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Implement DROP OWNED and REASSIGN OWNED. These new commands facilitate the

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process of dropping roles by dropping objects owned by them and privileges
granted to them, or giving the owned objects to someone else, through the
use of the data stored in the new pg_shdepend catalog.

Some refactoring of the GRANT/REVOKE code was needed, as well as ALTER OWNER
code.  Further cleanup of code duplication in the GRANT code seems necessary.

Implemented by me after an idea from Tom Lane, who also provided various kind
of implementation advice.

Regression tests pass.  Some tests for the new functionality are also added,
as well as rudimentary documentation.
This commit is contained in:
Alvaro Herrera
2005-11-21 12:49:33 +00:00
parent c52795d18a
commit cec3b0a9e6
31 changed files with 1532 additions and 377 deletions
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77
src/backend/commands/opclasscmds.c
View File

@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/opclasscmds.c,v 1.38 2005/10/15 02:49:15 momjian Exp $
* $PostgreSQL: pgsql/src/backend/commands/opclasscmds.c,v 1.39 2005/11/21 12:49:31 alvherre Exp $
*
*-------------------------------------------------------------------------
*/
@ -58,6 +58,8 @@ static Oid assignProcSubtype(Oid amoid, Oid typeoid, Oid procOid);
static void addClassMember(List **list, OpClassMember *member, bool isProc);
static void storeOperators(Oid opclassoid, List *operators);
static void storeProcedures(Oid opclassoid, List *procedures);
static void AlterOpClassOwner_internal(Relation rel, HeapTuple tuple,
Oid newOwnerId);
/*
@ -879,20 +881,39 @@ RenameOpClass(List *name, const char *access_method, const char *newname)
}
/*
* Change opclass owner
* Change opclass owner by oid
*/
void
AlterOpClassOwner_oid(Oid opcOid, Oid newOwnerId)
{
Relation rel;
HeapTuple tup;
rel = heap_open(OperatorClassRelationId, RowExclusiveLock);
tup = SearchSysCacheCopy(CLAOID,
ObjectIdGetDatum(opcOid),
0, 0, 0);
if (!HeapTupleIsValid(tup)) /* shouldn't happen */
elog(ERROR, "cache lookup failed for opclass %u", opcOid);
AlterOpClassOwner_internal(rel, tup, newOwnerId);
heap_freetuple(tup);
heap_close(rel, NoLock);
}
/*
* Change opclass owner by name
*/
void
AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId)
{
Oid opcOid;
Oid amOid;
Oid namespaceOid;
char *schemaname;
char *opcname;
HeapTuple tup;
Relation rel;
AclResult aclresult;
Form_pg_opclass opcForm;
HeapTuple tup;
char *opcname;
char *schemaname;
amOid = GetSysCacheOid(AMNAME,
CStringGetDatum(access_method),
@ -912,6 +933,8 @@ AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId)
if (schemaname)
{
Oid namespaceOid;
namespaceOid = LookupExplicitNamespace(schemaname);
tup = SearchSysCacheCopy(CLAAMNAMENSP,
@ -924,11 +947,11 @@ AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId)
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("operator class \"%s\" does not exist for access method \"%s\"",
opcname, access_method)));
opcOid = HeapTupleGetOid(tup);
}
else
{
Oid opcOid;
opcOid = OpclassnameGetOpcid(amOid, opcname);
if (!OidIsValid(opcOid))
ereport(ERROR,
@ -941,10 +964,32 @@ AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId)
0, 0, 0);
if (!HeapTupleIsValid(tup)) /* should not happen */
elog(ERROR, "cache lookup failed for opclass %u", opcOid);
namespaceOid = ((Form_pg_opclass) GETSTRUCT(tup))->opcnamespace;
}
AlterOpClassOwner_internal(rel, tup, newOwnerId);
heap_freetuple(tup);
heap_close(rel, NoLock);
}
/*
* The first parameter is pg_opclass, opened and suitably locked. The second
* parameter is the tuple from pg_opclass we want to modify.
*/
static void
AlterOpClassOwner_internal(Relation rel, HeapTuple tup, Oid newOwnerId)
{
Oid namespaceOid;
AclResult aclresult;
Form_pg_opclass opcForm;
Assert(tup->t_tableOid == OperatorClassRelationId);
Assert(RelationGetRelid(rel) == OperatorClassRelationId);
opcForm = (Form_pg_opclass) GETSTRUCT(tup);
namespaceOid = opcForm->opcnamespace;
/*
* If the new owner is the same as the existing owner, consider the
* command to have succeeded. This is for dump restoration purposes.
@ -957,7 +1002,7 @@ AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId)
/* Otherwise, must be owner of the existing object */
if (!pg_opclass_ownercheck(HeapTupleGetOid(tup), GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_OPCLASS,
NameListToString(name));
NameStr(opcForm->opcname));
/* Must be able to become new owner */
check_is_member_of_role(GetUserId(), newOwnerId);
@ -980,9 +1025,7 @@ AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId)
CatalogUpdateIndexes(rel, tup);
/* Update owner dependency reference */
changeDependencyOnOwner(OperatorClassRelationId, opcOid, newOwnerId);
changeDependencyOnOwner(OperatorClassRelationId, HeapTupleGetOid(tup),
newOwnerId);
}
heap_close(rel, NoLock);
heap_freetuple(tup);
}