pgsql: ICU: use UTF8-optimized case conversion API

From: Jeff Davis <jdavis(at)postgresql(dot)org>
To: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: pgsql: ICU: use UTF8-optimized case conversion API
Date: 2026-01-06 22:10:20
Message-ID: E1vdFFr-004xoQ-2U@gemulon.postgresql.org
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ICU: use UTF8-optimized case conversion API

Initializes a UCaseMap object once for use across calls, and uses
UTF8-optimized APIs.

Author: Andreas Karlsson <andreas(at)proxel(dot)se>
Reviewed-by: zengman <zengman(at)halodbtech(dot)com>
Discussion: https://postgr.es/m/5a010b27-8ed9-4739-86fe-1562b07ba564@proxel.se

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/c4ff35f10441de7dbed4e87737bca205dcca698e

Modified Files
--------------
src/backend/utils/adt/pg_locale_icu.c | 291 +++++++++++++++++++++++-----------
src/common/unicode/case_test.c | 2 +-
src/include/utils/pg_locale.h | 2 +
src/tools/pgindent/typedefs.list | 1 +
4 files changed, 202 insertions(+), 94 deletions(-)

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