/*
* Workhorse for AlterLanguageOwner variants
*/
static void
AlterLanguageOwner_internal(HeapTuple tup, Relation rel, Oid newOwnerId)
{
Form_pg_language lanForm;
lanForm = (Form_pg_language) 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 (lanForm->lanowner != newOwnerId)
{
Datum repl_val[Natts_pg_language];
bool repl_null[Natts_pg_language];
bool repl_repl[Natts_pg_language];
Acl *newAcl;
Datum aclDatum;
bool isNull;
HeapTuple newtuple;
/* Otherwise, must be owner of the existing object */
if (!pg_language_ownercheck(HeapTupleGetOid(tup), GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_LANGUAGE,
NameStr(lanForm->lanname));
/* Must be able to become new owner */
check_is_member_of_role(GetUserId(), newOwnerId);
memset(repl_null, false, sizeof(repl_null));
memset(repl_repl, false, sizeof(repl_repl));
repl_repl[Anum_pg_language_lanowner - 1] = true;
repl_val[Anum_pg_language_lanowner - 1] = ObjectIdGetDatum(newOwnerId);
/*
* Determine the modified ACL for the new owner. This is only
* necessary when the ACL is non-null.
*/
aclDatum = SysCacheGetAttr(LANGNAME, tup,
Anum_pg_language_lanacl,
&isNull);
if (!isNull)
{
newAcl = aclnewowner(DatumGetAclP(aclDatum),
lanForm->lanowner, newOwnerId);
repl_repl[Anum_pg_language_lanacl - 1] = true;
repl_val[Anum_pg_language_lanacl - 1] = PointerGetDatum(newAcl);
}
newtuple = heap_modify_tuple(tup, RelationGetDescr(rel),
repl_val, repl_null, repl_repl);
simple_heap_update(rel, &newtuple->t_self, newtuple);
CatalogUpdateIndexes(rel, newtuple);
heap_freetuple(newtuple);
/* Update owner dependency reference */
changeDependencyOnOwner(LanguageRelationId, HeapTupleGetOid(tup),
newOwnerId);
}
}
/*
* Change tablespace owner
*/
void
AlterTableSpaceOwner(const char *name, Oid newOwnerId)
{
Relation rel;
Oid tablespaceoid;
cqContext cqc;
cqContext *pcqCtx;
Form_pg_tablespace spcForm;
HeapTuple tup;
/* Search pg_tablespace */
rel = heap_open(TableSpaceRelationId, RowExclusiveLock);
pcqCtx = caql_addrel(cqclr(&cqc), rel);
tup = caql_getfirst(
pcqCtx,
cql("SELECT * FROM pg_tablespace "
" WHERE spcname = :1 "
" FOR UPDATE ",
CStringGetDatum(name)));
if (!HeapTupleIsValid(tup))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("tablespace \"%s\" does not exist", name)));
tablespaceoid = HeapTupleGetOid(tup);
spcForm = (Form_pg_tablespace) 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 (spcForm->spcowner != newOwnerId)
{
Datum repl_val[Natts_pg_tablespace];
bool repl_null[Natts_pg_tablespace];
bool repl_repl[Natts_pg_tablespace];
Acl *newAcl;
Datum aclDatum;
bool isNull;
HeapTuple newtuple;
/* Otherwise, must be owner of the existing object */
if (!pg_tablespace_ownercheck(tablespaceoid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_TABLESPACE,
name);
/* Must be able to become new owner */
check_is_member_of_role(GetUserId(), newOwnerId);
/*
* Normally we would also check for create permissions here, but there
* are none for tablespaces so we follow what rename tablespace does
* and omit the create permissions check.
*
* NOTE: Only superusers may create tablespaces to begin with and so
* initially only a superuser would be able to change its ownership
* anyway.
