com.facebook.presto.orc.writer

Interface ColumnWriter

All Known Implementing Classes:

BooleanColumnWriter, ByteColumnWriter, DecimalColumnWriter, DoubleColumnWriter, FloatColumnWriter, ListColumnWriter, LongColumnWriter, MapColumnWriter, SliceDictionaryColumnWriter, SliceDirectColumnWriter, StructColumnWriter, TimestampColumnWriter

public interface ColumnWriter

Method Summary

Modifier and Type	Method and Description
void	beginRowGroup()
void	close()
Map<Integer,ColumnStatistics>	finishRowGroup()
long	getBufferedBytes() This method returns the size of the flushed data plus any unflushed data.
Map<Integer,ColumnEncoding>	getColumnEncodings()
Map<Integer,ColumnStatistics>	getColumnStripeStatistics()
List<StreamDataOutput>	getDataStreams() Get the data streams to be written.
List<StreamDataOutput>	getIndexStreams(CompressedMetadataWriter metadataWriter) Write index streams to the output and return the streams in the order in which they were written.
default List<ColumnWriter>	getNestedColumnWriters()
long	getRetainedBytes()
void	reset()
void	writeBlock(Block block)

Method Detail

getNestedColumnWriters

default List<ColumnWriter> getNestedColumnWriters()

getColumnEncodings

Map<Integer,ColumnEncoding> getColumnEncodings()

beginRowGroup

void beginRowGroup()

writeBlock

void writeBlock(Block block)

finishRowGroup

Map<Integer,ColumnStatistics> finishRowGroup()

close

void close()

getColumnStripeStatistics

Map<Integer,ColumnStatistics> getColumnStripeStatistics()

getIndexStreams

List<StreamDataOutput> getIndexStreams(CompressedMetadataWriter metadataWriter)
                                throws IOException

Write index streams to the output and return the streams in the order in which they were written. The ordering is critical because the stream only contain a length with no offset.

Throws:

IOException

getDataStreams

List<StreamDataOutput> getDataStreams()

Get the data streams to be written.

getBufferedBytes

long getBufferedBytes()

This method returns the size of the flushed data plus any unflushed data. If the output is compressed, flush data size is the size after compression.

getRetainedBytes

long getRetainedBytes()

reset

void reset()