Well, the purpose of php-mysql package is to interact with MySQL server. And in order to do that, it has to connect to the server.

caching_sha2_password is the default authentication method in MySQL 8.0. MySQL 8.0 is the current GA version. So this package is COMPLETELY unusable, unless someone downgrade MySQL server or change its default security settings. I think this perfectly fits the definition of a grave bug. And a regression.

grave
    makes the package in question unusable or mostly so

Are packages not working out-of-the-box after installation the experience Debian wants to provide?

On 2018-10-06 06:34, Ondřej Surý wrote:
Control: severity -1 important

That’s not a grave bug. Please do not abuse severities.

Ondřej
--
Ondřej Surý <ond...@sury.org>

On 6 Oct 2018, at 01:23, Piotr Jurkiewicz <piotr.jerzy.jurkiew...@gmail.com> 
wrote:

Package: php7.3-mysql
Version: 7.3.0~rc2-2
Severity: grave

After update to 7.3.0~rc2-2 (sid), mysqli extension stopped working. It can't 
connect to MySQL server, giving the following error message:

PHP message: PHP Warning:  mysqli::__construct(): The server requested 
authentication method unknown to the client [caching_sha2_password]

It worked before the update (version 7.3.0~alpha3-1, I think).

caching_sha2_password is the default authentication method in MySQL 8.0.



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