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sql/overview/navigating/main.cpp Example File

/****************************************************************************
** $Id$
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of an example program for Qt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/

#include <qapplication.h>
#include <qsqldatabase.h>
#include <qsqlquery.h>
#include "../login.h"

bool createConnections();


int main( int argc, char *argv[] )
{
    QApplication app( argc, argv );

    if ( createConnections() ) {
        QSqlQuery query( "SELECT id, name FROM people ORDER BY name;" );
        if ( ! query.isActive() ) return 1; // Query failed
        int i;
        i = query.size();               // In this example we have 9 records; i == 9.
        query.first();                  // Moves to the first record.
        i = query.at();                 // i == 0
        query.last();                   // Moves to the last record.
        i = query.at();                 // i == 8
        query.seek( query.size() / 2 ); // Moves to the middle record.
        i = query.at();                 // i == 4
    }

    return 0;
}


bool createConnections()
{

    QSqlDatabase *defaultDB = QSqlDatabase::addDatabase( DB_SALES_DRIVER );
    if ( ! defaultDB ) {
        qWarning( "Failed to connect to driver" );
        return FALSE;
    }
    defaultDB->setDatabaseName( DB_SALES_DBNAME );
    defaultDB->setUserName( DB_SALES_USER );
    defaultDB->setPassword( DB_SALES_PASSWD );
    defaultDB->setHostName( DB_SALES_HOST );
    if ( ! defaultDB->open() ) {
        qWarning( "Failed to open sales database: " +
                  defaultDB->lastError().driverText() );
        qWarning( defaultDB->lastError().databaseText() );
        return FALSE;
    }

    QSqlDatabase *oracle = QSqlDatabase::addDatabase( DB_ORDERS_DRIVER, "ORACLE" );
    if ( ! oracle ) {
        qWarning( "Failed to connect to oracle driver" );
        return FALSE;
    }
    oracle->setDatabaseName( DB_ORDERS_DBNAME );
    oracle->setUserName( DB_ORDERS_USER );
    oracle->setPassword( DB_ORDERS_PASSWD );
    oracle->setHostName( DB_ORDERS_HOST );
    if ( ! oracle->open() ) {
        qWarning( "Failed to open orders database: " +
                  oracle->lastError().driverText() );
        qWarning( oracle->lastError().databaseText() );
        return FALSE;
    }

    return TRUE;
}