Quadcap Embeddable Database

com.quadcap.sql.index.BCursor Interface Reference

Inheritance diagram for com.quadcap.sql.index.BCursor:

List of all members.

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Detailed Description

BCursor.

Author:

Stan Bailes

Definition at line 48 of file BCursor.java.

Public Member Functions
boolean	seek (byte[] key, int len) throws IOException
	Seek to (before) the specified key.
Package Functions
boolean	seek (byte[] buf) throws IOException
	Seek to (before) the specified key.
void	beforeFirst () throws IOException
	Position cursor before the first record.
void	afterLast () throws IOException
	Position the cursor after the last record.
boolean	absolute (int x) throws IOException
	Move to the specified record; one-based.
boolean	next () throws IOException
	Move past the next record and return true the cursor is now pointed at a valid record.
boolean	prev () throws IOException
	Move before the previous record and return true the cursor is now pointed at a valid record.
int	getKey (byte[] buf) throws IOException
byte[]	getKeyBuf ()
void	setKeyBuf (byte[] buf)
int	getKeyLen ()
byte[]	getKey ()
int	getVal (byte[] buf) throws IOException
byte[]	getValBuf ()
void	setValBuf (byte[] buf)
int	getValLen ()
byte[]	getVal ()
long	getValAsLong () throws IOException
long	size () throws IOException
long	position () throws IOException
void	release ()
	Release this cursor back to the pool.
void	close () throws IOException
	Release any resources held by this cursor (but maintain ownership of it -- it can be resurrected by another positioning call.
boolean	delete () throws IOException
	Delete the currently positioned record.
boolean	insert (byte[] key, int klen, byte[] data, int doff, int dlen) throws IOException
	Insert a new key/data pair.
boolean	insert (byte[] key, byte[] data) throws IOException
boolean	replace (byte[] data, int doff, int dlen) throws IOException
	Replace the data portion of the current item with the specified data.
boolean	replace (byte[] data) throws IOException

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Member Function Documentation

boolean com.quadcap.sql.index.BCursor.absolute (  int  x  )  throws IOException [package]

Move to the specified record; one-based. -1 means last record, -2 means next to last, etc. Returns: true if the specified record exists. Implemented in com.quadcap.sql.index.BtreeCursor.

void com.quadcap.sql.index.BCursor.afterLast (   )  throws IOException [package]

Position the cursor after the last record. Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.IndexCursor.afterLast().

void com.quadcap.sql.index.BCursor.beforeFirst (   )  throws IOException [package]

Position cursor before the first record. Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.IndexCursor.beforeFirst(), com.quadcap.sql.UpdateIndex.finish(), and com.quadcap.sql.IndexCursor.reset().

void com.quadcap.sql.index.BCursor.close (   )  throws IOException [package]

Release any resources held by this cursor (but maintain ownership of it -- it can be resurrected by another positioning call. Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.index.Btree.releaseCursor().

boolean com.quadcap.sql.index.BCursor.delete (   )  throws IOException [package]

Delete the currently positioned record. Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.index.Btree.delete(), com.quadcap.sql.Database.getRelationNameIterator(), com.quadcap.sql.Database.removeRelation(), and com.quadcap.sql.Database.renameRelation().

byte [] com.quadcap.sql.index.BCursor.getKey (   )  [package]

Implemented in com.quadcap.sql.index.BtreeCursor.

int com.quadcap.sql.index.BCursor.getKey (  byte[]  buf  )  throws IOException [package]

Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.ExportedKeyConstraint.checkKeyRemoval(), com.quadcap.sql.index.Btree.display(), com.quadcap.sql.UpdateIndex.finish(), com.quadcap.sql.Database.getRelationNameIterator(), and com.quadcap.sql.IndexCursor.updateRow().

byte [] com.quadcap.sql.index.BCursor.getKeyBuf (   )  [package]

Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.IndexCursor.next(), and com.quadcap.sql.IndexCursor.prev().

int com.quadcap.sql.index.BCursor.getKeyLen (   )  [package]

Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.IndexCursor.next(), and com.quadcap.sql.IndexCursor.prev().

byte [] com.quadcap.sql.index.BCursor.getVal (   )  [package]

Implemented in com.quadcap.sql.index.BtreeCursor.

int com.quadcap.sql.index.BCursor.getVal (  byte[]  buf  )  throws IOException [package]

Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.index.Btree.display(), com.quadcap.sql.index.Btree.get(), com.quadcap.sql.Database.renameIndexedTable(), and com.quadcap.sql.Database.updateTableIdentity().

long com.quadcap.sql.index.BCursor.getValAsLong (   )  throws IOException [package]

Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.StmtDropTable.deleteRows(), com.quadcap.sql.StmtDropColumn.execute(), com.quadcap.sql.StmtAddColumn.execute(), com.quadcap.sql.Database.removeRelation(), and com.quadcap.sql.Database.updateRelation().

byte [] com.quadcap.sql.index.BCursor.getValBuf (   )  [package]

Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.TempTableMerge.addRows(), com.quadcap.sql.OrderByCursor.fetchCurrentRow(), com.quadcap.sql.DistinctCursor.fetchCurrentRow(), com.quadcap.sql.UpdateIndex.finish(), com.quadcap.sql.OrderByCursor.getCurrentRowId(), com.quadcap.sql.IndexCursor.getCurrentRowId(), com.quadcap.sql.DistinctCursor.getCurrentRowId(), com.quadcap.sql.Database.getRelation(), com.quadcap.sql.Database.getTableIdentity(), com.quadcap.sql.TempTable.release(), and com.quadcap.sql.Database.renameRelation().

