TableScanCursor Class Reference

#include <TableCursors.h>

Inherits Table::Cursor.

List of all members.

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Detailed Description

Cursor that takes a where clause, and scans a table for matching tuples.

Public Member Functions
bool	avail () const
	Returns true iff there are more rows..
const char *	rowData () const
	Returns a pointer to the data of the current row.
virtual void	deleteRow () const
	Delete the current row from the database.
virtual void	setTuple (const char *tuple)
	Set the input tuple in this cursors internal context.
virtual void	reset ()
	Point the cursor at the first valid row.
virtual TableScanCursor &	operator++ ()
	Move forward to the next valid row Set that row data as the index 1 duple in the eval context.
virtual string	as_string () const
	String representation of this cursor.
	TableScanCursor (Table *table, ptr< Expression > where_clause)
virtual	~TableScanCursor ()
	Close the database cursor on destruction.
Static Public Member Functions
ptr< TableScanCursor >	factory (Table *table, ptr< SQLWhereClause > wc)

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Constructor & Destructor Documentation

TableScanCursor::TableScanCursor (  Table *  table, ptr< Expression >  where_clause )

virtual TableScanCursor::~TableScanCursor (   )  [virtual]

Close the database cursor on destruction. TODO: Some kind of pool of these, maybe.

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Member Function Documentation

virtual string TableScanCursor::as_string (   )  const [virtual]

String representation of this cursor. Reimplemented from Table::Cursor.

bool TableScanCursor::avail (   )  const [virtual]

Returns true iff there are more rows.. Implements Table::Cursor.

virtual void TableScanCursor::deleteRow (   )  const [virtual]

Delete the current row from the database. Valid only if avail(). Implements Table::Cursor.

ptr< TableScanCursor > TableScanCursor::factory (  Table *  table, ptr< SQLWhereClause >  wc )  [static]

virtual TableScanCursor& TableScanCursor::operator++ (   )  [virtual]

Move forward to the next valid row Set that row data as the index 1 duple in the eval context. Implements Table::Cursor.

virtual void TableScanCursor::reset (   )  [virtual]

Point the cursor at the first valid row. This will need to be called before the cursor is valid after construction. Implements Table::Cursor.

const char* TableScanCursor::rowData (   )  const [virtual]

Returns a pointer to the data of the current row. Valid only if avail(). Implements Table::Cursor.

virtual void TableScanCursor::setTuple (  const char *  tuple  )  [virtual]

Set the input tuple in this cursors internal context. Must be called before reset, if the cursor is going to use data from the input tuple. Implements Table::Cursor.

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The documentation for this class was generated from the following files:

• TableCursors.h
• TableCursors.cc

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