On Fri, Jun 9, 2017 at 11:09 AM, Robert Haas <robertmh...@gmail.com> wrote:
>> Isn't that what strxfrm() is?
> Yeah, just with bugs.  If ICU has a non-buggy equivalent, then we can
> make this work.

I agree that it probably isn't worth using strxfrm() again, simply
because the glibc implementation is buggy, and glibc as a project is
not at all concerned about how badly that would affect PostgreSQL.

I would like to point out on this thread that the strcmp() tie-breaker
is also a big blocker to implementing normalized keys in B-Tree
indexes (at least, if you want to get them for collated text, which I
think you really need to make the implementation effort worth it).
This is something that is discussed in a section on the normalized
keys wiki page I created recently [1].

Peter Geoghegan

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