org.apache.drill.exec.physical.config

Class ExternalSort

java.lang.Object

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

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

org.apache.drill.exec.physical.config.Sort

org.apache.drill.exec.physical.config.ExternalSort

All Implemented Interfaces:

Iterable<PhysicalOperator>, GraphValue<PhysicalOperator>, PhysicalOperator

public class ExternalSort
extends Sort

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEFAULT_SORT_ALLOCATION
static String	OPERATOR_TYPE

Fields inherited from class org.apache.drill.exec.physical.config.Sort

orderings, reverse

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

Constructor Summary

Constructors

Constructor and Description
ExternalSort(PhysicalOperator child, List<Order.Ordering> orderings, boolean reverse)

Method Summary

Modifier and Type	Method and Description
protected PhysicalOperator	getNewWithChild(PhysicalOperator child)
String	getOperatorType()
boolean	isBufferedOperator(QueryContext queryContext) The External Sort operator supports spilling
void	setMaxAllocation(long maxAllocation) Any operator that supports spilling should override this method

Methods inherited from class org.apache.drill.exec.physical.config.Sort

accept, getOrderings, getReverse, getSVMode, 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, 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 Detail

DEFAULT_SORT_ALLOCATION

public static final long DEFAULT_SORT_ALLOCATION

See Also:

Constant Field Values

OPERATOR_TYPE

public static final String OPERATOR_TYPE

See Also:

Constant Field Values

Constructor Detail

ExternalSort

public ExternalSort(PhysicalOperator child,
                    List<Order.Ordering> orderings,
                    boolean reverse)

Method Detail

getNewWithChild

protected PhysicalOperator getNewWithChild(PhysicalOperator child)

Overrides:

getNewWithChild in class Sort

getOperatorType

public String getOperatorType()

Specified by:

getOperatorType in interface PhysicalOperator

Overrides:

getOperatorType in class Sort

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 External Sort operator supports spilling

Specified by:

isBufferedOperator in interface PhysicalOperator

Overrides:

isBufferedOperator in class AbstractBase

Parameters:

queryContext -

Returns:

true