Package org.apache.drill.exec.expr

Class HoldingContainerExpression

java.lang.Object

org.apache.drill.exec.expr.HoldingContainerExpression

All Implemented Interfaces:

Iterable<LogicalExpression>, LogicalExpression

public class HoldingContainerExpression
extends Object
implements LogicalExpression

Wrapper around a representation of a "Holder" to represent that Holder as an expression. Whether this expression represents a declaration, initialization, or reference (use) of the holder depends on the visitor applied to this expression.

This expression class is a run-time implementation detail; it shows up in the "unknown" bucket within the visitor, where it must be parsed out using instanceof (or assumed.)

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.drill.common.expression.LogicalExpression

LogicalExpression.De, LogicalExpression.Se

Constructor Summary

Constructors

Constructor	Description
HoldingContainerExpression(ClassGenerator.HoldingContainer container)

Method Summary

Modifier and Type	Method	Description
<T, V, E extends Exception> T	accept(ExprVisitor<T,V,E> visitor, V value)
ClassGenerator.HoldingContainer	getContainer()
int	getCumulativeCost()
TypeProtos.MajorType	getMajorType()
ExpressionPosition	getPosition()
int	getSelfCost()
Iterator<LogicalExpression>	iterator()
String	toString()

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

Constructor Details

HoldingContainerExpression

public HoldingContainerExpression(ClassGenerator.HoldingContainer container)

Method Details

iterator

public Iterator<LogicalExpression> iterator()

Specified by:

iterator in interface Iterable<LogicalExpression>

getMajorType

public TypeProtos.MajorType getMajorType()

Specified by:

getMajorType in interface LogicalExpression

accept

public <T,
V,
E extends Exception> T accept(ExprVisitor<T,V,E> visitor,
 V value)
                                   throws E

Specified by:

accept in interface LogicalExpression

Throws:

E extends Exception

getContainer

public ClassGenerator.HoldingContainer getContainer()

getPosition

public ExpressionPosition getPosition()

Specified by:

getPosition in interface LogicalExpression

getSelfCost

public int getSelfCost()

Specified by:

getSelfCost in interface LogicalExpression

getCumulativeCost

public int getCumulativeCost()

Specified by:

getCumulativeCost in interface LogicalExpression

toString

public String toString()

Overrides:

toString in class Object