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Reimplement temp tables using schemas. The temp table map is history;

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temp table entries in pg_class have the names the user would expect.
This commit is contained in:
Tom Lane 2002-03-31 06:26:32 +00:00
parent 5f4745adf4
commit 3114102521
29 changed files with 596 additions and 670 deletions
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7
src/backend/access/transam/xact.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.118 2002/03/15 19:20:29 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.119 2002/03/31 06:26:29 tgl Exp $
*
* NOTES
* Transaction aborts can now occur two ways:
@ -178,10 +178,9 @@
#include "utils/portal.h"
#include "utils/catcache.h"
#include "utils/relcache.h"
#include "utils/temprel.h"
#include "pgstat.h"
extern bool SharedBufferChanged;
static void AbortTransaction(void);
@ -999,7 +998,6 @@ CommitTransaction(void)
*/
RelationPurgeLocalRelation(true);
AtEOXact_temp_relations(true);
smgrDoPendingDeletes(true);
AtEOXact_SPI();
@ -1102,7 +1100,6 @@ AbortTransaction(void)
}
RelationPurgeLocalRelation(false);
AtEOXact_temp_relations(false);
smgrDoPendingDeletes(false);
AtEOXact_SPI();

4
src/backend/access/transam/xlogutils.c
View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlogutils.c,v 1.22 2002/03/02 21:39:20 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlogutils.c,v 1.23 2002/03/31 06:26:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -335,7 +335,7 @@ XLogOpenRelation(bool redo, RmgrId rmid, RelFileNode rnode)
{
res = _xl_new_reldesc();
sprintf(RelationGetPhysicalRelationName(&(res->reldata)), "%u", rnode.relNode);
sprintf(RelationGetRelationName(&(res->reldata)), "%u", rnode.relNode);
/* unexisting DB id */
res->reldata.rd_lockInfo.lockRelId.dbId = RecoveryDb;

5
src/backend/bootstrap/bootparse.y
View File

@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/bootstrap/bootparse.y,v 1.41 2002/03/26 19:15:16 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/bootstrap/bootparse.y,v 1.42 2002/03/31 06:26:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -184,7 +184,7 @@ Boot_CreateStmt:
reldesc = heap_create(LexIDStr($4),
PG_CATALOG_NAMESPACE,
tupdesc,
false, true, true);
true, true);
reldesc->rd_rel->relhasoids = ! ($3);
elog(DEBUG3, "bootstrap relation created");
}
@ -199,7 +199,6 @@ Boot_CreateStmt:
tupdesc,
RELKIND_RELATION,
! ($3),
false,
true);
elog(DEBUG3, "relation created with oid %u", id);
}

4
src/backend/catalog/aclchk.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/catalog/aclchk.c,v 1.60 2002/03/29 19:05:59 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/catalog/aclchk.c,v 1.61 2002/03/31 06:26:29 tgl Exp $
*
* NOTES
* See acl.h.
@ -40,7 +40,6 @@
#include "parser/parse_type.h"
#include "utils/acl.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
static void ExecuteGrantStmt_Table(GrantStmt *stmt);
@ -811,7 +810,6 @@ pg_class_aclcheck(Oid table_oid, Oid userid, AclMode mode)
relname = NameStr(((Form_pg_class) GETSTRUCT(tuple))->relname);
if ((mode & (ACL_INSERT | ACL_UPDATE | ACL_DELETE)) &&
!allowSystemTableMods && IsSystemRelationName(relname) &&
!is_temp_relname(relname) &&
!usecatupd)
{
#ifdef ACLDEBUG

87
src/backend/catalog/heap.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.193 2002/03/29 19:05:59 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.194 2002/03/31 06:26:29 tgl Exp $
*
*
* INTERFACE ROUTINES
@ -61,14 +61,12 @@
#include "utils/lsyscache.h"
#include "utils/relcache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
static void AddNewRelationTuple(Relation pg_class_desc,
Relation new_rel_desc,
Oid new_rel_oid, Oid new_type_oid,
char relkind, bool relhasoids,
char *temp_relname);
char relkind, bool relhasoids);
static void DeleteAttributeTuples(Relation rel);
static void DeleteRelationTuple(Relation rel);
static void DeleteTypeTuple(Relation rel);
@ -205,34 +203,29 @@ SystemAttributeByName(const char *attname, bool relhasoids)
*
* Remove the system relation specific code to elsewhere eventually.
