[mythtv] Upgrade database from command line

Thomas Mashos thomas at mashos.com
Mon Sep 8 17:23:41 UTC 2014

On Mon, Sep 8, 2014 at 3:56 AM, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 09/08/2014 04:49 AM, Grant Gardner wrote:
>> If I've read the code correctly current trunk can go back as far as
>> 0.24, and 0.24-fixes can go back as far as 0.14
>> See - https://code.mythtv.org/trac/ticket/504
> No, current trunk can upgrade any MythTV database from MythTV version 0.22
> or higher, where 0.22 was released on Nov 6, 2009 (so, basically 5 years
> ago).   So people running versions of MythTV > 5yrs old (where the
> most-recent version before 0.22, 0.21, was released in Mar 2008--6 1/2yrs
> ago), have to upgrade from their pre-0.22 version to 0.22, 0.23, or 0.24 to
> upgrade to a database version that the current MythTV version can upgrade.
> Everyone else can just upgrade directly to the current version.
> IMHO, if you're running a version of MythTV that's 6 1/2 years old or older,
> your needing to take an extra step to upgrade to modern MythTV isn't asking
> too much--since you skipped upgrading for >5yrs.  And, besides, before
> upgrading, people really need to read all the release notes for every
> version between their version and the version to which they're upgrading to
> ensure they configure for the changes that have occurred since.
> Besides, if you're running a version of MythTV that's 6 1/2 years old, it
> seems MythTV isn't that critical to you, so the other option is to just
> install a new version and start a new database.

One might argue that not doing any MythTV major version upgrades in 6
1/2 years is actually because MythTV is so critical. I'm not one of
those people, but I could see the argument.

> This is why I'm of the opinion that just having one database upgrade utility
> is the way to go.  I do like the idea of a command-line upgrade (and planned
> to modify MythTV to allow it).  I just don't think we need any kind of
> "upgrade any MythTV database version to any other" support--especially since
> there's a /very/ good reason we dropped support for upgrading from pre-0.22
> database versions (because the code that does so doesn't work properly with
> modern Qt and Qt-MySQL drivers, so it may fail or--worse--silently corrupt
> the data).
> Mike
> _______________________________________________


Thomas Mashos

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