Kako da proverim da li je tabela prazna?

forward GetHighFactionID();
public GetHighFactionID()
{
	new DB_Query;
	new RowResult;
	new i;
	
	if(cache_num_rows() > 0)
	{
		cache_get_value_index_int(0, 0, RowResult);
			
		if(RowResult > 0)
		{
			for(i = 1; i <= RowResult; i++)
			{
                                  // dalje kod
			}
		}						
	}
	
	return 1;
}

 cache_get_value_index_int: value 'NULL' is not a number

DB_Load_Factions()
{
    new DB_Query;

	mysql_format(Database, DB_Query, sizeof(DB_Query), "SELECT MAX(ID) FROM `FACTIONS`");
	mysql_tquery(Database, DB_Query, "GetHighFactionID"); 

    return 1;
}