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Allow tailoring of ICU locales with custom rules

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This exposes the ICU facility to add custom collation rules to a
standard collation.

New options are added to CREATE COLLATION, CREATE DATABASE, createdb,
and initdb to set the rules.

Reviewed-by: Laurenz Albe <laurenz.albe@cybertec.at>
Reviewed-by: Daniel Verite <daniel@manitou-mail.org>
Discussion: https://www.postgresql.org/message-id/flat/821c71a4-6ef0-d366-9acf-bb8e367f739f@enterprisedb.com
This commit is contained in:
Peter Eisentraut
2023-03-08 16:35:42 +01:00
parent b1534ed99d
commit 30a53b7929
22 changed files with 380 additions and 59 deletions
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11
src/backend/utils/init/postinit.c
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@@ -421,10 +421,19 @@ CheckMyDatabase(const char *name, bool am_superuser, bool override_allow_connect
if (dbform->datlocprovider == COLLPROVIDER_ICU)
{
char *icurules;
datum = SysCacheGetAttr(DATABASEOID, tup, Anum_pg_database_daticulocale, &isnull);
Assert(!isnull);
iculocale = TextDatumGetCString(datum);
make_icu_collator(iculocale, &default_locale);
datum = SysCacheGetAttr(DATABASEOID, tup, Anum_pg_database_daticurules, &isnull);
if (!isnull)
icurules = TextDatumGetCString(datum);
else
icurules = NULL;
make_icu_collator(iculocale, icurules, &default_locale);
}
else
iculocale = NULL;