Repair a longstanding bug in CLUSTER and the rewriting variants of ALTER

TABLE: if the command is executed by someone other than the table owner (eg,
a superuser) and the table has a toast table, the toast table's pg_type row
ends up with the wrong typowner, ie, the command issuer not the table owner.
This is quite harmless for most purposes, since no interesting permissions
checks consult the pg_type row.  However, it could lead to unexpected failures
if one later tries to drop the role that issued the command (in 8.1 or 8.2),
or strange warnings from pg_dump afterwards (in 8.3 and up, which will allow
the DROP ROLE because we don't create a "redundant" owner dependency for table
rowtypes).  Problem identified by Cott Lang.

Back-patch to 8.1.  The problem is actually far older --- the CLUSTER variant
can be demonstrated in 7.0 --- but it's mostly cosmetic before 8.1 because we
didn't track ownership dependencies before 8.1.  Also, fixing it before 8.1
would require changing the call signature of heap_create_with_catalog(), which
seems to carry a nontrivial risk of breaking add-on modules.

src/backend/catalog/heap.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/catalog/heap.c,v 1.292.2.2 2006/04/24 01:40:39 alvherre Exp $
+ *	  $PostgreSQL: pgsql/src/backend/catalog/heap.c,v 1.292.2.3 2009/02/24 01:39:10 tgl Exp $
  *
  *
  * INTERFACE ROUTINES
@@ -70,7 +70,8 @@ static void AddNewRelationTuple(Relation pg_class_desc,
 static Oid AddNewRelationType(const char *typeName,
 				   Oid typeNamespace,
 				   Oid new_rel_oid,
-				   char new_rel_kind);
+				   char new_rel_kind,
+				   Oid ownerid);
 static void RelationRemoveInheritance(Oid relid);
 static void StoreRelCheck(Relation rel, char *ccname, char *ccbin);
 static void StoreConstraints(Relation rel, TupleDesc tupdesc);
@@ -629,13 +630,15 @@ static Oid
 AddNewRelationType(const char *typeName,
 				   Oid typeNamespace,
 				   Oid new_rel_oid,
-				   char new_rel_kind)
+				   char new_rel_kind,
+				   Oid ownerid)
 {
 	return
 		TypeCreate(typeName,	/* type name */
 				   typeNamespace,		/* type namespace */
 				   new_rel_oid, /* relation oid */
 				   new_rel_kind,	/* relation kind */
+				   ownerid,		/* owner's ID */
 				   -1,			/* internal size (varlena) */
 				   'c',			/* type-type (complex) */
 				   ',',			/* default array delimiter */
@@ -730,7 +733,8 @@ heap_create_with_catalog(const char *relname,
 	new_type_oid = AddNewRelationType(relname,
 									  relnamespace,
 									  relid,
-									  relkind);
+									  relkind,
+									  ownerid);
 
 	/*
 	 * now create an entry in pg_class for the relation.

src/backend/catalog/pg_type.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/catalog/pg_type.c,v 1.104 2005/10/15 02:49:14 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/catalog/pg_type.c,v 1.104.2.1 2009/02/24 01:39:10 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -40,7 +40,7 @@
  * ----------------------------------------------------------------
  */
 Oid
-TypeShellMake(const char *typeName, Oid typeNamespace)
+TypeShellMake(const char *typeName, Oid typeNamespace, Oid ownerId)
 {
 	Relation	pg_type_desc;
 	TupleDesc	tupDesc;
@@ -75,7 +75,7 @@ TypeShellMake(const char *typeName, Oid typeNamespace)
 	namestrcpy(&name, typeName);
 	values[i++] = NameGetDatum(&name);	/* typname */
 	values[i++] = ObjectIdGetDatum(typeNamespace);		/* typnamespace */
-	values[i++] = ObjectIdGetDatum(GetUserId());		/* typowner */
+	values[i++] = ObjectIdGetDatum(ownerId);		/* typowner */
 	values[i++] = Int16GetDatum(0);		/* typlen */
 	values[i++] = BoolGetDatum(false);	/* typbyval */
 	values[i++] = CharGetDatum(0);		/* typtype */
@@ -117,7 +117,7 @@ TypeShellMake(const char *typeName, Oid typeNamespace)
 								 typoid,
 								 InvalidOid,
 								 0,
-								 GetUserId(),
+								 ownerId,
 								 InvalidOid,
 								 InvalidOid,
 								 InvalidOid,
@@ -150,6 +150,7 @@ TypeCreate(const char *typeName,
 		   Oid typeNamespace,
 		   Oid relationOid,		/* only for 'c'atalog types */
 		   char relationKind,	/* ditto */
+		   Oid ownerId,
 		   int16 internalSize,
 		   char typeType,
 		   char typDelim,
@@ -224,7 +225,7 @@ TypeCreate(const char *typeName,
 	namestrcpy(&name, typeName);
 	values[i++] = NameGetDatum(&name);	/* typname */
 	values[i++] = ObjectIdGetDatum(typeNamespace);		/* typnamespace */
-	values[i++] = ObjectIdGetDatum(GetUserId());		/* typowner */
+	values[i++] = ObjectIdGetDatum(ownerId);	/* typowner */
 	values[i++] = Int16GetDatum(internalSize);	/* typlen */
 	values[i++] = BoolGetDatum(passedByValue);	/* typbyval */
 	values[i++] = CharGetDatum(typeType);		/* typtype */
@@ -323,7 +324,7 @@ TypeCreate(const char *typeName,
 								 typeObjectId,
 								 relationOid,
 								 relationKind,
-								 GetUserId(),
+								 ownerId,
 								 inputProcedure,
 								 outputProcedure,
 								 receiveProcedure,

