Re: pg_upgrade fails to detect unsupported arrays and ranges

> On 28 Apr 2021, at 22:47, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> Daniel Gustafsson <daniel@yesql.se> writes:
>>> On 28 Apr 2021, at 17:09, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>> +        pg_fatal("Your installation contains system-defined composite type(s) in user tables.\n"
>>> +                 "These type OIDs are not stable across PostgreSQL versions,\n"
>>> +                 "so this cluster cannot currently be upgraded.  You can\n"
>>> +                 "remove the problem tables and restart the upgrade.\n"
>>> +                 "A list of the problem columns is in the file:\n"
>
>> Would it be helpful to inform the user that they can alter/drop just the
>> problematic columns as a potentially less scary alternative to dropping the
>> entire table?
>
> This wording is copied-and-pasted from the other similar tests.  I agree
> that it's advocating a solution that might be overkill, but if we change
> it we should also change the existing messages.

Good point.

> I don't mind doing that in HEAD; less sure about the back branches, as

I think it would be helpful for users to try and give slightly more expanded
advice while (obviously) still always being safe.  I’m happy to take a crack at
that once back unless someone beats me to it.

> (I think) these are translatable strings.


If they aren't I think we should try and make them so to as far as we can
reduce language barrier problems in such important messages.

--
Daniel Gustafsson        https://vmware.com/