Hi, Vicențiu,

There's a compromise approach - mariadb-upgrade is required (and thus
downgrade does not work) between major versions, but mariadb-upgrade is
not needed (and downgrade works) between minor versions.

So, again, to summarize:

Premise: if mariadb-upgrade is required between versions X and Y, the
downgrade from Y to X is impossible

* Option 1: mariadb-upgrade is never required, for any X and Y

* Option 2: mariadb-upgrade may be required for any X and Y

* Option 3: mariadb-upgrade is required when X and Y differ in the first
  two components and not required if they differ only in the third
  component

On Jul 28, Sergei Golubchik wrote:
> > 
> > Rather than offer a half-truth, I would us just take a clear stance.
> > We either fully support downgrading between minor versions
> > officially (which has implications on how we approach bug fixes,
> > especially on the storage side), or we don't even encourage it at
> > all, stating "at your own risk", or do a full dump and restore as
> > the only recovery method.
> 
> Yes, this is exactly what I meant in my email too.
> We should make a decision and then it will determine what we'll do.
> 
Regards,
Sergei
VP of MariaDB Server Engineering
and secur...@mariadb.org
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