org.apache.drill.exec.store.dfs

Class FormatSelection

java.lang.Object

org.apache.drill.exec.store.dfs.FormatSelection

All Implemented Interfaces:

DrillTableSelection

public class FormatSelection
extends Object
implements DrillTableSelection

Constructor Summary

Constructors

Constructor and Description
FormatSelection()
FormatSelection(FormatPluginConfig format, FileSelection selection)
FormatSelection(FormatPluginConfig format, List<org.apache.hadoop.fs.Path> files)

Method Summary

Modifier and Type	Method and Description
String	digest() The digest of the selection represented by the implementation.
List<org.apache.hadoop.fs.Path>	getAsFiles()
FormatPluginConfig	getFormat()
FileSelection	getSelection()
boolean	supportsDirPruning()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

FormatSelection

public FormatSelection()

FormatSelection

public FormatSelection(FormatPluginConfig format,
                       List<org.apache.hadoop.fs.Path> files)

FormatSelection

public FormatSelection(FormatPluginConfig format,
                       FileSelection selection)

Method Detail

getFormat

public FormatPluginConfig getFormat()

getAsFiles

public List<org.apache.hadoop.fs.Path> getAsFiles()

getSelection

public FileSelection getSelection()

supportsDirPruning

public boolean supportsDirPruning()

digest

public String digest()

Description copied from interface: DrillTableSelection

The digest of the selection represented by the implementation. The selections that accompany Tables can modify the contained dataset, e.g. a file selection can restrict to a subset of the available data and a format selection can include options that affect the behaviour of the underlying reader. Two scans will end up being considered identical during logical planning if their digests are the same so selection implementations should override this method so that exactly those scans that really are identical (in terms of the data they produce) have matching digests.

Specified by:

digest in interface DrillTableSelection

Returns:

this selection's digest, normally a string built from its properties.

toString

public String toString()

Overrides:

toString in class Object