Something

QueryResult *result = sDatabase.PQuery("SELECT `in_arena` FROM `pvp_cmd_data` WHERE `id` = '%d'", chr->GetGUIDLow());
    if(result)
    {
		Field *fields = result->Fetch();
		uint32 inarena = fields[0].GetUInt32();
		if (inarena == 1)
		{
		sDatabase.PExecute( "UPDATE SET `time` =%d WHERE `playerid`= %d", time(NULL), chr->GetGUIDLow());
		sDatabase.PExecute( "UPDATE SET `in_arena` =0 WHERE `playerid`= %d", chr->GetGUIDLow());
        SendSysMessage("You did not leave the arena, restting cooldown");
        return true;
		}