org.apache.drill.exec.physical.impl.aggregate

Class HashAggTemplate

java.lang.Object

org.apache.drill.exec.physical.impl.aggregate.HashAggTemplate

All Implemented Interfaces:

HashAggregator

public abstract class HashAggTemplate
extends Object
implements HashAggregator

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	HashAggTemplate.BatchHolder
static class	HashAggTemplate.Metric

Nested classes/interfaces inherited from interface org.apache.drill.exec.physical.impl.aggregate.HashAggregator

HashAggregator.AggIterOutcome, HashAggregator.AggOutcome

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.slf4j.Logger	logger

Fields inherited from interface org.apache.drill.exec.physical.impl.aggregate.HashAggregator

TEMPLATE_DEFINITION

Constructor Summary

Constructors

Constructor and Description
HashAggTemplate()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	allFlushed()
boolean	buildComplete()
void	cleanup()
abstract void	doSetup(RecordBatch incoming)
HashAggregator.AggOutcome	doWork() Read and process (i.e., insert into the hash table and aggregate) records from the current batch.
boolean	earlyOutput()
RecordBatch	getNewIncoming() get new incoming: (when reading spilled files like an "incoming")
RecordBatch.IterOutcome	getOutcome()
int	getOutputCount()
abstract int	getVectorIndex(int recordIndex)
protected HashAggTemplate.BatchHolder	newBatchHolder()
int	numGroupedRecords()
HashAggregator.AggIterOutcome	outputCurrentBatch() Output the next batch from partition "nextPartitionToReturn"
abstract boolean	resetValues()
void	setup(HashAggregate hashAggrConfig, HashTableConfig htConfig, FragmentContext context, OperatorContext oContext, RecordBatch incoming, HashAggBatch outgoing, LogicalExpression[] valueExprs, List<TypedFieldId> valueFieldIds, TypedFieldId[] groupByOutFieldIds, VectorContainer outContainer, int extraRowBytes)

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.slf4j.Logger logger

Constructor Detail

HashAggTemplate

public HashAggTemplate()

Method Detail

setup

public void setup(HashAggregate hashAggrConfig,
         HashTableConfig htConfig,
         FragmentContext context,
         OperatorContext oContext,
         RecordBatch incoming,
         HashAggBatch outgoing,
         LogicalExpression[] valueExprs,
         List<TypedFieldId> valueFieldIds,
         TypedFieldId[] groupByOutFieldIds,
         VectorContainer outContainer,
         int extraRowBytes)
           throws SchemaChangeException,
                  IOException

Specified by:

setup in interface HashAggregator

Throws:

SchemaChangeException

IOException

getNewIncoming

public RecordBatch getNewIncoming()

get new incoming: (when reading spilled files like an "incoming")

Specified by:

getNewIncoming in interface HashAggregator

Returns:

The (newly replaced) incoming

doWork

public HashAggregator.AggOutcome doWork()

Read and process (i.e., insert into the hash table and aggregate) records from the current batch. Once complete, get the incoming NEXT batch and process it as well, etc. For 1st phase, may return when an early output needs to be performed.

Specified by:

doWork in interface HashAggregator

Returns:

Agg outcome status

getOutcome

public RecordBatch.IterOutcome getOutcome()

Specified by:

getOutcome in interface HashAggregator

getOutputCount

public int getOutputCount()

Specified by:

getOutputCount in interface HashAggregator

cleanup

public void cleanup()

Specified by:

cleanup in interface HashAggregator

newBatchHolder

protected HashAggTemplate.BatchHolder newBatchHolder()

outputCurrentBatch

public HashAggregator.AggIterOutcome outputCurrentBatch()

Output the next batch from partition "nextPartitionToReturn"

Specified by:

outputCurrentBatch in interface HashAggregator

Returns:

iteration outcome (e.g., OK, NONE ...)

allFlushed

public boolean allFlushed()

Specified by:

allFlushed in interface HashAggregator

buildComplete

public boolean buildComplete()

Specified by:

buildComplete in interface HashAggregator

earlyOutput

public boolean earlyOutput()

Specified by:

earlyOutput in interface HashAggregator

numGroupedRecords

public int numGroupedRecords()

doSetup

public abstract void doSetup(@Named(value="incoming")
           RecordBatch incoming)
                      throws SchemaChangeException

Throws:

SchemaChangeException

getVectorIndex

public abstract int getVectorIndex(@Named(value="recordIndex")
                 int recordIndex)
                            throws SchemaChangeException

Throws:

SchemaChangeException

resetValues

public abstract boolean resetValues()
                             throws SchemaChangeException

Throws:

SchemaChangeException