Re: backward incompatible pg_basebackup and pg_receivexlog

On 19.03.2013 13:49, Magnus Hagander wrote:
> On Tue, Mar 19, 2013 at 11:39 AM, Heikki Linnakangas
> <hlinnakangas(at)vmware(dot)com> wrote:
>> On 19.03.2013 04:42, Peter Eisentraut wrote:
>>>
>>> Also, using the old tools against new server versions either behaves
>>> funny or silently appears to work, both of which might be a problem.
>>
>> Hmm, it would be good to fix that. I wonder how, though. The most
>> straightforward way would be to add an explicit version check in the
>> clients, in backbranches. That would give a nice error message, but that
>> would only help with new minor versions.
>
> Still better to do it in a backbranch, than not at all. At least we
> are then nicer to the ones that do keep up with upgrades, which we
> recommend they do...

Ok, here are patches for 9.1, 9.2 and master, to add explicit version
checks. Each branch has its own quirks. A 9.1 client should still work
with a 9.2 server, because we don't want to break things in a minor
version that used to accidentally work, even if it was never explicitly
supported. In master, I tweaked pg_basebackup so that it still works
with older servers if you don't use the "-X stream" option. The changes
to the streaming protocol only affected "-X stream".

This doesn't yet add the "streaming protocol version number" that was
discussed.

- Heikki