In RHEL9 and RHEL10 we have mysql and mariadb databases and perl-DBD-MySQL and perl-DBD-MariaDB. This task is about investigation if there are risks or issues with real work. 

There are usages like:

• mysql with perl-DBD-MySQL
• mysql with perl-DBD-MariaDB
• mariadb with perl-DBD-MySQL (to some mariadb version)
• mariadb with perl-DBD-MariaDB

There are some potencial issues on the customer side with upgrade between these use cases.

Concrete problematic things:

• "Unicode Bug" described in https://metacpan.org/pod/DBD::mysql#DATABASE-HANDLES. How could this issue hit the customer?
• An issue like https://bugzilla.redhat.com/show_bug.cgi?id=2218970 that is not visibly resolved.
• perl-DBD-MySQL is not possible to use with the new versions of mariadb database. Risk in upgrade

Expected results:

• Document which describes the situation in a precise way.
• Part of the investigation will be some testing.
• Describe follow-ups like writing KB article to prevent risk situations