QSqlDatabase with MYSQL management in the app

[Cobra91151]

@SGaist

I don't have any member variable, only local variable QSqlDatabase db = QSqlDatabase::database("TestConnection"); to get the DB connection and use it to execute queries. It should deletes itself when it goes out of scope. So I think no QSqlDatabase objects are lying around.

More info available - warning remove database

[SGaist]

The correct way is described in the documentation of the function:

void someFunction()
{
    {
        QSqlDatabase db = QSqlDatabase::database("sales");
        QSqlQuery query("SELECT NAME, DOB FROM EMPLOYEES", db);
    }
    // Both "db" and "query" are destroyed because they are out of scope 
    QSqlDatabase::removeDatabase("sales"); // correct
}