5月20日的蘑菇云开放夜我们邀请到RT-Thread开源技术社区负责人Henson分享物联网操作系统RT-Thread的发展之路。近年来，物联网（Internet Of Things，IoT）概念广为普及，物联网市场发展迅猛，嵌入式设备的联网已是大势所趋。本期开放夜Henson现场分享RT-Thread的由来、应用场景以及一些行业上 的应用案例。介绍了RT-Thread的生态建设以及其在开源领域做的事情。最后互动提问环节，Henson回答了线上线下小伙伴的各种问题。
[ DB ] CONNECT:[ UseTime:0.003964s ] pgsql:dbname=cnpwd;host=127.0.0.1;port=5432
[ SQL ] select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg('yf_photos'); [ RunTime:0.033355s ]
[ SQL ] SELECT * FROM yf_photos WHERE id = 4946 AND status = 4 LIMIT 1 [ RunTime:0.003269s ]
[ SQL ] select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg('yf_collect'); [ RunTime:0.006151s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM yf_collect WHERE user_id IS NULL AND goods_id = 4946 AND kind = 4 LIMIT 1 [ RunTime:0.002138s ]
[ SQL ] UPDATE yf_photos SET count_click=count_click+1 WHERE id = 4946 AND status = 4 [ RunTime:0.003177s ]
[ SQL ] select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg('yf_user_info'); [ RunTime:0.008111s ]
[ SQL ] SELECT * FROM yf_user_info WHERE user_id = 471 AND kind = 1 LIMIT 1 [ RunTime:0.002187s ]
[ SQL ] select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg('yf_venue'); [ RunTime:0.021676s ]
[ SQL ] SELECT * FROM yf_venue WHERE user_id = 471 AND status = 5 AND start_time <= 1768362837 AND end_time >= 1768362837 ORDER BY recommend DESC,istop DESC,count_click DESC,id DESC LIMIT 1 [ RunTime:0.002955s ]
[ SQL ] SELECT a.*,b.name as user_name,b.avatar as user_avatar FROM yf_photos a LEFT JOIN yf_user_info b ON b.user_id=a.user_id AND b.kind = a.kind WHERE a.id <> 4946 AND a.kind_pid = 4 AND a.city = 19 AND a.status = 4 ORDER BY a.istop DESC,a.count_click DESC,a.id DESC LIMIT 6 [ RunTime:0.009189s ]
[ SQL ] select fields_name as "field",fields_type as "type",fields_not_null as "null",fields_key_name as "key",fields_default as "default",fields_default as "extra" from table_msg('yf_tag_list'); [ RunTime:0.003960s ]
[ SQL ] SELECT tag_id, MAX(tag_name) as tag_name, MAX(kind) as kind FROM yf_tag_list WHERE kind = 4 GROUP BY tag_id LIMIT 80 [ RunTime:0.003699s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 1269 AND kind = 4 [ RunTime:0.001695s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 1249 AND kind = 4 [ RunTime:0.002721s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 1245 AND kind = 4 [ RunTime:0.004889s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 4628 AND kind = 4 [ RunTime:0.004031s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 4904 AND kind = 4 [ RunTime:0.003995s ]
[ SQL ] SELECT * FROM yf_tag_list WHERE detail_id = 299 AND kind = 4 [ RunTime:0.003588s ]
