PageBtreeIndex

This is the most common type of index, a b tree index. Only the data of the indexed columns are stored in the index.

Methods
static boolean	isMemoryChangeRequired() Check if calculating the memory is required.
static boolean	isMemoryChangeRequired() Check if calculating the memory is required. Returns: true if it is
void	add(Session session, Row row)
void	add(Session session, Row row)
boolean	canFindNext()
boolean	canFindNext()
boolean	canGetFirstOrLast()
boolean	canGetFirstOrLast()
void	checkRename()
void	checkRename()
void	close(Session session)
void	close(Session session)
Cursor	find(Session session, SearchRow first, SearchRow last)
Cursor	find(Session session, SearchRow first, SearchRow last)
Cursor	findFirstOrLast(Session session, boolean first)
Cursor	findFirstOrLast(Session session, boolean first)
Cursor	findNext(Session session, SearchRow first, SearchRow last)
Cursor	findNext(Session session, SearchRow first, SearchRow last)
double	getCost(Session session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, HashSet allColumnsSet)
double	getCost(Session session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, HashSet allColumnsSet)
long	getDiskSpaceUsed()
long	getDiskSpaceUsed()
int	getMemoryPerPage()
int	getMemoryPerPage()
PageBtree	getPage(int id) Read the given page.
PageBtree	getPage(int id) Read the given page. Parameters: id - the page id Returns: the page
PageStore	getPageStore()
PageStore	getPageStore()
Row	getRow(Session session, long key) Get a row from the main index.
Row	getRow(Session session, long key) Get a row from the main index. Parameters: session - the session key - the row key Returns: the row
long	getRowCount(Session session)
long	getRowCount(Session session)
long	getRowCountApproximation()
long	getRowCountApproximation()
int	getRowSize(Data dummy, SearchRow row, boolean onlyPosition) Get the size of a row (only the part that is stored in the index).
int	getRowSize(Data dummy, SearchRow row, boolean onlyPosition) Get the size of a row (only the part that is stored in the index). Parameters: dummy - a dummy data page to calculate the size row - the row onlyPosition - whether only the position of the row is stored Returns: the number of bytes
boolean	hasData(SearchRow row) Check whether the given row contains data.
boolean	hasData(SearchRow row) Check whether the given row contains data. Parameters: row - the row Returns: true if it contains data
void	memoryChange(int x) The memory usage of a page was changed.
void	memoryChange(int x) The memory usage of a page was changed. The new value is used to adopt the average estimated memory size of a page. Parameters: x - the new memory size
boolean	needRebuild()
boolean	needRebuild()
SearchRow	readRow(Data data, int offset, boolean onlyPosition, boolean needData) Read a row from the data page at the given offset.
SearchRow	readRow(Data data, int offset, boolean onlyPosition, boolean needData) Read a row from the data page at the given offset. Parameters: data - the data offset - the offset onlyPosition - whether only the position of the row is stored needData - whether the row data is required Returns: the row
SearchRow	readRow(long key) Get the complete row from the data index.
SearchRow	readRow(long key) Get the complete row from the data index. Parameters: key - the key Returns: the row
void	remove(Session session, Row row)
void	remove(Session session, Row row)
void	remove(Session session)
void	remove(Session session)
void	setRootPageId(Session session, int newPos) The root page has changed.
void	setRootPageId(Session session, int newPos) The root page has changed. Parameters: session - the session newPos - the new position
void	truncate(Session session)
void	truncate(Session session)
void	writeRow(Data data, int offset, SearchRow row, boolean onlyPosition) Write a row to the data page at the given offset.
void	writeRow(Data data, int offset, SearchRow row, boolean onlyPosition) Write a row to the data page at the given offset. Parameters: data - the data offset - the offset onlyPosition - whether only the position of the row is stored row - the row to write
void	writeRowCount()
void	writeRowCount()