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

Class MergingRecordBatch

java.lang.Object

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

org.apache.drill.exec.physical.impl.mergereceiver.MergingRecordBatch

All Implemented Interfaces:

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

public class MergingRecordBatch
extends AbstractRecordBatch<MergingReceiverPOP>
implements RecordBatch

Merges pre-sorted record batches from remote senders.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	MergingRecordBatch.Metric
class	MergingRecordBatch.Node	A Node contains a reference to a single value in a specific incoming batch.

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

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

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

MAX_BATCH_ROW_COUNT

Constructor Summary

Constructors

Constructor	Description
MergingRecordBatch(ExchangeFragmentContext context, MergingReceiverPOP config, RawFragmentBatchProvider[] fragProviders)

Method Summary

Modifier and Type	Method	Description
void	buildSchema()
void	cancel()	Informs child operators that no more data is needed.
protected void	cancelIncoming()
void	close()
void	dump()	Perform dump of this batch's state to logs.
FragmentContext	getContext()	Gets the FragmentContext of the current query fragment.
int	getRecordCount()	Get the number of records.
BatchSchema	getSchema()	Gets the current schema of this record batch.
RecordBatch.IterOutcome	innerNext()

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

checkContinue, getContainer, getOutgoingContainer, getPopConfig, getRecordBatchStatsContext, 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, iterator, spliterator

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

getContainer, getOutgoingContainer, getValueAccessorById, getValueVectorId, getWritableBatch, next

Methods inherited from interface org.apache.drill.exec.record.VectorAccessible

getSelectionVector2, getSelectionVector4

Constructor Details

MergingRecordBatch

public MergingRecordBatch(ExchangeFragmentContext context,
 MergingReceiverPOP config,
 RawFragmentBatchProvider[] fragProviders)
                   throws OutOfMemoryException

Throws:

OutOfMemoryException

Method Details

innerNext

public RecordBatch.IterOutcome innerNext()

Specified by:

innerNext in class AbstractRecordBatch<MergingReceiverPOP>

getContext

public FragmentContext getContext()

Description copied from interface: RecordBatch

Gets the FragmentContext of the current query fragment. Useful for reporting failure information or other query-level information.

Specified by:

getContext in interface RecordBatch

Overrides:

getContext in class AbstractRecordBatch<MergingReceiverPOP>

getSchema

public BatchSchema getSchema()

Description copied from interface: RecordBatch

Gets the current schema of this record batch.

May be called only when the most recent call to RecordBatch.next(), if any, returned RecordBatch.IterOutcome.OK_NEW_SCHEMA or RecordBatch.IterOutcome.OK.

The schema changes when and only when RecordBatch.next() returns RecordBatch.IterOutcome.OK_NEW_SCHEMA.

Specified by:

getSchema in interface RecordBatch

Specified by:

getSchema in interface VectorAccessible

Overrides:

getSchema in class AbstractRecordBatch<MergingReceiverPOP>

Returns:

schema of the current batch

buildSchema

public void buildSchema()

Overrides:

buildSchema in class AbstractRecordBatch<MergingReceiverPOP>

getRecordCount

public int getRecordCount()

Description copied from interface: VectorAccessible

Get the number of records.

Specified by:

getRecordCount in interface VectorAccessible

Returns:

number of records

cancel

public void cancel()

Description copied from interface: RecordBatch

Informs child operators that no more data is needed. Only called for "normal" cancellation to avoid unnecessary compute in any worker threads. For the error case, the fragment executor will call close() on each child automatically.

The operator which triggers the cancel MUST send a NONE status downstream, or throw an exception. It is not legal to call next() on an operator after calling its cancel() method.

Specified by:

cancel in interface RecordBatch

Overrides:

cancel in class AbstractRecordBatch<MergingReceiverPOP>

cancelIncoming

protected void cancelIncoming()

Specified by:

cancelIncoming in class AbstractRecordBatch<MergingReceiverPOP>

close

public void close()

Specified by:

close in interface AutoCloseable

Overrides:

close in class AbstractRecordBatch<MergingReceiverPOP>

dump

public void dump()

Description copied from interface: RecordBatch

Perform dump of this batch's state to logs.

Specified by:

dump in interface RecordBatch