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

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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.
This commit is contained in:
Tom Lane
2009-02-24 01:38:10 +00:00
parent 7de7876cd5
commit f73bed308a
5 changed files with 28 additions and 14 deletions
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4
src/backend/commands/functioncmds.c
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/functioncmds.c,v 1.107 2009/01/06 02:01:27 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/functioncmds.c,v 1.108 2009/02/24 01:38:09 tgl Exp $
*
* DESCRIPTION
* These routines take the parse tree and pick out the
@ -144,7 +144,7 @@ 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));
}