diff options
Diffstat (limited to 'src/backend/utils/adt/pg_locale.c')
| -rw-r--r-- | src/backend/utils/adt/pg_locale.c | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/src/backend/utils/adt/pg_locale.c b/src/backend/utils/adt/pg_locale.c index 514e0fa0af8..3b0324ce18a 100644 --- a/src/backend/utils/adt/pg_locale.c +++ b/src/backend/utils/adt/pg_locale.c @@ -57,7 +57,9 @@ #include "access/htup_details.h" #include "catalog/pg_collation.h" #include "catalog/pg_control.h" +#include "catalog/pg_database.h" #include "mb/pg_wchar.h" +#include "miscadmin.h" #include "utils/builtins.h" #include "utils/formatting.h" #include "utils/hsearch.h" @@ -139,6 +141,9 @@ static char *IsoLocaleName(const char *); /* MSVC specific */ static void icu_set_collation_attributes(UCollator *collator, const char *loc); #endif +static char *get_collation_actual_version(char collprovider, + const char *collcollate); + /* * pg_perm_setlocale * @@ -1630,7 +1635,7 @@ pg_newlocale_from_collation(Oid collid) * Get provider-specific collation version string for the given collation from * the operating system/library. */ -char * +static char * get_collation_actual_version(char collprovider, const char *collcollate) { char *collversion = NULL; @@ -1712,6 +1717,45 @@ get_collation_actual_version(char collprovider, const char *collcollate) return collversion; } +/* + * Get provider-specific collation version string for a given collation OID. + * Return NULL if the provider doesn't support versions. + */ +char * +get_collation_version_for_oid(Oid oid) +{ + HeapTuple tp; + char *version = NULL; + + Assert(oid != C_COLLATION_OID && oid != POSIX_COLLATION_OID); + + if (oid == DEFAULT_COLLATION_OID) + { + Form_pg_database dbform; + + tp = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(MyDatabaseId)); + if (!HeapTupleIsValid(tp)) + elog(ERROR, "cache lookup failed for database %u", MyDatabaseId); + dbform = (Form_pg_database) GETSTRUCT(tp); + version = get_collation_actual_version(COLLPROVIDER_LIBC, + NameStr(dbform->datcollate)); + } + else + { + Form_pg_collation collform; + + tp = SearchSysCache1(COLLOID, ObjectIdGetDatum(oid)); + if (!HeapTupleIsValid(tp)) + elog(ERROR, "cache lookup failed for collation %u", oid); + collform = (Form_pg_collation) GETSTRUCT(tp); + version = get_collation_actual_version(collform->collprovider, + NameStr(collform->collcollate)); + } + + ReleaseSysCache(tp); + + return version; +} #ifdef USE_ICU /* |