Re: Windows locales and tests portability

Andrey,

I tested the numeric-locale TAP patch from attachment 189686 on native
Windows ARM64 and emulated x64, against master 8e82d6610e7.

Using a local frontend fixture to select German_Germany.1252 for each
process, the original pg_test_timing and psql tests fail on the
decimal-comma output on both architectures. With your patch, both
pass: 18 timing and 134 psql subtests. The timeouts and checkpoint
logical-slot recovery tests also pass, two subtests each, along with
all three setup groups. C process-locale timing/psql controls pass as
well.

This uses a controlled CRT process locale, not a Windows account with
its regional settings changed. The fixture is local only. Other
pending Windows changes were present in the integration builds, so
these results establish the before/after TAP behavior in that setup.

I found no blocker in the test changes. Happy to provide the detailed
logs if useful.

Best,

Harrison

Original discussion:
https://www.postgresql.org/message-id/9247F741-DDAB-4005-93D2-9C6D4F3495C3@yandex-team.ru