Class OrcReader

java.lang.Object

io.trino.orc.OrcReader

public class OrcReader
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	OrcReader.FieldMapper
static interface	OrcReader.FieldMapperFactory
static class	OrcReader.NameBasedProjectedLayout
static interface	OrcReader.ProjectedLayout

Field Summary

Fields

Modifier and Type	Field	Description
static final int	BATCH_SIZE_GROWTH_FACTOR
static final int	INITIAL_BATCH_SIZE
static final int	MAX_BATCH_SIZE

Method Summary

Modifier and Type	Method	Description
static Optional<OrcReader>	createOrcReader(OrcDataSource orcDataSource, OrcReaderOptions options)
OrcRecordReader	createRecordReader(List<OrcColumn> readColumns, List<Type> readTypes, OrcPredicate predicate, org.joda.time.DateTimeZone legacyFileTimeZone, AggregatedMemoryContext memoryUsage, int initialBatchSize, Function<Exception,RuntimeException> exceptionTransform)
OrcRecordReader	createRecordReader(List<OrcColumn> readColumns, List<Type> readTypes, List<OrcReader.ProjectedLayout> readLayouts, OrcPredicate predicate, long offset, long length, org.joda.time.DateTimeZone legacyFileTimeZone, AggregatedMemoryContext memoryUsage, int initialBatchSize, Function<Exception,RuntimeException> exceptionTransform, OrcReader.FieldMapperFactory fieldMapperFactory)
static OrcReader.ProjectedLayout	fullyProjectedLayout()	Constructs a ProjectedLayout where all subfields must be read
int	getBufferSize()
List<String>	getColumnNames()
CompressionKind	getCompressionKind()
Footer	getFooter()
Metadata	getMetadata()
OrcColumn	getRootColumn()

Methods inherited from class java.lang.Object

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

Field Details

MAX_BATCH_SIZE

public static final int MAX_BATCH_SIZE

See Also:

• Constant Field Values

INITIAL_BATCH_SIZE

public static final int INITIAL_BATCH_SIZE

See Also:

• Constant Field Values

BATCH_SIZE_GROWTH_FACTOR

public static final int BATCH_SIZE_GROWTH_FACTOR

See Also:

• Constant Field Values

Method Details

createOrcReader

public static Optional<OrcReader> createOrcReader(OrcDataSource orcDataSource,
 OrcReaderOptions options)
                                           throws IOException

Throws:

IOException

getColumnNames

public List<String> getColumnNames()

getFooter

public Footer getFooter()

getMetadata

public Metadata getMetadata()

getRootColumn

public OrcColumn getRootColumn()

getBufferSize

public int getBufferSize()

getCompressionKind

public CompressionKind getCompressionKind()

createRecordReader

public OrcRecordReader createRecordReader(List<OrcColumn> readColumns,
 List<Type> readTypes,
 OrcPredicate predicate,
 org.joda.time.DateTimeZone legacyFileTimeZone,
 AggregatedMemoryContext memoryUsage,
 int initialBatchSize,
 Function<Exception,RuntimeException> exceptionTransform)
                                   throws OrcCorruptionException

Throws:

OrcCorruptionException

createRecordReader

public OrcRecordReader createRecordReader(List<OrcColumn> readColumns,
 List<Type> readTypes,
 List<OrcReader.ProjectedLayout> readLayouts,
 OrcPredicate predicate,
 long offset,
 long length,
 org.joda.time.DateTimeZone legacyFileTimeZone,
 AggregatedMemoryContext memoryUsage,
 int initialBatchSize,
 Function<Exception,RuntimeException> exceptionTransform,
 OrcReader.FieldMapperFactory fieldMapperFactory)
                                   throws OrcCorruptionException

Throws:

OrcCorruptionException

fullyProjectedLayout

public static OrcReader.ProjectedLayout fullyProjectedLayout()

Constructs a ProjectedLayout where all subfields must be read