Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> I have to admit that I'm still a little confused about what's actually
> going on here. Commit says that it "fixes inconsistent behavior under
> glibc's hu_HU locale", but it doesn't say what sort of inconsistent
> behavior it fixes.
Unfortunately we were not good back then about linking commits to
list discussions, but a bit of excavation in the archives found this:
https://www.postgresql.org/message-id/27064.1134753128@sss.pgh.pa.us
regards, tom lane