database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-14 18:42:34 +03:00
Code Activity

Track collation versions for indexes.

Browse Source 
Record the current version of dependent collations in pg_depend when
creating or rebuilding an index.  When accessing the index later, warn
that the index may be corrupted if the current version doesn't match.

Thanks to Douglas Doole, Peter Eisentraut, Christoph Berg, Laurenz Albe,
Michael Paquier, Robert Haas, Tom Lane and others for very helpful
discussion.

Author: Thomas Munro <thomas.munro@gmail.com>
Author: Julien Rouhaud <rjuju123@gmail.com>
Reviewed-by: Peter Eisentraut <peter.eisentraut@2ndquadrant.com> (earlier versions)
Discussion: https://postgr.es/m/CAEepm%3D0uEQCpfq_%2BLYFBdArCe4Ot98t1aR4eYiYTe%3DyavQygiQ%40mail.gmail.com
This commit is contained in:
Thomas Munro
2020-11-02 19:50:45 +13:00
parent cd6f479e79
commit 257836a755
43 changed files with 1287 additions and 94 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
src/backend/utils/adt/pg_locale.c
View File

@ -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
/*