Package io.trino.parquet.reader.decoders

Class DeltaBinaryPackedDecoders.DeltaBinaryPackedByteDecoder

java.lang.Object

io.trino.parquet.reader.decoders.DeltaBinaryPackedDecoders.DeltaBinaryPackedByteDecoder

All Implemented Interfaces:

ValueDecoder<byte[]>

Enclosing class:

DeltaBinaryPackedDecoders

public static class DeltaBinaryPackedDecoders.DeltaBinaryPackedByteDecoder
extends Object

Nested Class Summary

Nested classes/interfaces inherited from interface io.trino.parquet.reader.decoders.ValueDecoder

ValueDecoder.EmptyValueDecoder<T>, ValueDecoder.LevelsDecoderProvider, ValueDecoder.ValueDecodersProvider<T>

Constructor Summary

Constructors

Constructor	Description
DeltaBinaryPackedByteDecoder()

Method Summary

Modifier and Type	Method	Description
protected byte[]	createMiniBlockBuffer(int size)
int	getValueCount()
void	init(SimpleSliceInputStream input)
void	read(byte[] values, int offset, int length)
void	readInternal(byte[] values, int offset, int length)
protected void	setValue(byte[] values, int offset, long value)
void	skip(int n)
protected long	unpack(byte[] output, int outputOffset, int length, SimpleSliceInputStream input, long minDelta, byte bitWidth)	This method needs to do two things: Set output[outputOffset-1] to 'previousValue'.

Methods inherited from class java.lang.Object

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

Constructor Details

DeltaBinaryPackedByteDecoder

public DeltaBinaryPackedByteDecoder()

Method Details

createMiniBlockBuffer

protected byte[] createMiniBlockBuffer(int size)

setValue

protected void setValue(byte[] values,
 int offset,
 long value)

read

public void read(byte[] values,
 int offset,
 int length)

unpack

protected long unpack(byte[] output,
 int outputOffset,
 int length,
 SimpleSliceInputStream input,
 long minDelta,
 byte bitWidth)

This method needs to do two things:

• Set output[outputOffset-1] to 'previousValue'. This way the inner loops are consistent and can handle iterations in batches of 32. This is needed since some values might have been skipped
• Delegate unpacking to the corresponding static method from DeltaPackingUtils class

Returns:

Last value read

init

public void init(SimpleSliceInputStream input)

Specified by:

init in interface ValueDecoder<ValuesType>

readInternal

public void readInternal(byte[] values,
 int offset,
 int length)

getValueCount

public int getValueCount()

skip

public void skip(int n)

Specified by:

skip in interface ValueDecoder<ValuesType>