org.apache.drill.exec.store.hive.readers

Class ReadersInitializer

java.lang.Object

org.apache.drill.exec.store.hive.readers.ReadersInitializer

public class ReadersInitializer
extends Object

Factory for creation of Hive record readers used by HiveScanBatchCreator.

Constructor Summary

Constructors

Constructor and Description
ReadersInitializer()

Method Summary

Modifier and Type	Method and Description
static List<RecordReader>	init(ExecutorFragmentContext ctx, HiveSubScan config) Selects reader constructor reference as HiveReaderFactory readerFactory.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadersInitializer

public ReadersInitializer()

Method Detail

init

public static List<RecordReader> init(ExecutorFragmentContext ctx,
                                      HiveSubScan config)

Selects reader constructor reference as HiveReaderFactory readerFactory. Then check if input splits are empty creates empty record reader, or one reader per split otherwise.

Parameters:

ctx - context related to fragment

config - context which holds different Hive configurations

Returns:

list containing one or more readers