Package io.trino.operator

Class RowReferencePageManager.LoadCursor

java.lang.Object

io.trino.operator.RowReferencePageManager.LoadCursor

All Implemented Interfaces:

RowReference, AutoCloseable

Enclosing class:

RowReferencePageManager

public static final class RowReferencePageManager.LoadCursor
extends Object
implements RowReference, AutoCloseable

Cursor that allows callers to advance through the registered page and dictate whether a specific position should be preserved with a stable row ID. Row ID generation can be expensive in tight loops, so this allows callers to quickly skip positions that won't be needed.

Method Summary

Modifier and Type	Method	Description
boolean	advance()
long	allocateRowId()	Allocate a stable row ID that can be used to reference this row at a future point.
void	close()
int	compareTo(RowIdComparisonStrategy strategy, long rowId)	Compares the referenced row to the specified row ID using the provided RowIdComparisonStrategy.
boolean	equals(RowIdHashStrategy strategy, long rowId)	Checks equality of the referenced row with the specified row ID using the provided RowIdHashStrategy.
long	hash(RowIdHashStrategy strategy)	Calculates the hash of the referenced row using the provided RowIdHashStrategy.

Methods inherited from class java.lang.Object

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

Method Details

advance

public boolean advance()

compareTo

public int compareTo(RowIdComparisonStrategy strategy,
 long rowId)

Description copied from interface: RowReference

Compares the referenced row to the specified row ID using the provided RowIdComparisonStrategy.

Specified by:

compareTo in interface RowReference

equals

public boolean equals(RowIdHashStrategy strategy,
 long rowId)

Description copied from interface: RowReference

Checks equality of the referenced row with the specified row ID using the provided RowIdHashStrategy.

Specified by:

equals in interface RowReference

hash

public long hash(RowIdHashStrategy strategy)

Description copied from interface: RowReference

Calculates the hash of the referenced row using the provided RowIdHashStrategy.

Specified by:

hash in interface RowReference

allocateRowId

public long allocateRowId()

Description copied from interface: RowReference

Allocate a stable row ID that can be used to reference this row at a future point.

Specified by:

allocateRowId in interface RowReference

close

public void close()

Specified by:

close in interface AutoCloseable