Tabular DataStream protocol 协议
Freetds 创建过程
https://wenku.baidu.com/view/2076cbfaaef8941ea76e0576.html
高效连接Mysql的PDO和ADODB是当今世界最快的数据库抽象类
http://blog.163.com/lgh_2002/blog/static/440175262010739336470/
php+sqlrelay+mysql实现连接池及读写负载均衡
http://blog.163.com/lgh_2002/blog/static/4401752620107393057989/
php是不是一定要和mysql连接，oracle 、sql server行不行
https://segmentfault.com/q/1010000007292634/a-1020000007301956
url download:
https://github.com/tds-fdw/tds_fdw
https://github.com/mclap/tdsproxy
https://github.com/bearice/tdsrelay
https://github.com/devinsmith/tds_uv
https://github.com/c-wind/tdss
https://github.com/MilitiaSoftworks/FreeTDS-Swiftmodule
https://github.com/Thundzz/GPU