema()

Builds the output container's schema. Goes over the left and the right batch and adds the corresponding vectors to the output container.

Overrides:

buildSchema in class AbstractRecordBatch<NestedLoopJoinPOP>

Throws:

SchemaChangeException - if batch schema was changed during execution

close

public void close()

Specified by:

close in interface AutoCloseable

Overrides:

close in class AbstractRecordBatch<NestedLoopJoinPOP>

cancelIncoming

protected void cancelIncoming()

Overrides:

cancelIncoming in class AbstractBinaryRecordBatch<NestedLoopJoinPOP>

getRecordCount

public int getRecordCount()

Description copied from interface: VectorAccessible

Get the number of records.

Returns:

number of records

dump

public void dump()

Description copied from interface: RecordBatch

Perform dump of this batch's state to logs.