org.apache.drill.exec.physical.impl.scan.project

Class ResolvedNullColumn

java.lang.Object

org.apache.drill.exec.physical.impl.scan.project.ResolvedColumn

org.apache.drill.exec.physical.impl.scan.project.ResolvedNullColumn

All Implemented Interfaces:

ColumnProjection, NullColumnLoader.NullColumnSpec

public class ResolvedNullColumn
extends ResolvedColumn
implements NullColumnLoader.NullColumnSpec

Projected column that serves as both a resolved column (provides projection mapping) and a null column spec (provides the information needed to create the required null vectors.)

Constructor Summary

Constructors

Constructor and Description
ResolvedNullColumn(ColumnMetadata colDefn, VectorSource source, int sourceIndex)
ResolvedNullColumn(String name, TypeProtos.MajorType type, String defaultValue, VectorSource source, int sourceIndex)

Method Summary

Modifier and Type	Method and Description
String	defaultValue()
String	name() The name of the column as it appears in the output row (record batch.)
MaterializedField	schema() Return the type of this column.
void	setType(TypeProtos.MajorType type)
String	toString()
TypeProtos.MajorType	type()

Methods inherited from class org.apache.drill.exec.physical.impl.scan.project.ResolvedColumn

metadata, project, source, sourceIndex

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.drill.exec.physical.impl.scan.project.NullColumnLoader.NullColumnSpec

metadata

Constructor Detail

ResolvedNullColumn

public ResolvedNullColumn(String name,
                          TypeProtos.MajorType type,
                          String defaultValue,
                          VectorSource source,
                          int sourceIndex)

ResolvedNullColumn

public ResolvedNullColumn(ColumnMetadata colDefn,
                          VectorSource source,
                          int sourceIndex)

Method Detail

name

public String name()

Description copied from interface: ColumnProjection

The name of the column as it appears in the output row (record batch.)

Specified by:

name in interface ColumnProjection

Specified by:

name in interface NullColumnLoader.NullColumnSpec

Returns:

the output column name

type

public TypeProtos.MajorType type()

Specified by:

type in interface NullColumnLoader.NullColumnSpec

setType

public void setType(TypeProtos.MajorType type)

Specified by:

setType in interface NullColumnLoader.NullColumnSpec

schema

public MaterializedField schema()

Description copied from class: ResolvedColumn

Return the type of this column. Used primarily by the schema smoothing mechanism.

Specified by:

schema in class ResolvedColumn

Returns:

the MaterializedField representation of this column

defaultValue

public String defaultValue()

Specified by:

defaultValue in interface NullColumnLoader.NullColumnSpec

toString

public String toString()

Overrides:

toString in class Object