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Support toasting of shared system relations, and provide toast tables for

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pg_database, pg_shadow, pg_group, all of which now have potentially-long
fields.  Along the way, get rid of SharedSystemRelationNames list: shared
rels are now identified in their include/pg_catalog/*.h files by a
BKI_SHARED_RELATION macro, while indexes and toast rels inherit sharedness
automatically from their parent table.  Fix some bugs with failure to detoast
pg_group.grolist during ALTER GROUP.
This commit is contained in:
Tom Lane
2002-04-27 21:24:34 +00:00
parent 108871f4fc
commit c06f6a6bc2
27 changed files with 403 additions and 531 deletions
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23
src/backend/utils/cache/relcache.c vendored
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.162 2002/04/19 16:36:08 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.163 2002/04/27 21:24:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1319,7 +1319,10 @@ LookupOpclassInfo(Oid operatorClassOid,
* The relation descriptor is built just from the supplied parameters,
* without actually looking at any system table entries. We cheat
* quite a lot since we only need to work for a few basic system
* catalogs...
* catalogs.
*
* formrdesc is currently used for: pg_class, pg_attribute, pg_proc,
* and pg_type (see RelationCacheInitialize).
*
* Note that these catalogs can't have constraints, default values,
* rules, or triggers, since we don't cope with any of that.
@@ -1374,9 +1377,10 @@ formrdesc(const char *relationName,
/*
* It's important to distinguish between shared and non-shared
* relations, even at bootstrap time, to make sure we know where they
* are stored.
* are stored. At present, all relations that formrdesc is used for
* are not shared.
*/
relation->rd_rel->relisshared = IsSharedSystemRelationName(relationName);
relation->rd_rel->relisshared = false;
relation->rd_rel->relpages = 1;
relation->rd_rel->reltuples = 1;
@@ -1434,15 +1438,8 @@ formrdesc(const char *relationName,
/* In bootstrap mode, we have no indexes */
if (!IsBootstrapProcessingMode())
{
/*
* This list is incomplete, but it only has to work for the set of
* rels that formrdesc is used for ...
*/
if (strcmp(relationName, RelationRelationName) == 0 ||
strcmp(relationName, AttributeRelationName) == 0 ||
strcmp(relationName, ProcedureRelationName) == 0 ||
strcmp(relationName, TypeRelationName) == 0)
relation->rd_rel->relhasindex = true;
/* Otherwise, all the rels formrdesc is used for have indexes */
relation->rd_rel->relhasindex = true;
}
/*

37
src/backend/utils/init/globals.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/init/globals.c,v 1.63 2002/03/02 21:39:33 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/init/globals.c,v 1.64 2002/04/27 21:24:34 tgl Exp $
*
* NOTES
* Globals used all over the place should be declared here and not
@@ -18,14 +18,6 @@
*/
#include "postgres.h"
#include <fcntl.h>
#include <sys/file.h>
#include <sys/types.h>
#include <math.h>
#include <unistd.h>
#include "catalog/catname.h"
#include "catalog/indexing.h"
#include "libpq/pqcomm.h"
#include "miscadmin.h"
#include "storage/backendid.h"
@@ -47,14 +39,11 @@ struct Port *MyProcPort;
long MyCancelKey;
char *DataDir = NULL;
/*
* The PGDATA directory user says to use, or defaults to via environment
* variable. NULL if no option given and no environment variable set
*/
Relation reldesc; /* current relation descriptor */
char OutputFileName[MAXPGPATH];
char pg_pathname[MAXPGPATH]; /* full path to postgres
@@ -85,27 +74,3 @@ bool allowSystemTableMods = false;
int SortMem = 512;
int VacuumMem = 8192;
int NBuffers = DEF_NBUFFERS;
/* ----------------
* List of relations that are shared across all databases in an installation.
*
* This used to be binary-searched, requiring that it be kept in sorted order.
* We just do a linear search now so there's no requirement that the list
* be ordered. The list is so small it shouldn't make much difference.
* make sure the list is null-terminated
* - jolly 8/19/95
* ----------------
*/
char *SharedSystemRelationNames[] = {
DatabaseRelationName,
DatabaseNameIndex,
DatabaseOidIndex,
GroupRelationName,
GroupNameIndex,
GroupSysidIndex,
ShadowRelationName,
ShadowNameIndex,
ShadowSysidIndex,
NULL
};

5
src/backend/utils/init/miscinit.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/init/miscinit.c,v 1.86 2002/04/04 04:25:49 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/init/miscinit.c,v 1.87 2002/04/27 21:24:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -612,9 +612,8 @@ InitializeSessionUserId(const char *username)
Anum_pg_shadow_useconfig, &isnull);
if (!isnull)
{
ArrayType *a;
ArrayType *a = DatumGetArrayTypeP(datum);
a = (ArrayType *) pg_detoast_datum((struct varlena *)datum);
ProcessGUCArray(a, PGC_S_USER);
}

7
src/backend/utils/init/postinit.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/init/postinit.c,v 1.102 2002/04/01 03:34:26 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/init/postinit.c,v 1.103 2002/04/27 21:24:34 tgl Exp $
*
*
*-------------------------------------------------------------------------
@@ -138,7 +138,7 @@ ReverifyMyDatabase(const char *name)
#endif
/*
* Set up datbase-specific configuration variables.
* Set up database-specific configuration variables.
*/
if (IsUnderPostmaster)
{
@@ -149,9 +149,8 @@ ReverifyMyDatabase(const char *name)
RelationGetDescr(pgdbrel), &isnull);
if (!isnull)
{
ArrayType *a;
ArrayType *a = DatumGetArrayTypeP(datum);
a = (ArrayType *) pg_detoast_datum((struct varlena *)datum);
ProcessGUCArray(a, PGC_S_DATABASE);
}
}