Re: [BUGS] Crash report for some ICU-52 (debian8) COLLATE andwork_mem values

On Wed, Aug 9, 2017 at 11:07 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Yes, it is. I think that's fine, though. Other database systems that
>> use ICU for collations do this. Without exception, I think.
>
> Actually, I don't think that's the issue at all.  People are free to
> make other ICU collations if they want to.  My point is that we should
> encourage them to do that, rather than depend on initdb-provided
> collations, because manually-created collations are much more certain
> to move across version upgrades safely.  If we were sure that
> pg_import_system_collations would produce pretty much the same set of
> collation names with future ICU releases as it does with current ones,
> then there would be no issue --- but the evidence at hand suggests the
> opposite.  I want to do something to address that stability issue before
> it comes back to bite us.

I must have been unclear, then. I am fully in agreement with what you say here.


-- 
Peter Geoghegan


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