*/
memset(repl_null, false, sizeof(repl_null));
memset(repl_repl, false, sizeof(repl_repl));
repl_repl[Anum_pg_tablespace_spcowner - 1] = true;
repl_val[Anum_pg_tablespace_spcowner - 1] = ObjectIdGetDatum(newOwnerId);
/*
* Determine the modified ACL for the new owner. This is only
* necessary when the ACL is non-null.
*/
aclDatum = heap_getattr(tup,
Anum_pg_tablespace_spcacl,
RelationGetDescr(rel),
&isNull);
if (!isNull)
{
newAcl = aclnewowner(DatumGetAclP(aclDatum),
spcForm->spcowner, newOwnerId);
repl_repl[Anum_pg_tablespace_spcacl - 1] = true;
repl_val[Anum_pg_tablespace_spcacl - 1] = PointerGetDatum(newAcl);
}
newtuple = caql_modify_current(pcqCtx, repl_val, repl_null, repl_repl);
caql_update_current(pcqCtx, newtuple);
/* and Update indexes (implicit) */
/* MPP-6929: metadata tracking */
if (Gp_role == GP_ROLE_DISPATCH)
MetaTrackUpdObject(TableSpaceRelationId,
tablespaceoid,
GetUserId(),
"ALTER", "OWNER"
);
heap_freetuple(newtuple);
/* Update owner dependency reference */
changeDependencyOnOwner(TableSpaceRelationId, HeapTupleGetOid(tup),
newOwnerId);
}
heap_close(rel, NoLock);
}
/*
* Change tablespace owner
*/
void
AlterTableSpaceOwner(const char *name, Oid newOwnerId)
{
Relation rel;
ScanKeyData entry[1];
HeapScanDesc scandesc;
Form_pg_tablespace spcForm;
HeapTuple tup;
/* Search pg_tablespace */
rel = heap_open(TableSpaceRelationId, RowExclusiveLock);
ScanKeyInit(&entry[0],
Anum_pg_tablespace_spcname,
BTEqualStrategyNumber, F_NAMEEQ,
CStringGetDatum(name));
scandesc = heap_beginscan(rel, SnapshotNow, 1, entry);
tup = heap_getnext(scandesc, ForwardScanDirection);
if (!HeapTupleIsValid(tup))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("tablespace \"%s\" does not exist", name)));
spcForm = (Form_pg_tablespace) 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 (spcForm->spcowner != newOwnerId)
{
Datum repl_val[Natts_pg_tablespace];
bool repl_null[Natts_pg_tablespace];
bool repl_repl[Natts_pg_tablespace];
Acl *newAcl;
Datum aclDatum;
bool isNull;
HeapTuple newtuple;
/* Otherwise, must be owner of the existing object */
if (!pg_tablespace_ownercheck(HeapTupleGetOid(tup), GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_TABLESPACE,
name);
/* Must be able to become new owner */
check_is_member_of_role(GetUserId(), newOwnerId);
/*
* Normally we would also check for create permissions here, but there
* are none for tablespaces so we follow what rename tablespace does
* and omit the create permissions check.
*
* NOTE: Only superusers may create tablespaces to begin with and so
* initially only a superuser would be able to change its ownership
* anyway.
*/
memset(repl_null, false, sizeof(repl_null));
memset(repl_repl, false, sizeof(repl_repl));
repl_repl[Anum_pg_tablespace_spcowner - 1] = true;
repl_val[Anum_pg_tablespace_spcowner - 1] = ObjectIdGetDatum(newOwnerId);
/*
* Determine the modified ACL for the new owner. This is only
* necessary when the ACL is non-null.
