Tom Lane writes:
> How exactly would you know whether the previous installation was built
> without HAVE_WCSTOMBS/HAVE_TOWLOWER? That's not exposed anywhere
> reliable. And it's not out of the question that somebody upgrading to
> a newer PG version might upgrade his OS too, so I would not think
Dimitri Fontaine writes:
> Tom Lane writes:
>> If there is anybody still using Postgres on machines without wcstombs() or
>> towlower(), and they have non-ASCII data indexed by pg_trgm, they'll need
>> to REINDEX those indexes after pg_upgrade to 9.3, else searches may fail
>> incorrectly. It see
