| From: | Jeff Davis <jdavis(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Fix pg_iswcased(). |
| Date: | 2026-09-10 03:44:07 |
| Message-ID: | E1x4Vhm-00000004E3g-2gqq@gemulon.postgresql.org |
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| Lists: | pgsql-committers |
Fix pg_iswcased().
Commits 630706ced0 and 9c8de15969 lost some encoding-specific nuances:
in libc with EUC encodings, or in ICU with any non-UTF8 encoding, we
cannot easily classify characters, so we must assume they are
case-varying. Restore these behaviors.
Previously, ILIKE using an index scan could cause wrong results.
Reported-by: Noah Misch <noah(at)leadboat(dot)com>
Discussion: https://postgr.es/m/20260826221526.89.noahmisch@microsoft.com
Backpatch-through: 19
Branch
------
REL_19_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/b264391a846e8b5917b00dde2399c38843c75bb8
Modified Files
--------------
src/backend/utils/adt/pg_locale.c | 5 +++++
src/backend/utils/adt/pg_locale_icu.c | 16 ++++++++++++++-
src/backend/utils/adt/pg_locale_libc.c | 36 ++++++++++++++++++++++++++++++----
3 files changed, 52 insertions(+), 5 deletions(-)
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