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

Class TopN

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.TopN

All Implemented Interfaces:

Iterable<PhysicalOperator>, GraphValue<PhysicalOperator>, PhysicalOperator

public class TopN
extends Sort

Field Summary

Fields

Modifier and Type	Field	Description
static final 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, userName

Constructor Summary

Constructors

Constructor	Description
TopN(PhysicalOperator child, List<Order.Ordering> orderings, boolean reverse, int limit)

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.
int	getLimit()
protected PhysicalOperator	getNewWithChild(PhysicalOperator child)
String	getOperatorType()
List<Order.Ordering>	getOrderings()
boolean	getReverse()
String	toString()

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

getSVMode

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, isBufferedOperator, isExecutable, setCost, setMaxAllocation, 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

TopN

public TopN(PhysicalOperator child,
 List<Order.Ordering> orderings,
 boolean reverse,
 int limit)

Method Details

getOrderings

public List<Order.Ordering> getOrderings()

Overrides:

getOrderings in class Sort

getReverse

public boolean getReverse()

Overrides:

getReverse in class Sort

getLimit

public int getLimit()

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.

Specified by:

accept in interface PhysicalOperator

Overrides:

accept in class Sort

Parameters:

physicalVisitor -

Throws:

E

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

toString

public String toString()

Overrides:

toString in class Sort