org.apache.drill.exec.record.selection

Class SelectionVector2

java.lang.Object

org.apache.drill.exec.record.selection.SelectionVector2

All Implemented Interfaces:

AutoCloseable

public class SelectionVector2
extends Object
implements AutoCloseable

A selection vector that fronts, at most, 64K values. The selection vector is used for two cases:

1. To create a list of values retained by a filter.
2. To provide a redirection level for sorted batches.

Field Summary

Fields

Modifier and Type	Field and Description
static int	RECORD_SIZE

Constructor Summary

Constructors

Constructor and Description
SelectionVector2(BufferAllocator allocator)
SelectionVector2(BufferAllocator allocator, DrillBuf buf, int count) Create a selection vector with the given buffer.
SelectionVector2(BufferAllocator allocator, DrillBuf buf, int count, int actualRecordCount)

Method Summary

Modifier and Type	Method and Description
void	allocateNew(int size)
boolean	allocateNewSafe(int size)
boolean	canDoFullTransfer()
void	clear()
SelectionVector2	clone()
void	close()
int	getBatchActualRecordCount()
DrillBuf	getBuffer()
DrillBuf	getBuffer(boolean clear)
int	getCount()
long	getDataAddr()
char	getIndex(int index)
void	setBatchActualRecordCount(int actualRecordCount)
void	setBuffer(DrillBuf bufferHandle)
void	setIndex(int index, int value)
void	setRecordCount(int recordCount)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

RECORD_SIZE

public static final int RECORD_SIZE

See Also:

Constant Field Values

Constructor Detail

SelectionVector2

public SelectionVector2(BufferAllocator allocator)

SelectionVector2

public SelectionVector2(BufferAllocator allocator,
                        DrillBuf buf,
                        int count)

Create a selection vector with the given buffer. The selection vector increments the buffer's reference count, talking ownership of the buffer.

Parameters:

allocator - allocator used to allocate the buffer

buf - the buffer containing the selection vector's data

count - the number of values in the selection vector

SelectionVector2

public SelectionVector2(BufferAllocator allocator,
                        DrillBuf buf,
                        int count,
                        int actualRecordCount)

Method Detail

getCount

public int getCount()

getBuffer

public DrillBuf getBuffer()

getBuffer

public DrillBuf getBuffer(boolean clear)

setBuffer

public void setBuffer(DrillBuf bufferHandle)

getIndex

public char getIndex(int index)

getDataAddr

public long getDataAddr()

setIndex

public void setIndex(int index,
                     int value)

allocateNewSafe

public boolean allocateNewSafe(int size)

allocateNew

public void allocateNew(int size)

clone

public SelectionVector2 clone()

Overrides:

clone in class Object

clear

public void clear()

setRecordCount

public void setRecordCount(int recordCount)

canDoFullTransfer

public boolean canDoFullTransfer()

setBatchActualRecordCount

public void setBatchActualRecordCount(int actualRecordCount)

getBatchActualRecordCount

public int getBatchActualRecordCount()

close

public void close()

Specified by:

close in interface AutoCloseable

toString

public String toString()

Overrides:

toString in class Object