*
* NOTE: if istemp is TRUE then heap_create will overwrite relname with
* the unique "real" name chosen for the temp relation.
*
* If storage_create is TRUE then heap_storage_create is called here,
* else caller must call heap_storage_create later.
* ----------------------------------------------------------------
*/
Relation
heap_create(char *relname,
heap_create(const char *relname,
Oid relnamespace,
TupleDesc tupDesc,
bool istemp,
bool storage_create,
bool allow_system_table_mods)
{
static unsigned int uniqueId = 0;
Oid relid;
Oid dbid = MyDatabaseId;
RelFileNode rnode;
bool nailme = false;
RelFileNode rnode;
Relation rel;
/*
* sanity checks
*/
if (relname && !allow_system_table_mods &&
IsSystemRelationName(relname) && IsNormalProcessingMode())
if (!allow_system_table_mods &&
IsSystemRelationName(relname) &&
IsNormalProcessingMode())
elog(ERROR, "invalid relation name \"%s\"; "
"the 'pg_' name prefix is reserved for system catalogs",
relname);
@ -291,16 +284,6 @@ heap_create(char *relname,
else
relid = newoid();
if (istemp)
{
/*
* replace relname of caller with a unique name for a temp
* relation
*/
snprintf(relname, NAMEDATALEN, "%s_%d_%u",
PG_TEMP_REL_PREFIX, (int) MyProcPid, uniqueId++);
}
/*
* For now, the physical identifier of the relation is the same as the
* logical identifier.
@ -528,8 +511,7 @@ AddNewRelationTuple(Relation pg_class_desc,
Oid new_rel_oid,
Oid new_type_oid,
char relkind,
bool relhasoids,
char *temp_relname)
bool relhasoids)
{
Form_pg_class new_rel_reltup;
HeapTuple tup;
@ -599,9 +581,6 @@ AddNewRelationTuple(Relation pg_class_desc,
*/
heap_insert(pg_class_desc, tup);
if (temp_relname)
create_temp_relation(temp_relname, tup);
if (!IsIgnoringSystemIndexes())
{
/*
@ -669,19 +648,17 @@ AddNewRelationType(const char *typeName,
* --------------------------------
*/
Oid
heap_create_with_catalog(char *relname,
heap_create_with_catalog(const char *relname,
Oid relnamespace,
TupleDesc tupdesc,
char relkind,
bool relhasoids,
bool istemp,
bool allow_system_table_mods)
{
Relation pg_class_desc;
Relation new_rel_desc;
Oid new_rel_oid;
Oid new_type_oid;
char *temp_relname = NULL;
/*
* sanity checks
@ -693,32 +670,17 @@ heap_create_with_catalog(char *relname,
CheckAttributeNames(tupdesc, relhasoids);
/* temp tables can mask non-temp tables */
if ((!istemp && get_relname_relid(relname, relnamespace)) ||
(istemp && is_temp_rel_name(relname)))
if (get_relname_relid(relname, relnamespace))
elog(ERROR, "Relation '%s' already exists", relname);
if (istemp)
{
/* save user relation name because heap_create changes it */
temp_relname = pstrdup(relname); /* save original value */
relname = palloc(NAMEDATALEN);
strcpy(relname, temp_relname); /* heap_create will change this */
}
/*
* Tell heap_create not to create a physical file; we'll do that below
* after all our catalog updates are done. (This isn't really
* necessary anymore, but we may as well avoid the cycles of creating
* and deleting the file in case we fail.)
*
* Note: The call to heap_create() changes relname for temp tables; it
* becomes the true physical relname. The call to
* heap_storage_create() does all the "real" work of creating the disk
* file for the relation.
*/
new_rel_desc = heap_create(relname, relnamespace, tupdesc,
istemp, false, allow_system_table_mods);
false, allow_system_table_mods);
/* Fetch the relation OID assigned by heap_create */
new_rel_oid = new_rel_desc->rd_att->attrs[0]->attrelid;
@ -740,8 +702,7 @@ heap_create_with_catalog(char *relname,
new_rel_oid,
new_type_oid,
relkind,
relhasoids,
temp_relname);
relhasoids);
/*
* since defining a relation also defines a complex type, we add a new
@ -780,12 +741,6 @@ heap_create_with_catalog(char *relname,
heap_close(new_rel_desc, NoLock); /* do not unlock till end of xact */
heap_close(pg_class_desc, RowExclusiveLock);
if (istemp)
{
pfree(relname);
pfree(temp_relname);
}
return new_rel_oid;
}
@ -1226,26 +1181,19 @@ heap_drop_with_catalog(Oid rid,
{
Relation rel;
Oid toasttableOid;
bool has_toasttable;
bool istemp;
int i;
/*
* Open and lock the relation.
