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

The MergingRecordBatch merges pre-sorted record batches from remote senders.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	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

Modifier and Type	Field and Description
MappingSet	COPIER_MAPPING_SET
MappingSet	LEFT_MAPPING
MappingSet	MAIN_MAPPING
MappingSet	RIGHT_MAPPING

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

container, oContext, popConfig, state, stats, unionTypeEnabled

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

MAX_BATCH_SIZE

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
void	buildSchema()
void	close()
FragmentContext	getContext() Gets the FragmentContext of the current query fragment.
int	getRecordCount() Gets the number of records that are within this record.
BatchSchema	getSchema() Gets the current schema of this record batch.
SelectionVector2	getSelectionVector2()
SelectionVector4	getSelectionVector4()
VectorWrapper<?>	getValueAccessorById(Class<?> clazz, int... ids)
TypedFieldId	getValueVectorId(SchemaPath path) Gets the value vector type and ID for the given schema path.
WritableBatch	getWritableBatch() Gets a writable version of this batch.
RecordBatch.IterOutcome	innerNext()
Iterator<VectorWrapper<?>>	iterator()
void	kill(boolean sendUpstream) Informs child nodes that this query should be terminated.
protected void	killIncoming(boolean sendUpstream)

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

getOutgoingContainer, getPopConfig, next, next, next

Methods inherited from class java.lang.Object

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

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

getOutgoingContainer, next

Field Detail

MAIN_MAPPING

public final MappingSet MAIN_MAPPING

LEFT_MAPPING

public final MappingSet LEFT_MAPPING

RIGHT_MAPPING

public final MappingSet RIGHT_MAPPING

COPIER_MAPPING_SET

public final MappingSet COPIER_MAPPING_SET

Constructor Detail

MergingRecordBatch

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

Throws:

OutOfMemoryException

Method Detail

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 #OK_NEW_SCHEMA or #OK.

The schema changes when and only when RecordBatch.next() returns #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()
                 throws SchemaChangeException

Overrides:

buildSchema in class AbstractRecordBatch<MergingReceiverPOP>

Throws:

SchemaChangeException

getRecordCount

public int getRecordCount()

Description copied from interface: RecordBatch

Gets the number of records that are within this record.

Specified by:

getRecordCount in interface RecordBatch

Specified by:

getRecordCount in interface VectorAccessible

Returns:

number of records

kill

public void kill(boolean sendUpstream)

Description copied from interface: RecordBatch

Informs child nodes that this query should be terminated. Child nodes should use the QueryContext to determine what has happened.

Specified by:

kill in interface RecordBatch

Overrides:

kill in class AbstractRecordBatch<MergingReceiverPOP>

killIncoming

protected void killIncoming(boolean sendUpstream)

Specified by:

killIncoming in class AbstractRecordBatch<MergingReceiverPOP>

iterator

public Iterator<VectorWrapper<?>> iterator()

Specified by:

iterator in interface Iterable<VectorWrapper<?>>

Overrides:

iterator in class AbstractRecordBatch<MergingReceiverPOP>

getSelectionVector2

public SelectionVector2 getSelectionVector2()

Specified by:

getSelectionVector2 in interface VectorAccessible

Overrides:

getSelectionVector2 in class AbstractRecordBatch<MergingReceiverPOP>

getSelectionVector4

public SelectionVector4 getSelectionVector4()

Specified by:

getSelectionVector4 in interface VectorAccessible

Overrides:

getSelectionVector4 in class AbstractRecordBatch<MergingReceiverPOP>

getValueVectorId

public TypedFieldId getValueVectorId(SchemaPath path)

Description copied from interface: RecordBatch

Gets the value vector type and ID for the given schema path. The TypedFieldId should store a fieldId which is the same as the ordinal position of the field within the Iterator provided this class's implementation of Iterable.

Specified by:

getValueVectorId in interface RecordBatch

Specified by:

getValueVectorId in interface VectorAccessible

Overrides:

getValueVectorId in class AbstractRecordBatch<MergingReceiverPOP>

Parameters:

path - The path where the vector should be located.

Returns:

The local field id associated with this vector. If no field matches this path, this will return a null TypedFieldId

getValueAccessorById

public VectorWrapper<?> getValueAccessorById(Class<?> clazz,
                                    int... ids)

Specified by:

getValueAccessorById in interface RecordBatch

Specified by:

getValueAccessorById in interface VectorAccessible

Overrides:

getValueAccessorById in class AbstractRecordBatch<MergingReceiverPOP>

getWritableBatch

public WritableBatch getWritableBatch()

Description copied from interface: RecordBatch

Gets a writable version of this batch. Takes over ownership of existing buffers.

Specified by:

getWritableBatch in interface RecordBatch

Overrides:

getWritableBatch in class AbstractRecordBatch<MergingReceiverPOP>

close

public void close()

Specified by:

close in interface AutoCloseable

Overrides:

close in class AbstractRecordBatch<MergingReceiverPOP>