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refactor ALTER some-obj SET OWNER implementation

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Remove duplicate implementation of catalog munging and miscellaneous
privilege and consistency checks.  Instead rely on already existing data
in objectaddress.c to do the work.

Author: KaiGai Kohei
Tweaked by me
Reviewed by Robert Haas
This commit is contained in:
Alvaro Herrera
2012-10-03 18:02:38 -03:00
parent 1f91c8ca1d
commit 994c36e01d
24 changed files with 270 additions and 1338 deletions
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101
src/backend/commands/collationcmds.c
View File

@ -34,9 +34,6 @@
#include "utils/rel.h"
#include "utils/syscache.h"
static void AlterCollationOwner_internal(Relation rel, Oid collationOid,
Oid newOwnerId);
/*
* CREATE COLLATION
*/
@ -211,104 +208,6 @@ RenameCollation(List *name, const char *newname)
heap_close(rel, RowExclusiveLock);
}
/*
* Change collation owner, by name
*/
void
AlterCollationOwner(List *name, Oid newOwnerId)
{
Oid collationOid;
Relation rel;
rel = heap_open(CollationRelationId, RowExclusiveLock);
collationOid = get_collation_oid(name, false);
AlterCollationOwner_internal(rel, collationOid, newOwnerId);
heap_close(rel, RowExclusiveLock);
}
/*
* Change collation owner, by oid
*/
void
AlterCollationOwner_oid(Oid collationOid, Oid newOwnerId)
{
Relation rel;
rel = heap_open(CollationRelationId, RowExclusiveLock);
AlterCollationOwner_internal(rel, collationOid, newOwnerId);
heap_close(rel, RowExclusiveLock);
}
/*
* AlterCollationOwner_internal
*
* Internal routine for changing the owner. rel must be pg_collation, already
* open and suitably locked; it will not be closed.
*/
static void
AlterCollationOwner_internal(Relation rel, Oid collationOid, Oid newOwnerId)
{
Form_pg_collation collForm;
HeapTuple tup;
Assert(RelationGetRelid(rel) == CollationRelationId);
tup = SearchSysCacheCopy1(COLLOID, ObjectIdGetDatum(collationOid));
if (!HeapTupleIsValid(tup)) /* should not happen */
elog(ERROR, "cache lookup failed for collation %u", collationOid);
collForm = (Form_pg_collation) GETSTRUCT(tup);
/*
* If the new owner is the same as the existing owner, consider the
* command to have succeeded. This is for dump restoration purposes.
*/
if (collForm->collowner != newOwnerId)
{
AclResult aclresult;
/* Superusers can always do it */
if (!superuser())
{
/* Otherwise, must be owner of the existing object */
if (!pg_collation_ownercheck(HeapTupleGetOid(tup), GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_COLLATION,
NameStr(collForm->collname));
/* Must be able to become new owner */
check_is_member_of_role(GetUserId(), newOwnerId);
/* New owner must have CREATE privilege on namespace */
aclresult = pg_namespace_aclcheck(collForm->collnamespace,
newOwnerId,
ACL_CREATE);
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
get_namespace_name(collForm->collnamespace));
}
/*
* Modify the owner --- okay to scribble on tup because it's a copy
*/
collForm->collowner = newOwnerId;
simple_heap_update(rel, &tup->t_self, tup);
CatalogUpdateIndexes(rel, tup);
/* Update owner dependency reference */
changeDependencyOnOwner(CollationRelationId, collationOid,
newOwnerId);
}
heap_freetuple(tup);
}
/*
* Execute ALTER COLLATION SET SCHEMA
*/