*/
aclDatum = heap_getattr(tup,
Anum_pg_tablespace_spcacl,
RelationGetDescr(rel),
&isNull);
if (!isNull)
{
newAcl = aclnewowner(DatumGetAclP(aclDatum),
spcForm->spcowner, newOwnerId);
repl_repl[Anum_pg_tablespace_spcacl - 1] = true;
repl_val[Anum_pg_tablespace_spcacl - 1] = PointerGetDatum(newAcl);
}
newtuple = heap_modify_tuple(tup, RelationGetDescr(rel), repl_val, repl_null, repl_repl);
simple_heap_update(rel, &newtuple->t_self, newtuple);
CatalogUpdateIndexes(rel, newtuple);
heap_freetuple(newtuple);
/* Update owner dependency reference */
changeDependencyOnOwner(TableSpaceRelationId, HeapTupleGetOid(tup),
newOwnerId);
}
heap_endscan(scandesc);
heap_close(rel, NoLock);
}
/*
* LargeObjectAlterOwner
*
* Implementation of ALTER LARGE OBJECT statement
*/
void
LargeObjectAlterOwner(Oid loid, Oid newOwnerId)
{
Form_pg_largeobject_metadata form_lo_meta;
Relation pg_lo_meta;
ScanKeyData skey[1];
SysScanDesc scan;
HeapTuple oldtup;
HeapTuple newtup;
pg_lo_meta = heap_open(LargeObjectMetadataRelationId,
RowExclusiveLock);
ScanKeyInit(&skey[0],
ObjectIdAttributeNumber,
BTEqualStrategyNumber, F_OIDEQ,
ObjectIdGetDatum(loid));
scan = systable_beginscan(pg_lo_meta,
LargeObjectMetadataOidIndexId, true,
SnapshotNow, 1, skey);
oldtup = systable_getnext(scan);
if (!HeapTupleIsValid(oldtup))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("large object %u does not exist", loid)));
form_lo_meta = (Form_pg_largeobject_metadata) GETSTRUCT(oldtup);
if (form_lo_meta->lomowner != newOwnerId)
{
Datum values[Natts_pg_largeobject_metadata];
bool nulls[Natts_pg_largeobject_metadata];
bool replaces[Natts_pg_largeobject_metadata];
Acl *newAcl;
Datum aclDatum;
bool isnull;
/* Superusers can always do it */
if (!superuser())
{
/*
* lo_compat_privileges is not checked here, because ALTER LARGE
* OBJECT ... OWNER did not exist at all prior to PostgreSQL 9.0.
*
* We must be the owner of the existing object.
*/
if (!pg_largeobject_ownercheck(loid, GetUserId()))
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be owner of large object %u", loid)));
/* Must be able to become new owner */
check_is_member_of_role(GetUserId(), newOwnerId);
}
memset(values, 0, sizeof(values));
memset(nulls, false, sizeof(nulls));
memset(replaces, false, sizeof(nulls));
values[Anum_pg_largeobject_metadata_lomowner - 1]
= ObjectIdGetDatum(newOwnerId);
replaces[Anum_pg_largeobject_metadata_lomowner - 1] = true;
/*
* Determine the modified ACL for the new owner. This is only
* necessary when the ACL is non-null.
*/
aclDatum = heap_getattr(oldtup,
Anum_pg_largeobject_metadata_lomacl,
RelationGetDescr(pg_lo_meta), &isnull);
if (!isnull)
{
newAcl = aclnewowner(DatumGetAclP(aclDatum),
form_lo_meta->lomowner, newOwnerId);
values[Anum_pg_largeobject_metadata_lomacl - 1]
= PointerGetDatum(newAcl);
replaces[Anum_pg_largeobject_metadata_lomacl - 1] = true;
}
newtup = heap_modify_tuple(oldtup, RelationGetDescr(pg_lo_meta),
values, nulls, replaces);
simple_heap_update(pg_lo_meta, &newtup->t_self, newtup);
CatalogUpdateIndexes(pg_lo_meta, newtup);
heap_freetuple(newtup);
/* Update owner dependency reference */
changeDependencyOnOwner(LargeObjectRelationId,
loid, newOwnerId);
}
systable_endscan(scan);
heap_close(pg_lo_meta, RowExclusiveLock);
}