*/
rel = heap_open(rid, AccessExclusiveLock);
has_toasttable = rel->rd_rel->reltoastrelid != InvalidOid;
toasttableOid = rel->rd_rel->reltoastrelid;
istemp = is_temp_rel_name(RelationGetRelationName(rel));
/*
* prevent deletion of system relations
*/
/* allow temp of pg_class? Guess so. */
if (!istemp &&
!allow_system_table_mods &&
IsSystemRelationName(RelationGetRelationName(rel)) &&
!is_temp_relname(RelationGetRelationName(rel)))
if (!allow_system_table_mods &&
IsSystemRelationName(RelationGetRelationName(rel)))
elog(ERROR, "System relation \"%s\" may not be dropped",
RelationGetRelationName(rel));
@ -1319,11 +1267,8 @@ heap_drop_with_catalog(Oid rid,
*/
RelationForgetRelation(rid);
/* and from the temp-table map */
if (istemp)
remove_temp_rel_by_relid(rid);
if (has_toasttable)
/* If it has a toast table, recurse to get rid of that too */
if (OidIsValid(toasttableOid))
heap_drop_with_catalog(toasttableOid, true);
}

41
src/backend/catalog/index.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/catalog/index.c,v 1.174 2002/03/26 19:15:28 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/catalog/index.c,v 1.175 2002/03/31 06:26:29 tgl Exp $
*
*
* INTERFACE ROUTINES
@ -33,6 +33,7 @@
#include "catalog/index.h"
#include "catalog/indexing.h"
#include "catalog/pg_index.h"
#include "catalog/pg_namespace.h"
#include "catalog/pg_opclass.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_type.h"
@ -51,7 +52,6 @@
#include "utils/lsyscache.h"
#include "utils/relcache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
/*
@ -69,7 +69,7 @@ static TupleDesc ConstructTupleDescriptor(Relation heapRelation,
int numatts, AttrNumber *attNums,
Oid *classObjectId);
static void ConstructIndexReldesc(Relation indexRelation, Oid amoid);
static void UpdateRelationRelation(Relation indexRelation, char *temp_relname);
static void UpdateRelationRelation(Relation indexRelation);
static void InitializeAttributeOids(Relation indexRelation,
int numatts, Oid indexoid);
static void AppendAttributeTuples(Relation indexRelation, int numatts);
@ -320,7 +320,8 @@ ConstructIndexReldesc(Relation indexRelation, Oid amoid)
indexRelation->rd_rel->relowner = GetUserId();
indexRelation->rd_rel->relam = amoid;
indexRelation->rd_rel->relisshared =
IsSharedSystemRelationName(RelationGetPhysicalRelationName(indexRelation));
(RelationGetNamespace(indexRelation) == PG_CATALOG_NAMESPACE) &&
IsSharedSystemRelationName(RelationGetRelationName(indexRelation));
indexRelation->rd_rel->relkind = RELKIND_INDEX;
indexRelation->rd_rel->relhasoids = false;
}
@ -330,7 +331,7 @@ ConstructIndexReldesc(Relation indexRelation, Oid amoid)
* ----------------------------------------------------------------
*/
static void
UpdateRelationRelation(Relation indexRelation, char *temp_relname)
UpdateRelationRelation(Relation indexRelation)
{
Relation pg_class;
HeapTuple tuple;
@ -350,16 +351,12 @@ UpdateRelationRelation(Relation indexRelation, char *temp_relname)
tuple->t_data->t_oid = RelationGetRelid(indexRelation);
heap_insert(pg_class, tuple);
if (temp_relname)
create_temp_relation(temp_relname, tuple);
/*
* During normal processing, we need to make sure that the system
* catalog indices are correct. Bootstrap (initdb) time doesn't
* require this, because we make sure that the indices are correct
* just before exiting.
