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Refactor pg_set_regex_collation() for clarity.

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Discussion: https://postgr.es/m/63409030-2746-462e-beac-759bd43032ce@proxel.se
Reviewed-by: Andreas Karlsson
This commit is contained in:
Jeff Davis
2024-07-28 16:55:17 -07:00
parent da87dc07f1
commit 2e68077b07
1 changed files with 22 additions and 18 deletions
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40
src/backend/regex/regc_pg_locale.c
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@ -261,29 +261,33 @@ pg_set_regex_collation(Oid collation)
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("nondeterministic collations are not supported for regular expressions")));
#ifdef USE_ICU
if (pg_regex_locale && pg_regex_locale->provider == COLLPROVIDER_ICU)
pg_regex_strategy = PG_REGEX_LOCALE_ICU;
else
#endif
if (GetDatabaseEncoding() == PG_UTF8)
if (pg_regex_locale && pg_regex_locale->provider == COLLPROVIDER_BUILTIN)
{
if (pg_regex_locale)
Assert(GetDatabaseEncoding() == PG_UTF8);
pg_regex_strategy = PG_REGEX_BUILTIN;
}
#ifdef USE_ICU
else if (pg_regex_locale && pg_regex_locale->provider == COLLPROVIDER_ICU)
{
pg_regex_strategy = PG_REGEX_LOCALE_ICU;
}
#endif
else
{
if (GetDatabaseEncoding() == PG_UTF8)
{
if (pg_regex_locale->provider == COLLPROVIDER_BUILTIN)
pg_regex_strategy = PG_REGEX_BUILTIN;
else
if (pg_regex_locale)
pg_regex_strategy = PG_REGEX_LOCALE_WIDE_L;
else
pg_regex_strategy = PG_REGEX_LOCALE_WIDE;
}
else
pg_regex_strategy = PG_REGEX_LOCALE_WIDE;
}
else
{
if (pg_regex_locale)
pg_regex_strategy = PG_REGEX_LOCALE_1BYTE_L;
else
pg_regex_strategy = PG_REGEX_LOCALE_1BYTE;
{
if (pg_regex_locale)
pg_regex_strategy = PG_REGEX_LOCALE_1BYTE_L;
else
pg_regex_strategy = PG_REGEX_LOCALE_1BYTE;
}
}
pg_regex_collation = collation;