[debian-mysql] Bug#1142408: Bug#1142408: mysql-9.7: No upgrade path from 8.0.46

[nick black]

> It is so long ago I last saw a MySQL 8.0 instance that I don't recall
> the upgrade details, but in general upgrades from MySQL 5.5, 5.6, 5.7
> and 8.0 start having more divergence, and in-place upgrades no longer
> work for 8.4+. I recommend taking a backup, restoring the backup to a
> test machine and trying it out before doing it in production.

i performed the migration from debian's mysql 8.0 to mariadb 
11.8.8 this evening. it was definitely not handsfree, but it 
wasn't difficult, either. i suffered about 25 minutes of 
downtime total, and am no database expert. everything seems to 
be working fine now.