public function getTables($resultDetail = false)
    {
        $this->connect();
        $list = [];
        foreach ($this->tables as $db_name=>$tables)
        {
            foreach ($tables as $table_name=>$nodes)
            {

                if ($resultDetail)
                {
                    $list[$db_name . '.' . $table_name] = $nodes;
                } else
                {
                    $list[$db_name . '.' . $table_name] = array_keys($nodes);
                }
            }
        }
        return $list;
    }