org.apache.drill.exec.store.mongo

Class MongoScanSpec

java.lang.Object

org.apache.drill.exec.store.mongo.MongoScanSpec

All Implemented Interfaces:

DrillTableSelection

public class MongoScanSpec
extends Object
implements DrillTableSelection

Constructor Summary

Constructors

Constructor and Description
MongoScanSpec(String dbName, String collectionName)
MongoScanSpec(String dbName, String collectionName, String filters, List<String> operations)

Method Summary

Modifier and Type	Method and Description
String	digest() The digest of the selection represented by the implementation.
String	getCollectionName()
String	getDbName()
String	getFilters()
List<String>	getOperations()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

MongoScanSpec

public MongoScanSpec(String dbName,
                     String collectionName)

MongoScanSpec

public MongoScanSpec(String dbName,
                     String collectionName,
                     String filters,
                     List<String> operations)

Method Detail

getDbName

public String getDbName()

getCollectionName

public String getCollectionName()

getFilters

public String getFilters()

getOperations

public List<String> getOperations()

toString

public String toString()

Overrides:

toString in class Object

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.