[debian-mysql] serg wants easy upgrades [was Re: MariaDB status in NEW queue?]

[Clint Byrum]

Excerpts from Sergei Golubchik's message of 2013-12-16 02:31:22 -0800:
> Hi, Colin!
> 
> On Dec 16, Colin Charles wrote:
> > On 13 Dec 2013, at 22:59, Clint Byrum <spamaps at debian.org> wrote:
> > >> 
> > > Will 10.0 retain on-disk compatibility with the other flavors? If not,
> > > then it sounds like a 1-way trip.. so I'm a little dubious about trying
> > > to keep them both installable. That would also necessitate owning its
> > > own datadir.
> > 
> > Yes, the InnoDB on-disk compatibility will be the same. So as long as
> > you don't use something that MySQL itself does not have (say dynamic
> > columns), the on-disk compatibility is the same (so definitely not a
> > 1-way trip!)
> 
> Dynamic columns are fine, they don't affect on-disk compatibility.
> Temporal types with microseconds are not, though.

IMO this _is_ a 1-way trip if there is any possibility that the user
will have to manually alter their tables to go back to MySQL-compatible
formats.

I think everybody will be happier if we just split the datadirs up for
10.0. We can still offer to the user to copy the data from mysql when
10.0 is first installed.