标准的深度优先搜索算法，可实现节点遍历、产生随机路由、检测图中是否有回路等功能，-Standard depth-first search algorithm, the node traversal can be achieved, resulting in a random routing, testing whether there is any loop diagram functions
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003145s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.114553s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001372s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003985s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001236s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005297s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001387s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003801s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016841s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.005900s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 343735 [ RunTime:0.014632s ]
