org.apache.drill.exec.store.easy.sequencefile

Class SequenceFileFormatPlugin

java.lang.Object

org.apache.drill.exec.store.dfs.easy.EasyFormatPlugin<SequenceFileFormatConfig>

org.apache.drill.exec.store.easy.sequencefile.SequenceFileFormatPlugin

All Implemented Interfaces:

FormatPlugin

public class SequenceFileFormatPlugin
extends EasyFormatPlugin<SequenceFileFormatConfig>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.exec.store.dfs.easy.EasyFormatPlugin

EasyFormatPlugin.EasyFormatConfig, EasyFormatPlugin.EasyFormatConfigBuilder

Field Summary

Fields

Modifier and Type	Field and Description
static String	OPERATOR_TYPE

Fields inherited from class org.apache.drill.exec.store.dfs.easy.EasyFormatPlugin

formatConfig

Constructor Summary

Constructors

Constructor and Description
SequenceFileFormatPlugin(String name, DrillbitContext context, org.apache.hadoop.conf.Configuration fsConf, StoragePluginConfig storageConfig, SequenceFileFormatConfig formatConfig)

Method Summary

Modifier and Type	Method and Description
protected FileScanFramework.FileScanBuilder	frameworkBuilder(OptionManager options, EasySubScan scan) Create the plugin-specific framework that manages the scan.
ManagedReader<? extends FileScanFramework.FileSchemaNegotiator>	newBatchReader(EasySubScan scan, OptionManager options)

Methods inherited from class org.apache.drill.exec.store.dfs.easy.EasyFormatPlugin

easyConfig, getConfig, getContext, getFsConf, getGroupScan, getGroupScan, getMatcher, getName, getOptimizerRules, getReaderBatch, getReaderOperatorType, getRecordReader, getRecordWriter, getScanStats, getStatisticsRecordWriter, getStorageConfig, getWriter, getWriterBatch, getWriterOperatorType, initScanBuilder, isBlockSplittable, isCompressible, isStatisticsRecordWriter, readStatistics, supportsAutoPartitioning, supportsFileImplicitColumns, supportsLimitPushdown, supportsPushDown, supportsRead, supportsStatistics, supportsWrite, useEnhancedScan, writeStatistics

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.drill.exec.store.dfs.FormatPlugin

getGroupScan, getGroupScan, getOptimizerRules

Field Detail

OPERATOR_TYPE

public static final String OPERATOR_TYPE

See Also:

Constant Field Values

Constructor Detail

SequenceFileFormatPlugin

public SequenceFileFormatPlugin(String name,
                                DrillbitContext context,
                                org.apache.hadoop.conf.Configuration fsConf,
                                StoragePluginConfig storageConfig,
                                SequenceFileFormatConfig formatConfig)

Method Detail

newBatchReader

public ManagedReader<? extends FileScanFramework.FileSchemaNegotiator> newBatchReader(EasySubScan scan,
                                                                                      OptionManager options)
                                                                               throws ExecutionSetupException

Overrides:

newBatchReader in class EasyFormatPlugin<SequenceFileFormatConfig>

Throws:

ExecutionSetupException

frameworkBuilder

protected FileScanFramework.FileScanBuilder frameworkBuilder(OptionManager options,
                                                             EasySubScan scan)
                                                      throws ExecutionSetupException

Description copied from class: EasyFormatPlugin

Create the plugin-specific framework that manages the scan. The framework creates batch readers one by one for each file or block. It defines semantic rules for projection. It handles "early" or "late" schema readers. A typical framework builds on standardized frameworks for files in general or text files in particular.

Overrides:

frameworkBuilder in class EasyFormatPlugin<SequenceFileFormatConfig>

scan - the physical operation definition for the scan operation. Contains one or more files to read. (The Easy format plugin works only for files.)

Returns:

the scan framework which orchestrates the scan operation across potentially many files

Throws:

ExecutionSetupException - for all setup failures