Package org.apache.drill.exec.store.dfs.easy

Class EasyFileScanBuilder

java.lang.Object

org.apache.drill.exec.physical.impl.scan.v3.ScanLifecycleBuilder

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

org.apache.drill.exec.store.dfs.easy.EasyFileScanBuilder

public class EasyFileScanBuilder
extends FileScanLifecycleBuilder

Create the file scan lifecycle that manages the scan. The lifecycle creates batch readers one by one for each file or block. It defines semantic rules for projection. It handles a provided schema. Also handles "early" or "late" schema readers. This version handles the scan limit automatically.

This is for "version 2" of EVF. Newer code should use this version

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	EasyFileScanBuilder.EvfErrorContext

Nested classes/interfaces inherited from class org.apache.drill.exec.physical.impl.scan.v3.ScanLifecycleBuilder

ScanLifecycleBuilder.DummyReaderFactory, ScanLifecycleBuilder.SchemaValidator

Field Summary

Fields inherited from class org.apache.drill.exec.physical.impl.scan.v3.file.FileScanLifecycleBuilder

maxPartitionDepth, rootDir, useLegacyWildcardExpansion

Fields inherited from class org.apache.drill.exec.physical.impl.scan.v3.ScanLifecycleBuilder

allowRequiredNullColumns, allowSchemaChange, DEFAULT_BATCH_BYTE_COUNT, DEFAULT_BATCH_ROW_COUNT, definedSchema, disableEmptyResults, enableSchemaBatch, errorContext, MAX_BATCH_BYTE_SIZE, MAX_BATCH_ROW_COUNT, MIN_BATCH_BYTE_SIZE, nullType, providedSchema, schemaValidator, userName

Constructor Summary

Constructors

Constructor	Description
EasyFileScanBuilder(FragmentContext context, EasySubScan scan, EasyFormatPlugin<? extends FormatPluginConfig> plugin)	Constructor

Method Summary

Methods inherited from class org.apache.drill.exec.physical.impl.scan.v3.file.FileScanLifecycleBuilder

build, compressible, fileSplitImpls, fileSplits, fileSystemConfig, fileSystemConfig, isCompressible, maxPartitionDepth, maxPartitionDepth, rootDir, rootDir, splits, useLegacyWildcardExpansion, useLegacyWildcardExpansion

Methods inherited from class org.apache.drill.exec.physical.impl.scan.v3.ScanLifecycleBuilder

allowRequiredNullColumns, allowRequiredNullColumns, allowSchemaChange, allowSchemaChange, batchByteLimit, batchRecordLimit, buildScan, buildScanOperator, definedSchema, definedSchema, disableEmptyResults, enableSchemaBatch, errorContext, errorContext, limit, limit, nullType, nullType, options, options, projection, projection, providedSchema, providedSchema, readerFactory, readerFactory, scanBatchByteLimit, scanBatchRecordLimit, schemaValidator, schemaValidator, userName, userName

Methods inherited from class java.lang.Object

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

Constructor Details

EasyFileScanBuilder

public EasyFileScanBuilder(FragmentContext context,
 EasySubScan scan,
 EasyFormatPlugin<? extends FormatPluginConfig> plugin)

Constructor

Parameters:

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

Throws:

ExecutionSetupException - for all setup failures