https://tech.meituan.com/innodb-lock.html
https://www.jianshu.com/p/4e3edbedb9a8
15.2.10 . InnoDB事务模型和锁定
http://www.iteedu.com/database/mysql/mysqlmanualcn/storage-engines/innodb-transaction-model.php
https://tech.meituan.com/innodb-lock.html
https://www.jianshu.com/p/4e3edbedb9a8
http://www.iteedu.com/database/mysql/mysqlmanualcn/storage-engines/innodb-transaction-model.php