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

Class Project

java.lang.Object

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

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

org.apache.drill.exec.physical.config.Project

All Implemented Interfaces:

Iterable<PhysicalOperator>, GraphValue<PhysicalOperator>, PhysicalOperator

public class Project
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
Project(List<NamedExpression> exprs, PhysicalOperator child)
Project(List<NamedExpression> exprs, PhysicalOperator child, boolean outputProj)

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.
List<NamedExpression>	getExprs()
protected PhysicalOperator	getNewWithChild(PhysicalOperator child)
String	getOperatorType()
BatchSchema.SelectionVectorMode	getSVMode()	Describes the SelectionVector Mode for the output steam from this physical op.
boolean	isOutputProj()

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, toString, 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

Project

public Project(List<NamedExpression> exprs,
 PhysicalOperator child,
 boolean outputProj)

Project

public Project(List<NamedExpression> exprs,
 PhysicalOperator child)

Method Details

getExprs

public List<NamedExpression> getExprs()

isOutputProj

public boolean isOutputProj()

Returns:

true if Project is for the query's final output. Such Project is added by TopProjectVisitor, to handle fast NONE when all the inputs to the query are empty and are skipped.

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.

Throws:

E extends Throwable

getNewWithChild

protected PhysicalOperator getNewWithChild(PhysicalOperator child)

Specified by:

getNewWithChild in class AbstractSingle

getSVMode

public BatchSchema.SelectionVectorMode getSVMode()

Description copied from interface: PhysicalOperator

Describes the SelectionVector Mode for the output steam from this physical op. This property is used during physical plan creating using PhysicalPlanCreator.

Specified by:

getSVMode in interface PhysicalOperator

Overrides:

getSVMode in class AbstractBase

getOperatorType

public String getOperatorType()