int com.quadcap.sql.index.BCursor.getValLen (   )  [package]

Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.UpdateIndex.finish(), com.quadcap.sql.index.Btree.get(), and com.quadcap.sql.Database.getTableIdentity().

boolean com.quadcap.sql.index.BCursor.insert (  byte[]  key, byte[]  data )  throws IOException [package]

Implemented in com.quadcap.sql.index.BtreeCursor.

boolean com.quadcap.sql.index.BCursor.insert (  byte[]  key, int  klen, byte[]  data, int  doff, int  dlen )  throws IOException [package]

Insert a new key/data pair. We are presumably positioned just before the spot where the new record should go, but we will check, anyway. Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.Database.addRelation(), com.quadcap.sql.TempTableMerge.addRows(), com.quadcap.sql.Database.renameRelation(), and com.quadcap.sql.UnaryExpression.uniqueValue().

boolean com.quadcap.sql.index.BCursor.next (   )  throws IOException [package]

Move past the next record and return true the cursor is now pointed at a valid record. Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.ExportedKeyConstraint.checkKeyRemoval(), com.quadcap.sql.StmtDropTable.deleteRows(), com.quadcap.sql.index.Btree.display(), com.quadcap.sql.StmtDropColumn.execute(), com.quadcap.sql.StmtAddColumn.execute(), com.quadcap.sql.UpdateIndex.finish(), com.quadcap.sql.Database.getRelationNameIterator(), com.quadcap.sql.TempTable.release(), and com.quadcap.sql.Database.renameIndexedTable().

long com.quadcap.sql.index.BCursor.position (   )  throws IOException [package]

Implemented in com.quadcap.sql.index.BtreeCursor.

boolean com.quadcap.sql.index.BCursor.prev (   )  throws IOException [package]

Move before the previous record and return true the cursor is now pointed at a valid record. Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.Database.renameIndexedTable().

void com.quadcap.sql.index.BCursor.release (   )  [package]

Release this cursor back to the pool. Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.Database.addRelation(), com.quadcap.sql.TempTableMerge.addRows(), com.quadcap.sql.ExportedKeyConstraint.checkKeyRemoval(), com.quadcap.sql.index.Btree.delete(), com.quadcap.sql.StmtDropTable.deleteRows(), com.quadcap.sql.index.Btree.display(), com.quadcap.sql.StmtDropColumn.execute(), com.quadcap.sql.StmtAddColumn.execute(), com.quadcap.sql.UpdateIndex.finish(), com.quadcap.sql.index.Btree.get(), com.quadcap.sql.Database.getRelation(), com.quadcap.sql.Database.getRelationNameIterator(), com.quadcap.sql.Database.getTableIdentity(), com.quadcap.sql.TempTable.release(), com.quadcap.sql.Database.removeRelation(), com.quadcap.sql.Database.renameIndexedTable(), com.quadcap.sql.Database.renameRelation(), com.quadcap.sql.UnaryExpression.uniqueValue(), com.quadcap.sql.Database.updateRelation(), and com.quadcap.sql.Database.updateTableIdentity().

boolean com.quadcap.sql.index.BCursor.replace (  byte[]  data  )  throws IOException [package]

Implemented in com.quadcap.sql.index.BtreeCursor.

boolean com.quadcap.sql.index.BCursor.replace (  byte[]  data, int  doff, int  dlen )  throws IOException [package]

Replace the data portion of the current item with the specified data. Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.TempTableMerge.addRows(), com.quadcap.sql.Database.renameIndexedTable(), and com.quadcap.sql.Database.updateTableIdentity().

boolean com.quadcap.sql.index.BCursor.seek (  byte[]  buf  )  throws IOException [package]

Seek to (before) the specified key. Implemented in com.quadcap.sql.index.BtreeCursor.

boolean com.quadcap.sql.index.BCursor.seek (  byte[]  key, int  len )  throws IOException

Seek to (before) the specified key. Implemented in com.quadcap.sql.index.BtreeCursor. Referenced by com.quadcap.sql.Database.addRelation(), com.quadcap.sql.TempTableMerge.addRows(), com.quadcap.sql.IndexCursor.afterLast(), com.quadcap.sql.IndexCursor.beforeFirst(), com.quadcap.sql.ExportedKeyConstraint.checkKeyRemoval(), com.quadcap.sql.index.Btree.delete(), com.quadcap.sql.index.Btree.get(), com.quadcap.sql.Database.getRelation(), com.quadcap.sql.Database.getTableIdentity(), com.quadcap.sql.Database.removeRelation(), com.quadcap.sql.Database.renameRelation(), com.quadcap.sql.IndexCursor.reset(), com.quadcap.sql.UnaryExpression.uniqueValue(), com.quadcap.sql.Database.updateRelation(), and com.quadcap.sql.Database.updateTableIdentity().

void com.quadcap.sql.index.BCursor.setKeyBuf (  byte[]  buf  )  [package]

Implemented in com.quadcap.sql.index.BtreeCursor.

void com.quadcap.sql.index.BCursor.setValBuf (  byte[]  buf  )  [package]

Implemented in com.quadcap.sql.index.BtreeCursor.

long com.quadcap.sql.index.BCursor.size (   )  throws IOException [package]

Implemented in com.quadcap.sql.index.BtreeCursor.