Package org.apache.drill.exec.physical.impl.scan.v3.file

Class ImplicitColumnMarker

java.lang.Object

org.apache.drill.exec.physical.impl.scan.v3.file.ImplicitColumnMarker

Direct Known Subclasses:

ImplicitColumnMarker.FileImplicitMarker, ImplicitColumnMarker.InternalColumnMarker, ImplicitColumnMarker.PartitionColumnMarker

public abstract class ImplicitColumnMarker
extends Object

Marks a column as implicit and provides a function to resolve an implicit column given a description of the input file.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ImplicitColumnMarker.FileImplicitMarker	Marker for a file-based, non-internal implicit column that extracts parts of the file name as defined by the implicit column definition.
static class	ImplicitColumnMarker.InternalColumnMarker
static class	ImplicitColumnMarker.PartitionColumnMarker	Partition column defined by a partition depth from the scan root folder.

Constructor Summary

Constructors

Constructor	Description
ImplicitColumnMarker()

Method Summary

Modifier and Type	Method	Description
int	index()
abstract String	resolve(FileDescrip fileInfo)
void	setIndex(int index)

Methods inherited from class java.lang.Object

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

Constructor Details

ImplicitColumnMarker

public ImplicitColumnMarker()

Method Details

setIndex

public void setIndex(int index)

index

public int index()

resolve

public abstract String resolve(FileDescrip fileInfo)