以前はパスワードカラムがあったという事実

https://yoku0825.blogspot.jp/2015/03/mysql-576mysqluser.html

mysql> SELECT user, host, password FROM mysql.user;
+--------+--------------+-------------------------------------------+
| user   | host         | password                                  |
+--------+--------------+-------------------------------------------+
| root   | localhost    | *2AF14BD74D8A4FDB580D3208C0092BE75EE95B75 |
| root   | dd51374b09e7 | *2AF14BD74D8A4FDB580D3208C0092BE75EE95B75 |
| root   | 127.0.0.1    | *2AF14BD74D8A4FDB580D3208C0092BE75EE95B75 |
| root   | ::1          | *2AF14BD74D8A4FDB580D3208C0092BE75EE95B75 |
| fabric | %            | *BA4015F6659FB2A40463B9728083556079C45EE7 |
| app    | %            | *07C85F556938C8B845F807BCD7EA0B7A296072DC |
+--------+--------------+-------------------------------------------+
6 rows in set (0.11 sec)

バージョンアップでなくなった模様です。

https://dev.mysql.com/doc/refman/5.7/en/grant-tables.html


"The user table plugin, Password, and authentication_string columns store authentication plugin and credential information. In MySQL 5.7.6, the Password column was removed and all credentials are stored in the authentication_string column. "

MySQL5.7が境目

MySQL 5.7にやられないためにおぼえておいてほしいこと from yoku0825