优化 SHOW COLUMNS FROM
https://www.cnblogs.com/xdtx/p/9185914.html
http://www.thinkphp.cn/topic/37558.html
php think optimize:schema
https://www.kancloud.cn/manual/thinkphp5/211524
ThinkPHP5 常用命令
https://blog.csdn.net/qq_19004627/article/details/81003189