*/
if (!IsIgnoringSystemIndexes())
{
CatalogOpenIndices(Num_pg_class_indices, Name_pg_class_indices, idescs);
@ -555,11 +552,10 @@ UpdateIndexRelation(Oid indexoid,
*/
Oid
index_create(Oid heapRelationId,
char *indexRelationName,
const char *indexRelationName,
IndexInfo *indexInfo,
Oid accessMethodObjectId,
Oid *classObjectId,
bool istemp,
bool primary,
bool allow_system_table_mods)
{
@ -568,7 +564,6 @@ index_create(Oid heapRelationId,
TupleDesc indexTupDesc;
Oid namespaceId;
Oid indexoid;
char *temp_relname = NULL;
SetReindexProcessing(false);
@ -591,8 +586,7 @@ index_create(Oid heapRelationId,
IsNormalProcessingMode())
elog(ERROR, "User-defined indexes on system catalogs are not supported");
if ((!istemp && get_relname_relid(indexRelationName, namespaceId)) ||
(istemp && is_temp_rel_name(indexRelationName)))
if (get_relname_relid(indexRelationName, namespaceId))
elog(ERROR, "index named \"%s\" already exists",
indexRelationName);
@ -608,22 +602,14 @@ index_create(Oid heapRelationId,
indexInfo->ii_KeyAttrNumbers,
classObjectId);
if (istemp)
{
/* save user relation name because heap_create changes it */
temp_relname = pstrdup(indexRelationName); /* save original */
indexRelationName = palloc(NAMEDATALEN);
strcpy(indexRelationName, temp_relname); /* heap_create will
* change this */
}
/*
* create the index relation
* create the index relation (but don't create storage yet)
*/
indexRelation = heap_create(indexRelationName,
namespaceId,
indexTupDesc,
istemp, false, allow_system_table_mods);
false,
allow_system_table_mods);
indexoid = RelationGetRelid(indexRelation);
/*
@ -645,7 +631,7 @@ index_create(Oid heapRelationId,
* (append RELATION tuple)
* ----------------
*/
UpdateRelationRelation(indexRelation, temp_relname);
UpdateRelationRelation(indexRelation);
/*
* We create the disk file for this relation here
@ -835,9 +821,6 @@ index_drop(Oid indexId)
heap_close(userHeapRelation, NoLock);
RelationForgetRelation(indexId);
/* if it's a temp index, clear the temp mapping table entry */
remove_temp_rel_by_relid(indexId);
}
/* ----------------------------------------------------------------

493
src/backend/catalog/namespace.c
View File

@ -13,20 +13,86 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/catalog/namespace.c,v 1.3 2002/03/30 01:02:41 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/catalog/namespace.c,v 1.4 2002/03/31 06:26:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/heapam.h"
#include "access/xact.h"
#include "catalog/catname.h"
#include "catalog/heap.h"
#include "catalog/namespace.h"
#include "catalog/pg_inherits.h"
#include "catalog/pg_namespace.h"
#include "catalog/pg_shadow.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "storage/backendid.h"
#include "utils/fmgroids.h"
#include "utils/lsyscache.h"
#include "utils/syscache.h"
/*
* The namespace search path is a possibly-empty list of namespace OIDs.
* In addition to the explicit list, the TEMP table namespace is always
* implicitly searched first (if it's been initialized). Also, the system
* catalog namespace is always searched. If the system namespace is
* explicitly present in the path then it will be searched in the specified
* order; otherwise it will be searched after TEMP tables and *before* the
* explicit list. (It might seem that the system namespace should be
* implicitly last, but this behavior appears to be required by SQL99.
* Also, this provides a way to search the system namespace first without
* thereby making it the default creation target namespace.)
*
* The default creation target namespace is kept equal to the first element
* of the explicit list, or is the system namespace if the list is empty.
*
* In bootstrap mode or a standalone backend, the default search path is
* empty, so that the system namespace is the only one searched or inserted
* into. In multiuser mode, the default search path contains the PG_PUBLIC
* namespace, preceded by the user's own namespace if one exists.
*/
static List *namespaceSearchPath = NIL;
/* this flag must be updated correctly when namespaceSearchPath is changed */
static bool pathContainsSystemNamespace = false;
/* default place to create stuff */
static Oid defaultCreationNamespace = PG_CATALOG_NAMESPACE;
/*
* myTempNamespace is InvalidOid until and unless a TEMP namespace is set up
* in a particular backend session (this happens when a CREATE TEMP TABLE
* command is first executed). Thereafter it's the OID of the temp namespace.
*/
static Oid myTempNamespace = InvalidOid;
/*
* Deletion ordering constraint item.
