Package io.trino.operator.output

Class RleAwarePositionsAppender

java.lang.Object

io.trino.operator.output.RleAwarePositionsAppender

All Implemented Interfaces:

PositionsAppender

public class RleAwarePositionsAppender
extends Object
implements PositionsAppender

PositionsAppender that will produce RunLengthEncodedBlock output if possible, that is all inputs are RunLengthEncodedBlock blocks with the same value.

Constructor Summary

Constructors

Constructor	Description
RleAwarePositionsAppender(BlockTypeOperators.BlockPositionIsDistinctFrom isDistinctFromOperator, PositionsAppender delegate)

Method Summary

Modifier and Type	Method	Description
void	append(int position, Block value)	Appends single position.
void	append(it.unimi.dsi.fastutil.ints.IntArrayList positions, Block source)
void	appendRle(Block value, int positionCount)	Appends the specified value positionCount times.
Block	build()	Creates the block from the appender data.
long	getRetainedSizeInBytes()	Returns number of bytes retained by this instance in memory including over-allocations.
long	getSizeInBytes()	Returns the size of memory in bytes used by this appender.

Methods inherited from class java.lang.Object

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

Constructor Details

RleAwarePositionsAppender

public RleAwarePositionsAppender(BlockTypeOperators.BlockPositionIsDistinctFrom isDistinctFromOperator,
 PositionsAppender delegate)

Method Details

append

public void append(it.unimi.dsi.fastutil.ints.IntArrayList positions,
 Block source)

Specified by:

append in interface PositionsAppender

appendRle

public void appendRle(Block value,
 int positionCount)

Description copied from interface: PositionsAppender

Appends the specified value positionCount times. The result is the same as with using PositionsAppender.append(IntArrayList, Block) with positions list [0...positionCount -1] but with possible performance optimizations.

Specified by:

appendRle in interface PositionsAppender

append

public void append(int position,
 Block value)

Description copied from interface: PositionsAppender

Appends single position. The implementation must be conceptually equal to append(IntArrayList.wrap(new int[] {position}), source) but may be optimized. Caller should avoid using this method if PositionsAppender.append(IntArrayList, Block) can be used as appending positions one by one can be significantly slower and may not support features like pushing RLE through the appender.

Specified by:

append in interface PositionsAppender

build

public Block build()

Description copied from interface: PositionsAppender

Creates the block from the appender data. After this, appender is reset to the initial state, and it is ready to build a new block.

Specified by:

build in interface PositionsAppender

getRetainedSizeInBytes

public long getRetainedSizeInBytes()

Description copied from interface: PositionsAppender

Returns number of bytes retained by this instance in memory including over-allocations.

Specified by:

getRetainedSizeInBytes in interface PositionsAppender

getSizeInBytes

public long getSizeInBytes()

Description copied from interface: PositionsAppender

Returns the size of memory in bytes used by this appender.

Specified by:

getSizeInBytes in interface PositionsAppender