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IsSystemRelationName() treats TOAST relations as system relations.

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This seems the right thing for most usages, but I notice two places
where it is the wrong thing.  One is that the default permissions on
TOAST rels should be no-access, not world-readable; the other is that
PrepareForTupleInvalidation doesn't really need to spend time looking
at tuples of TOAST relations.
This commit is contained in:
Tom Lane 2001-11-16 23:30:35 +00:00
parent aea081bb27
commit c845b4272c
4 changed files with 30 additions and 11 deletions
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26
src/backend/catalog/catalog.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/catalog/catalog.c,v 1.43 2001/08/10 18:57:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/catalog/catalog.c,v 1.44 2001/11/16 23:30:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -77,6 +77,10 @@ GetDatabasePath(Oid tblNode)
* IsSystemRelationName
* True iff name is the name of a system catalog relation.
*
* NB: TOAST relations are considered system relations by this test.
* This is appropriate in many places but not all. Where it's not,
* also check IsToastRelationName.
*
* We now make a new requirement where system catalog relns must begin
* with pg_ while user relns are forbidden to do so. Make the test
* trivial and instantaneous.
@ -86,12 +90,20 @@ GetDatabasePath(Oid tblNode)
bool
IsSystemRelationName(const char *relname)
{
if (relname[0] && relname[1] && relname[2])
return (relname[0] == 'p' &&
relname[1] == 'g' &&
relname[2] == '_');
else
return FALSE;
/* ugly coding for speed */
return (relname[0] == 'p' &&
relname[1] == 'g' &&
relname[2] == '_');
}
/*
* IsToastRelationName
* True iff name is the name of a TOAST support relation (or index).
*/
bool
IsToastRelationName(const char *relname)
{
return strncmp(relname, "pg_toast_", 9) == 0;
}
/*

6
src/backend/utils/adt/acl.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/acl.c,v 1.65 2001/10/25 05:49:43 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/acl.c,v 1.66 2001/11/16 23:30:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -385,7 +385,9 @@ acldefault(const char *relname, AclId ownerid)
aip = ACL_DAT(acl);
aip[0].ai_idtype = ACL_IDTYPE_WORLD;
aip[0].ai_id = ACL_ID_WORLD;
aip[0].ai_mode = IsSystemRelationName(relname) ? ACL_SELECT : ACL_WORLD_DEFAULT;
aip[0].ai_mode = (IsSystemRelationName(relname) &&
!IsToastRelationName(relname)) ? ACL_SELECT
: ACL_WORLD_DEFAULT;
aip[1].ai_idtype = ACL_IDTYPE_UID;
aip[1].ai_id = ownerid;
aip[1].ai_mode = ACL_OWNER_DEFAULT;

6
src/backend/utils/cache/inval.c vendored
View File

@ -56,7 +56,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/inval.c,v 1.46 2001/10/25 05:49:46 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/inval.c,v 1.47 2001/11/16 23:30:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -437,9 +437,13 @@ PrepareForTupleInvalidation(Relation relation, HeapTuple tuple,
* We only need to worry about invalidation for tuples that are in
* system relations; user-relation tuples are never in catcaches and
* can't affect the relcache either.
*
* TOAST tuples can likewise be ignored here.
*/
if (!IsSystemRelationName(NameStr(RelationGetForm(relation)->relname)))
return;
if (IsToastRelationName(NameStr(RelationGetForm(relation)->relname)))
return;
/*
* First let the catcache do its thing

3
src/include/catalog/catalog.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: catalog.h,v 1.20 2001/11/05 17:46:31 momjian Exp $
* $Id: catalog.h,v 1.21 2001/11/16 23:30:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -22,6 +22,7 @@ extern char *relpath(RelFileNode rnode);
extern char *GetDatabasePath(Oid tblNode);
extern bool IsSystemRelationName(const char *relname);
extern bool IsToastRelationName(const char *relname);
extern bool IsSharedSystemRelationName(const char *relname);
extern Oid newoid(void);