src/backend/commands/functioncmds.c

@@ -10,7 +10,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/functioncmds.c,v 1.69 2005/10/15 02:49:15 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/functioncmds.c,v 1.69.2.1 2009/02/24 01:39:10 tgl Exp $
  *
  * DESCRIPTION
  *	  These routines take the parse tree and pick out the
@@ -123,7 +123,7 @@ compute_return_type(TypeName *returnType, Oid languageOid,
 		if (aclresult != ACLCHECK_OK)
 			aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
 						   get_namespace_name(namespaceId));
-		rettype = TypeShellMake(typname, namespaceId);
+		rettype = TypeShellMake(typname, namespaceId, GetUserId());
 		Assert(OidIsValid(rettype));
 	}
 

src/backend/commands/typecmds.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/typecmds.c,v 1.82.2.2 2007/06/20 18:16:04 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/typecmds.c,v 1.82.2.3 2009/02/24 01:39:10 tgl Exp $
  *
  * DESCRIPTION
  *	  The "DefineFoo" routines take the parse tree and pick out the
@@ -251,7 +251,7 @@ DefineType(List *names, List *parameters)
 							0, 0);
 	if (!OidIsValid(typoid))
 	{
-		typoid = TypeShellMake(typeName, typeNamespace);
+		typoid = TypeShellMake(typeName, typeNamespace, GetUserId());
 		/* Make new shell type visible for modification below */
 		CommandCounterIncrement();
 	}
@@ -338,6 +338,7 @@ DefineType(List *names, List *parameters)
 				   typeNamespace,		/* namespace */
 				   InvalidOid,	/* relation oid (n/a here) */
 				   0,			/* relation kind (ditto) */
+				   GetUserId(),	/* owner's ID */
 				   internalLength,		/* internal size */
 				   'b',			/* type-type (base type) */
 				   delimiter,	/* array element delimiter */
@@ -370,6 +371,7 @@ DefineType(List *names, List *parameters)
 			   typeNamespace,	/* namespace */
 			   InvalidOid,		/* relation oid (n/a here) */
 			   0,				/* relation kind (ditto) */
+			   GetUserId(),		/* owner's ID */
 			   -1,				/* internal size */
 			   'b',				/* type-type (base type) */
 			   DEFAULT_TYPDELIM,	/* array element delimiter */
@@ -732,6 +734,7 @@ DefineDomain(CreateDomainStmt *stmt)
 				   domainNamespace,		/* namespace */
 				   InvalidOid,	/* relation oid (n/a here) */
 				   0,			/* relation kind (ditto) */
+				   GetUserId(),	/* owner's ID */
 				   internalLength,		/* internal size */
 				   'd',			/* type-type (domain type) */
 				   delimiter,	/* array element delimiter */

src/include/catalog/pg_type.h

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/catalog/pg_type.h,v 1.166.2.1 2005/11/22 18:23:27 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_type.h,v 1.166.2.2 2009/02/24 01:39:10 tgl Exp $
  *
  * NOTES
  *	  the genbki.sh script reads this file and generates .bki
@@ -550,12 +550,15 @@ DATA(insert OID = 2283 ( anyelement		PGNSP PGUID  4 t p t \054 0 0 anyelement_in
 /*
  * prototypes for functions in pg_type.c
  */
-extern Oid	TypeShellMake(const char *typeName, Oid typeNamespace);
+extern Oid	TypeShellMake(const char *typeName,
+						  Oid typeNamespace,
+						  Oid ownerId);
 
 extern Oid TypeCreate(const char *typeName,
 		   Oid typeNamespace,
 		   Oid relationOid,
 		   char relationKind,
+		   Oid ownerId,
 		   int16 internalSize,
 		   char typeType,
 		   char typDelim,