I cannot restart mysql
I executed mysql_upgrade -u root -p ,no works, and the mysqld.log errors become two:
181130 8:21:21 [ERROR] Incorrect definition of table mysql.proc: expected column 'sqlmode' at position 14 to...
I cannot restart mysql by using systemctl restart mysql, and /var/log/mysqld.err shows:
```
181122 4:47:33 [Note] /usr/sbin/mysqld: Normal shutdown
181122 4:47:34 InnoDB: Starting shutdown...
181122 4:47:35 InnoD...