org.h2.engine
Class UndoLogRecord

java.lang.Object
  org.h2.engine.UndoLogRecord

public class UndoLogRecord
extends java.lang.Object

An entry in a undo log.

Field Summary

static short	DELETE Operation type meaning the row was deleted.
static short	INSERT Operation type meaning the row was inserted.

Constructor Summary

UndoLogRecord(Table table, short op, Row row)
Create a new undo log record

Method Summary

void	commit() This method is called after the operation was committed.
long	getFilePos() Get the position in the file.
Row	getRow() Get the row that was deleted or inserted.
Table	getTable() Get the table.
void	undo(Session session) Un-do the operation.

Methods inherited from class java.lang.Object

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

Field Detail

INSERT

public static final short INSERT

Operation type meaning the row was inserted.

See Also:

Constant Field Values

DELETE

public static final short DELETE

Operation type meaning the row was deleted.

See Also:

Constant Field Values

Constructor Detail

UndoLogRecord

public UndoLogRecord(Table table,
                     short op,
                     Row row)

Create a new undo log record

Parameters:

table - the table

op - the operation type

row - the row that was deleted or inserted

Method Detail

undo

public void undo(Session session)

Un-do the operation. If the row was inserted before, it is deleted now, and vice versa.

Parameters:

session - the session

getTable

public Table getTable()

Get the table.

Returns:

the table

getFilePos

public long getFilePos()

Get the position in the file.

Returns:

the file position

commit

public void commit()

This method is called after the operation was committed. It commits the change to the indexes.

getRow

public Row getRow()

Get the row that was deleted or inserted.

Returns:

the row