std.database design suggestion

[bls]

-- Sorry for posting on D.announce --

Hi, what do you people think about using the GoF
Factory (design) pattern ?
F.I.

abstract class Database {

     //common database stuff
     public abstract void connect(string user, string pw);
     // execSql(); prepare() etc...
}

abstract class DatabaseFactory {

    public abstract Database GetDatabase();
}

class PostgreSQL:Database {

     // common
    public override void connect(string user, string pw) {

    }
    //PostgreSQL specific
    public void funkyPGstuff() {}
}

class PostreSQLFactory:DatabaseFactory {

    public override Database GetDatabase() {

       return new PostgreSQL();

    }
}

class MySQL:Database {

     // common
    public override void connect(string user, string pw) {

    }
    //MySQL specific
    public void funkyMySQLstuff() {}
}

class MySQLFactory:DatabaseFactory {

    public override Database GetDatabase() {

       return new MySQL();

    }
}