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# qsqldriver.h

This is the verbatim text of the qsqldriver.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    **
    ** Definition of QSqlDriver class
    **
    ** Created : 2000-11-03
    **
    ** Copyright (C) 2005 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the sql module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition licenses may use this
    ** file in accordance with the Qt Commercial License Agreement provided
    ** with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    **********************************************************************/

    #ifndef QSQLDRIVER_H
    #define QSQLDRIVER_H

    #ifndef QT_H
    #include "qobject.h"
    #include "qptrdict.h"
    #include "qstring.h"
    #include "qsqlerror.h"
    #include "qsqlquery.h"
    #include "qsqlfield.h"
    #include "qsqlindex.h"
    #include "qstringlist.h"
    #include "qmap.h"
    #endif // QT_H

    #if !defined( QT_MODULE_SQL ) || defined( QT_LICENSE_PROFESSIONAL )
    #define QM_EXPORT_SQL
    #else
    #define QM_EXPORT_SQL Q_EXPORT
    #endif

    #ifndef QT_NO_SQL

    class QSqlDriverExtension;

    class QSqlDatabase;

    class QM_EXPORT_SQL QSqlDriver : public QObject
    {
        friend class QSqlDatabase;
        Q_OBJECT
    public:
        enum DriverFeature { Transactions, QuerySize, BLOB, Unicode, PreparedQueries,
    			 NamedPlaceholders, PositionalPlaceholders };

        QSqlDriver( QObject * parent=0, const char * name=0 );
        ~QSqlDriver();
        bool			isOpen() const;
        bool			isOpenError() const;

        virtual bool		beginTransaction();
        virtual bool		commitTransaction();
        virtual bool		rollbackTransaction();
        virtual QStringList		tables( const QString& tableType ) const;
        virtual QSqlIndex		primaryIndex( const QString& tableName ) const;
        virtual QSqlRecord		record( const QString& tableName ) const;
        virtual QSqlRecord		record( const QSqlQuery& query ) const;
        virtual QSqlRecordInfo	recordInfo( const QString& tablename ) const;
        virtual QSqlRecordInfo	recordInfo( const QSqlQuery& query ) const;
        virtual QString		nullText() const;
        virtual QString		formatValue( const QSqlField* field, bool trimStrings = FALSE ) const;
        QSqlError			lastError() const;

        virtual bool		hasFeature( DriverFeature f ) const = 0;
        virtual bool		open( const QString & db,
    				      const QString & user = QString::null,
    				      const QString & password = QString::null,
    				      const QString & host = QString::null,
    				      int port = -1 ) = 0;
        virtual void		close() = 0;
        virtual QSqlQuery		createQuery() const = 0;

        // ### remove for 4.0
        bool			open( const QString& db,
    				      const QString& user,
    				      const QString& password,
    				      const QString& host,
    				      int port,
    				      const QString& connOpts );
    protected:
        virtual void		setOpen( bool o );
        virtual void		setOpenError( bool e );
        virtual void		setLastError( const QSqlError& e );
    private:
        // ### This class needs a d-pointer in 4.0.
        int		          dbState;
        QSqlError	          error;
    #if defined(Q_DISABLE_COPY)
        QSqlDriver( const QSqlDriver & );
        QSqlDriver &operator=( const QSqlDriver & );
    #endif
    };

    #endif	// QT_NO_SQL
    #endif