Package org.apache.drill.exec.physical.config

Class HashAggregate

java.lang.Object

org.apache.drill.exec.physical.base.AbstractBase

org.apache.drill.exec.physical.base.AbstractSingle

org.apache.drill.exec.physical.config.HashAggregate

All Implemented Interfaces:

Iterable<PhysicalOperator>, GraphValue<PhysicalOperator>, PhysicalOperator

Direct Known Subclasses:

MetadataHashAggPOP

public class HashAggregate
extends AbstractSingle

Field Summary

Fields

Modifier and Type	Field	Description
static final String	OPERATOR_TYPE

Fields inherited from class org.apache.drill.exec.physical.base.AbstractSingle

child

Fields inherited from class org.apache.drill.exec.physical.base.AbstractBase

INIT_ALLOCATION, initialAllocation, MAX_ALLOCATION, maxAllocation, userName

Constructor Summary

Constructors

Constructor	Description
HashAggregate(PhysicalOperator child, AggPrelBase.OperatorPhase aggPhase, List<NamedExpression> groupByExprs, List<NamedExpression> aggrExprs, float cardinality)

Method Summary

Modifier and Type	Method	Description
<T, X, E extends Throwable> T	accept(PhysicalVisitor<T,X,E> physicalVisitor, X value)	Provides capability to build a set of output based on traversing a query graph tree.
AggPrelBase.OperatorPhase	getAggPhase()
List<NamedExpression>	getAggrExprs()
double	getCardinality()
List<NamedExpression>	getGroupByExprs()
protected PhysicalOperator	getNewWithChild(PhysicalOperator child)
String	getOperatorType()
boolean	isBufferedOperator(QueryContext queryContext)	The Hash Aggregate operator supports spilling
void	setMaxAllocation(long maxAllocation)	Any operator that supports spilling should override this method
String	toString()

Methods inherited from class org.apache.drill.exec.physical.base.AbstractSingle

getChild, getNewWithChildren, iterator

Methods inherited from class org.apache.drill.exec.physical.base.AbstractBase

accept, getCost, getInitialAllocation, getMaxAllocation, getOperatorId, getSVMode, getUserName, isExecutable, setCost, setOperatorId

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Details

OPERATOR_TYPE

public static final String OPERATOR_TYPE

See Also:

• Constant Field Values

Constructor Details

HashAggregate

public HashAggregate(PhysicalOperator child,
 AggPrelBase.OperatorPhase aggPhase,
 List<NamedExpression> groupByExprs,
 List<NamedExpression> aggrExprs,
 float cardinality)

Method Details

getAggPhase

public AggPrelBase.OperatorPhase getAggPhase()

getGroupByExprs

public List<NamedExpression> getGroupByExprs()

getAggrExprs

public List<NamedExpression> getAggrExprs()

getCardinality

public double getCardinality()

accept

public <T,
X,
E extends Throwable> T accept(PhysicalVisitor<T,X,E> physicalVisitor,
 X value)
                                     throws E

Description copied from interface: PhysicalOperator

Provides capability to build a set of output based on traversing a query graph tree.

Parameters:

physicalVisitor -

Throws:

E

getNewWithChild

protected PhysicalOperator getNewWithChild(PhysicalOperator child)

Specified by:

getNewWithChild in class AbstractSingle

getOperatorType

public String getOperatorType()

setMaxAllocation

public void setMaxAllocation(long maxAllocation)

Description copied from class: AbstractBase

Any operator that supports spilling should override this method

Specified by:

setMaxAllocation in interface PhysicalOperator

Overrides:

setMaxAllocation in class AbstractBase

Parameters:

maxAllocation - The max memory allocation to be set

isBufferedOperator

public boolean isBufferedOperator(QueryContext queryContext)

The Hash Aggregate operator supports spilling

Specified by:

isBufferedOperator in interface PhysicalOperator

Overrides:

isBufferedOperator in class AbstractBase

Parameters:

queryContext -

Returns:

true (unless a single partition is forced)

toString

public String toString()

Overrides:

toString in class Object