maria-developers team mailing list archive

[Lawrin Novitsky <lawrin.novitsky@xxxxxxxxxxx>]

Hi,

Hello,

25.06.2019 15:52, Michal Schorm пише:
> Hello,
>
> I am a Fedora packager and I'd like to make myself sure on some
> assumptions I made.
> Just to make sure in the following conversation:
> *  I understand "Connector C 3.1.2" as "major version number . minor
> version number . release number (or sometimes refered as patch
> number)".
> * In Fedora we use dynamic libraries and dynamic linking whenever
> possible. We are building the CONC/ODBC on top of CONC/C.
>
>
> 1) ABI & API compatibility
> I assume, the major versions are fully API & ABI (backward)
> compatible. That means to me it is safe to upgrade to later versions
> of the same major version number when using end-user application.
> There's no need to rebuild the end-user app.
>
> "The MariaDB Connector/ODBC 3.1 series is built on top of MariaDB
> Connector/C 3.x"
> That means to me I can build the CONC/ODBC 3.1 on top of CONC/C 3.0
> and there's no need for rebuild, when I upgrade to the CONC/C 3.1.
> Thus it is safe to upgrade withing one major version without any threat.

Exactly.

Btw, first C/ODBC releases used 3.0 only because C/C 3.1 wasn't GA to 
the moment. The next 3.1 release will already be using.

> That means to me I can update the package in Fedora mid release.
> During a lifetime of a Fedora release (let's say Fedora 30), I only
> update packages which won't break ABI & API compatibility. If there
> would be potential risk, I would push that update only to the next
> Fedora release (developement branch - Fedora Rawhide). That's what I
> do e.g. with minor versions of MariaDB server. I won't update the 10.3
> to 10.4 in the lifetime of one release, but prepare the 10.4 to the
> next release. (Fedora Rawhide)
>
> Am I right with above assumptions? Can I safely upgrade within one
> major version of the C and ODBC connectors and don't need rebuild of
> the dependant packages and end-user apps?
> If not, why was CONC/ODBC 3.0 discontinued and hidden?

Should be always safe with ODBC. With C/C everything is possible, and 
that is basically why 2.3 is still maintained.

But 3.0 is discontinues since we believe 3.1 is complete and safe 
replacement for it.

> 2) Version upgrade
> Is there any reason to use other than latest GA release of those connectors?
> (e.g. to use CONC/C 3.0 series instead of 3.1 series)
> Perhaps when using against different MariaDB server major versions?

No. And again - that is why 3.0 is discontinued.

> I assume there is not.
> If there is, again - why was CONC/ODBC 3.0 discontinued and hidden?

Looks like all your assumptions were correct.

Best regards,

Lawrin

> --
>
> Michal Schorm
> Software Engineer
> Core Services - Databases Team
> Red Hat
>
> --
>
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