mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-10-01 14:41:24 +02:00
ee94300446
Backpatch certain files through 9.1
182 lines
5.0 KiB
C
182 lines
5.0 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* pg_collation.c
|
|
* routines to support manipulation of the pg_collation relation
|
|
*
|
|
* Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
*
|
|
* IDENTIFICATION
|
|
* src/backend/catalog/pg_collation.c
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
#include "postgres.h"
|
|
|
|
#include "access/genam.h"
|
|
#include "access/heapam.h"
|
|
#include "access/htup_details.h"
|
|
#include "access/sysattr.h"
|
|
#include "catalog/dependency.h"
|
|
#include "catalog/indexing.h"
|
|
#include "catalog/objectaccess.h"
|
|
#include "catalog/pg_collation.h"
|
|
#include "catalog/pg_collation_fn.h"
|
|
#include "catalog/pg_namespace.h"
|
|
#include "mb/pg_wchar.h"
|
|
#include "utils/builtins.h"
|
|
#include "utils/fmgroids.h"
|
|
#include "utils/rel.h"
|
|
#include "utils/syscache.h"
|
|
#include "utils/tqual.h"
|
|
|
|
|
|
/*
|
|
* CollationCreate
|
|
*
|
|
* Add a new tuple to pg_collation.
|
|
*/
|
|
Oid
|
|
CollationCreate(const char *collname, Oid collnamespace,
|
|
Oid collowner,
|
|
int32 collencoding,
|
|
const char *collcollate, const char *collctype)
|
|
{
|
|
Relation rel;
|
|
TupleDesc tupDesc;
|
|
HeapTuple tup;
|
|
Datum values[Natts_pg_collation];
|
|
bool nulls[Natts_pg_collation];
|
|
NameData name_name,
|
|
name_collate,
|
|
name_ctype;
|
|
Oid oid;
|
|
ObjectAddress myself,
|
|
referenced;
|
|
|
|
AssertArg(collname);
|
|
AssertArg(collnamespace);
|
|
AssertArg(collowner);
|
|
AssertArg(collcollate);
|
|
AssertArg(collctype);
|
|
|
|
/*
|
|
* Make sure there is no existing collation of same name & encoding.
|
|
*
|
|
* This would be caught by the unique index anyway; we're just giving a
|
|
* friendlier error message. The unique index provides a backstop against
|
|
* race conditions.
|
|
*/
|
|
if (SearchSysCacheExists3(COLLNAMEENCNSP,
|
|
PointerGetDatum(collname),
|
|
Int32GetDatum(collencoding),
|
|
ObjectIdGetDatum(collnamespace)))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DUPLICATE_OBJECT),
|
|
errmsg("collation \"%s\" for encoding \"%s\" already exists",
|
|
collname, pg_encoding_to_char(collencoding))));
|
|
|
|
/*
|
|
* Also forbid matching an any-encoding entry. This test of course is not
|
|
* backed up by the unique index, but it's not a problem since we don't
|
|
* support adding any-encoding entries after initdb.
|
|
*/
|
|
if (SearchSysCacheExists3(COLLNAMEENCNSP,
|
|
PointerGetDatum(collname),
|
|
Int32GetDatum(-1),
|
|
ObjectIdGetDatum(collnamespace)))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_DUPLICATE_OBJECT),
|
|
errmsg("collation \"%s\" already exists",
|
|
collname)));
|
|
|
|
/* open pg_collation */
|
|
rel = heap_open(CollationRelationId, RowExclusiveLock);
|
|
tupDesc = RelationGetDescr(rel);
|
|
|
|
/* form a tuple */
|
|
memset(nulls, 0, sizeof(nulls));
|
|
|
|
namestrcpy(&name_name, collname);
|
|
values[Anum_pg_collation_collname - 1] = NameGetDatum(&name_name);
|
|
values[Anum_pg_collation_collnamespace - 1] = ObjectIdGetDatum(collnamespace);
|
|
values[Anum_pg_collation_collowner - 1] = ObjectIdGetDatum(collowner);
|
|
values[Anum_pg_collation_collencoding - 1] = Int32GetDatum(collencoding);
|
|
namestrcpy(&name_collate, collcollate);
|
|
values[Anum_pg_collation_collcollate - 1] = NameGetDatum(&name_collate);
|
|
namestrcpy(&name_ctype, collctype);
|
|
values[Anum_pg_collation_collctype - 1] = NameGetDatum(&name_ctype);
|
|
|
|
tup = heap_form_tuple(tupDesc, values, nulls);
|
|
|
|
/* insert a new tuple */
|
|
oid = simple_heap_insert(rel, tup);
|
|
Assert(OidIsValid(oid));
|
|
|
|
/* update the index if any */
|
|
CatalogUpdateIndexes(rel, tup);
|
|
|
|
/* set up dependencies for the new collation */
|
|
myself.classId = CollationRelationId;
|
|
myself.objectId = oid;
|
|
myself.objectSubId = 0;
|
|
|
|
/* create dependency on namespace */
|
|
referenced.classId = NamespaceRelationId;
|
|
referenced.objectId = collnamespace;
|
|
referenced.objectSubId = 0;
|
|
recordDependencyOn(&myself, &referenced, DEPENDENCY_NORMAL);
|
|
|
|
/* create dependency on owner */
|
|
recordDependencyOnOwner(CollationRelationId, HeapTupleGetOid(tup),
|
|
collowner);
|
|
|
|
/* dependency on extension */
|
|
recordDependencyOnCurrentExtension(&myself, false);
|
|
|
|
/* Post creation hook for new collation */
|
|
InvokeObjectPostCreateHook(CollationRelationId, oid, 0);
|
|
|
|
heap_freetuple(tup);
|
|
heap_close(rel, RowExclusiveLock);
|
|
|
|
return oid;
|
|
}
|
|
|
|
/*
|
|
* RemoveCollationById
|
|
*
|
|
* Remove a tuple from pg_collation by Oid. This function is solely
|
|
* called inside catalog/dependency.c
|
|
*/
|
|
void
|
|
RemoveCollationById(Oid collationOid)
|
|
{
|
|
Relation rel;
|
|
ScanKeyData scanKeyData;
|
|
SysScanDesc scandesc;
|
|
HeapTuple tuple;
|
|
|
|
rel = heap_open(CollationRelationId, RowExclusiveLock);
|
|
|
|
ScanKeyInit(&scanKeyData,
|
|
ObjectIdAttributeNumber,
|
|
BTEqualStrategyNumber, F_OIDEQ,
|
|
ObjectIdGetDatum(collationOid));
|
|
|
|
scandesc = systable_beginscan(rel, CollationOidIndexId, true,
|
|
NULL, 1, &scanKeyData);
|
|
|
|
tuple = systable_getnext(scandesc);
|
|
|
|
if (HeapTupleIsValid(tuple))
|
|
simple_heap_delete(rel, &tuple->t_self);
|
|
else
|
|
elog(ERROR, "could not find tuple for collation %u", collationOid);
|
|
|
|
systable_endscan(scandesc);
|
|
|
|
heap_close(rel, RowExclusiveLock);
|
|
}
|