*/
typedef struct DelConstraint
{
Oid referencer; /* table to delete first */
Oid referencee; /* table to delete second */
int pred; /* workspace for TopoSortRels */
struct DelConstraint *link; /* workspace for TopoSortRels */
} DelConstraint;
/* Local functions */
static Oid GetTempTableNamespace(void);
static void RemoveTempRelations(Oid tempNamespaceId);
static List *FindTempRelations(Oid tempNamespaceId);
static List *FindDeletionConstraints(List *relOids);
static List *TopoSortRels(List *relOids, List *constraintList);
static void RemoveTempRelationsCallback(void);
/*
* RangeVarGetRelid
* Given a RangeVar describing an existing relation,
@ -52,6 +118,7 @@ RangeVarGetRelid(const RangeVar *relation, bool failOK)
if (relation->schemaname)
{
/* use exact schema given */
namespaceId = GetSysCacheOid(NAMESPACENAME,
CStringGetDatum(relation->schemaname),
0, 0, 0);
@ -62,6 +129,7 @@ RangeVarGetRelid(const RangeVar *relation, bool failOK)
}
else
{
/* search the namespace path */
relId = RelnameGetRelid(relation->relname);
}
@ -100,8 +168,20 @@ RangeVarGetCreationNamespace(const RangeVar *newRelation)
elog(ERROR, "Cross-database references are not implemented");
}
if (newRelation->istemp)
{
/* TEMP tables are created in our backend-local temp namespace */
if (newRelation->schemaname)
elog(ERROR, "TEMP tables may not specify a namespace");
/* Initialize temp namespace if first time through */
if (!OidIsValid(myTempNamespace))
myTempNamespace = GetTempTableNamespace();
return myTempNamespace;
}
if (newRelation->schemaname)
{
/* use exact schema given */
namespaceId = GetSysCacheOid(NAMESPACENAME,
CStringGetDatum(newRelation->schemaname),
0, 0, 0);
@ -111,8 +191,8 @@ RangeVarGetCreationNamespace(const RangeVar *newRelation)
}
else
{
/* XXX Wrong! Need to get a default schema from somewhere */
namespaceId = PG_CATALOG_NAMESPACE;
/* use the default creation namespace */
namespaceId = defaultCreationNamespace;
}
return namespaceId;
@ -126,23 +206,91 @@ RangeVarGetCreationNamespace(const RangeVar *newRelation)
Oid
RelnameGetRelid(const char *relname)
{
/* XXX Wrong! must search search path */
return get_relname_relid(relname, PG_CATALOG_NAMESPACE);
Oid relid;
List *lptr;
/*
* If a TEMP-table namespace has been set up, it is implicitly first
* in the search path.
*/
if (OidIsValid(myTempNamespace))
{
relid = get_relname_relid(relname, myTempNamespace);
if (OidIsValid(relid))
return relid;
}
/*
* If system namespace is not in path, implicitly search it before path
*/
if (!pathContainsSystemNamespace)
{
relid = get_relname_relid(relname, PG_CATALOG_NAMESPACE);
if (OidIsValid(relid))
return relid;
}
/*
* Else search the path
*/
foreach(lptr, namespaceSearchPath)
{
Oid namespaceId = (Oid) lfirsti(lptr);
relid = get_relname_relid(relname, namespaceId);
if (OidIsValid(relid))
return relid;
}
/* Not found in path */
return InvalidOid;
}
/*
* TypenameGetTypid
* Try to resolve an unqualified datatype name.
* Returns OID if type found in search path, else InvalidOid.
*
* This is essentially the same as RelnameGetRelid, but we never search
* the TEMP table namespace --- there is no reason to refer to the types
* of temp tables, AFAICS.
*/
Oid
TypenameGetTypid(const char *typname)
{
/* XXX wrong, should use namespace search */
return GetSysCacheOid(TYPENAMENSP,
PointerGetDatum(typname),
ObjectIdGetDatum(PG_CATALOG_NAMESPACE),
0, 0);
Oid typid;
List *lptr;
/*
* If system namespace is not in path, implicitly search it before path
*/
if (!pathContainsSystemNamespace)
{
typid = GetSysCacheOid(TYPENAMENSP,
PointerGetDatum(typname),
ObjectIdGetDatum(PG_CATALOG_NAMESPACE),
0, 0);
if (OidIsValid(typid))
return typid;
}
/*
* Else search the path
*/
foreach(lptr, namespaceSearchPath)
{
Oid namespaceId = (Oid) lfirsti(lptr);
typid = GetSysCacheOid(TYPENAMENSP,
PointerGetDatum(typname),
ObjectIdGetDatum(namespaceId),
0, 0);
if (OidIsValid(typid))
return typid;
}
/* Not found in path */
return InvalidOid;
}
/*
@ -150,6 +298,9 @@ TypenameGetTypid(const char *typname)
* Given a possibly-qualified name for an object (in List-of-Values
* format), determine what namespace the object should be created in.
