Package io.trino.operator

Class RowReferencePageManager

java.lang.Object

io.trino.operator.RowReferencePageManager

public final class RowReferencePageManager
extends Object

Page buffering manager that enables access to individual rows via stable row IDs. This allows computation to be built against these row IDs, while still enabling bulk memory optimizations such as compaction and lazy loading behind the scenes. Callers are responsible for explicitly de-referencing any rows that are no longer needed.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	RowReferencePageManager.LoadCursor	Cursor that allows callers to advance through the registered page and dictate whether a specific position should be preserved with a stable row ID.

Constructor Summary

Constructors

Constructor	Description
RowReferencePageManager()

Method Summary

Modifier and Type	Method	Description
RowReferencePageManager.LoadCursor	add(Page page)
RowReferencePageManager.LoadCursor	add(Page page, int startingPosition)
void	compactIfNeeded()
void	dereference(long rowId)
Page	getPage(long rowId)
int	getPosition(long rowId)
long	sizeOf()

Methods inherited from class java.lang.Object

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

Constructor Details

RowReferencePageManager

public RowReferencePageManager()

Method Details

add

public RowReferencePageManager.LoadCursor add(Page page)

add

public RowReferencePageManager.LoadCursor add(Page page,
 int startingPosition)

dereference

public void dereference(long rowId)

getPage

public Page getPage(long rowId)

getPosition

public int getPosition(long rowId)

compactIfNeeded

public void compactIfNeeded()

sizeOf

public long sizeOf()