[Misiur]

pawn Код:

for (new i = 0; i < MAX_VEHICLES; i++) {
    if (GetVehicleModel(i)) {
        format(szQuery, sizeof(szQuery), "SELECT `vid` FROM `vehicles` WHERE `vid` = '%d'", i);
        mysql_function_query(dbHandle, szQuery, true, "CheckExistVehicle", "d", i);
    }
}

This might be too heavy for your database to handle (remember that database query is the most time-and-resource-eating process). It'd be better if you loaded all data from database, and then worked on cached data