Class OrcRecordReader

java.lang.Object

io.trino.orc.OrcRecordReader

All Implemented Interfaces:

Closeable, AutoCloseable

public class OrcRecordReader
extends Object
implements Closeable

Constructor Summary

Constructors

Constructor

Description

OrcRecordReader(List<OrcColumn> readColumns, List<Type> readTypes, List<OrcReader.ProjectedLayout> readLayouts, OrcPredicate predicate, long numberOfRows, List<StripeInformation> fileStripes, Optional<ColumnMetadata<ColumnStatistics>> fileStats, List<Optional<StripeStatistics>> stripeStats, OrcDataSource orcDataSource, long splitOffset, long splitLength, ColumnMetadata<OrcType> orcTypes, Optional<OrcDecompressor> decompressor, OptionalInt rowsInRowGroup, org.joda.time.DateTimeZone legacyFileTimeZone, PostScript.HiveWriterVersion hiveWriterVersion, MetadataReader metadataReader, OrcReaderOptions options, Map<String,io.airlift.slice.Slice> userMetadata, AggregatedMemoryContext memoryUsage, Optional<OrcWriteValidation> writeValidation, int initialBatchSize, Function<Exception,RuntimeException> exceptionTransform, OrcReader.FieldMapperFactory fieldMapperFactory)

Method Summary

Modifier and Type	Method	Description
void	close()
ColumnMetadata<OrcType>	getColumnTypes()
Optional<Long>	getEndRowPosition()
long	getFilePosition()	Return the row position relative to the start of the file.
long	getFileRowCount()	Returns the total number of rows in the file.
long	getMaxCombinedBytesPerRow()	Returns the sum of the largest cells in size from each column
long	getReaderPosition()	Return the row position within the stripes being read by this reader.
long	getReaderRowCount()	Returns the total number of rows that can possibly be read by this reader.
long	getSplitLength()
Optional<Long>	getStartRowPosition()
long	getTotalDataLength()
Map<String,io.airlift.slice.Slice>	getUserMetadata()
Page	nextPage()

Methods inherited from class java.lang.Object

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

Constructor Details

OrcRecordReader

public OrcRecordReader(List<OrcColumn> readColumns,
 List<Type> readTypes,
 List<OrcReader.ProjectedLayout> readLayouts,
 OrcPredicate predicate,
 long numberOfRows,
 List<StripeInformation> fileStripes,
 Optional<ColumnMetadata<ColumnStatistics>> fileStats,
 List<Optional<StripeStatistics>> stripeStats,
 OrcDataSource orcDataSource,
 long splitOffset,
 long splitLength,
 ColumnMetadata<OrcType> orcTypes,
 Optional<OrcDecompressor> decompressor,
 OptionalInt rowsInRowGroup,
 org.joda.time.DateTimeZone legacyFileTimeZone,
 PostScript.HiveWriterVersion hiveWriterVersion,
 MetadataReader metadataReader,
 OrcReaderOptions options,
 Map<String,io.airlift.slice.Slice> userMetadata,
 AggregatedMemoryContext memoryUsage,
 Optional<OrcWriteValidation> writeValidation,
 int initialBatchSize,
 Function<Exception,RuntimeException> exceptionTransform,
 OrcReader.FieldMapperFactory fieldMapperFactory)
                throws OrcCorruptionException

Throws:

OrcCorruptionException

Method Details

getFilePosition

public long getFilePosition()

Return the row position relative to the start of the file.

getFileRowCount

public long getFileRowCount()

Returns the total number of rows in the file. This count includes rows for stripes that were completely excluded due to stripe statistics.

getReaderPosition

public long getReaderPosition()

Return the row position within the stripes being read by this reader. This position will include rows that were never read due to row groups that are excluded due to row group statistics. Thus, it will advance faster than the number of rows actually read.

getReaderRowCount

public long getReaderRowCount()

Returns the total number of rows that can possibly be read by this reader. This count may be fewer than the number of rows in the file if some stripes were excluded due to stripe statistics, but may be more than the number of rows read if some row groups are excluded due to statistics.

getSplitLength

public long getSplitLength()

getTotalDataLength

public long getTotalDataLength()

getMaxCombinedBytesPerRow

public long getMaxCombinedBytesPerRow()

Returns the sum of the largest cells in size from each column

getColumnTypes

public ColumnMetadata<OrcType> getColumnTypes()

getStartRowPosition

public Optional<Long> getStartRowPosition()

getEndRowPosition

public Optional<Long> getEndRowPosition()

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException

nextPage

public Page nextPage()
              throws IOException

Throws:

IOException

getUserMetadata

public Map<String,io.airlift.slice.Slice> getUserMetadata()