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Add option to use ICU as global locale provider

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This adds the option to use ICU as the default locale provider for
either the whole cluster or a database.  New options for initdb,
createdb, and CREATE DATABASE are used to select this.

Since some (legacy) code still uses the libc locale facilities
directly, we still need to set the libc global locale settings even if
ICU is otherwise selected.  So pg_database now has three
locale-related fields: the existing datcollate and datctype, which are
always set, and a new daticulocale, which is only set if ICU is
selected.  A similar change is made in pg_collation for consistency,
but in that case, only the libc-related fields or the ICU-related
field is set, never both.

Reviewed-by: Julien Rouhaud <rjuju123@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/5e756dd6-0e91-d778-96fd-b1bcb06c161a%402ndquadrant.com
This commit is contained in:
Peter Eisentraut
2022-03-17 11:11:21 +01:00
parent f6f0db4d62
commit f2553d4306
35 changed files with 946 additions and 166 deletions
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5
src/include/utils/pg_locale.h
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@@ -103,6 +103,11 @@ struct pg_locale_struct
typedef struct pg_locale_struct *pg_locale_t;
extern struct pg_locale_struct default_locale;
extern void make_icu_collator(const char *iculocstr,
struct pg_locale_struct *resultp);
extern pg_locale_t pg_newlocale_from_collation(Oid collid);
extern char *get_collation_actual_version(char collprovider, const char *collcollate);