[Bug 1853818] Re: utf8 non ascii characters are not accepted as input of the mysql command line

[Andreas Hasenack]

I get the expected result with your select test:
ubuntu at bionic-mysql:~$ mysql --version
mysql  Ver 14.14 Distrib 5.7.28, for Linux (x86_64) using  EditLine wrapper
ubuntu at bionic-mysql:~$ sudo mysql -uroot
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.28-0ubuntu0.18.04.4 (Ubuntu)

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights
reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input
statement.

mysql> SELECT "é" AS letter;
+--------+
| letter |
+--------+
| é      |
+--------+
1 row in set (0.00 sec)

mysql>

Maybe your locale is set incorrectly?
Here is mine in that test system:
ubuntu at bionic-mysql:~$ locale
LANG=C.UTF-8
LANGUAGE=
LC_CTYPE="C.UTF-8"
LC_NUMERIC="C.UTF-8"
LC_TIME="C.UTF-8"
LC_COLLATE="C.UTF-8"
LC_MONETARY="C.UTF-8"
LC_MESSAGES="C.UTF-8"
LC_PAPER="C.UTF-8"
LC_NAME="C.UTF-8"
LC_ADDRESS="C.UTF-8"
LC_TELEPHONE="C.UTF-8"
LC_MEASUREMENT="C.UTF-8"
LC_IDENTIFICATION="C.UTF-8"
LC_ALL=


** Changed in: mysql-5.7 (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1853818

Title:
  utf8 non ascii characters are not accepted as input of the mysql
  command line

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