* Also extract and return the object name (last component of list).
*
* This is *not* used for tables. Hence, the TEMP table namespace is
* never selected as the creation target.
*/
Oid
QualifiedNameGetCreationNamespace(List *names, char **objname_p)
@ -186,6 +337,7 @@ QualifiedNameGetCreationNamespace(List *names, char **objname_p)
if (schemaname)
{
/* use exact schema given */
namespaceId = GetSysCacheOid(NAMESPACENAME,
CStringGetDatum(schemaname),
0, 0, 0);
@ -195,8 +347,8 @@ QualifiedNameGetCreationNamespace(List *names, char **objname_p)
}
else
{
/* XXX Wrong! Need to get a default schema from somewhere */
namespaceId = PG_CATALOG_NAMESPACE;
/* use the default creation namespace */
namespaceId = defaultCreationNamespace;
}
*objname_p = objname;
@ -233,3 +385,320 @@ makeRangeVarFromNameList(List *names)
return rel;
}
/*
* isTempNamespace - is the given namespace my temporary-table namespace?
*/
bool
isTempNamespace(Oid namespaceId)
{
if (OidIsValid(myTempNamespace) && myTempNamespace == namespaceId)
return true;
return false;
}
/*
* GetTempTableNamespace
* Initialize temp table namespace on first use in a particular backend
*/
static Oid
GetTempTableNamespace(void)
{
char namespaceName[NAMEDATALEN];
Oid namespaceId;
snprintf(namespaceName, NAMEDATALEN, "pg_temp_%d", MyBackendId);
namespaceId = GetSysCacheOid(NAMESPACENAME,
CStringGetDatum(namespaceName),
0, 0, 0);
if (!OidIsValid(namespaceId))
{
/*
* First use of this temp namespace in this database; create it.
* The temp namespaces are always owned by the superuser.
*/
namespaceId = NamespaceCreate(namespaceName, BOOTSTRAP_USESYSID);
/* Advance command counter to make namespace visible */
CommandCounterIncrement();
}
else
{
/*
* If the namespace already exists, clean it out (in case the
* former owner crashed without doing so).
*/
RemoveTempRelations(namespaceId);
}
/*
* Register exit callback to clean out temp tables at backend shutdown.
*/
on_shmem_exit(RemoveTempRelationsCallback, 0);
return namespaceId;
}
/*
* Remove all relations in the specified temp namespace.
*
* This is called at backend shutdown (if we made any temp relations).
* It is also called when we begin using a pre-existing temp namespace,
* in order to clean out any relations that might have been created by
* a crashed backend.
*/
static void
RemoveTempRelations(Oid tempNamespaceId)
{
List *tempRelList;
List *constraintList;
List *lptr;
/* Get a list of relations to delete */
tempRelList = FindTempRelations(tempNamespaceId);
if (tempRelList == NIL)
return; /* nothing to do */
/* If more than one, sort them to respect any deletion-order constraints */
if (length(tempRelList) > 1)
{
constraintList = FindDeletionConstraints(tempRelList);
if (constraintList != NIL)
tempRelList = TopoSortRels(tempRelList, constraintList);
}
/* Scan the list and delete all entries */
foreach(lptr, tempRelList)
{
Oid reloid = (Oid) lfirsti(lptr);
heap_drop_with_catalog(reloid, true);
/*
* Advance cmd counter to make catalog changes visible, in case
* a later entry depends on this one.
*/
CommandCounterIncrement();
}
}
/*
* Find all relations in the specified temp namespace.
*
* Returns a list of relation OIDs.
*/
static List *
FindTempRelations(Oid tempNamespaceId)
{
List *tempRelList = NIL;
Relation pgclass;
HeapScanDesc scan;
HeapTuple tuple;
ScanKeyData key;
/*
* Scan pg_class to find all the relations in the target namespace.
* Ignore indexes, though, on the assumption that they'll go away
* when their tables are deleted.
*/
ScanKeyEntryInitialize(&key, 0x0,
Anum_pg_class_relnamespace,
F_OIDEQ,
ObjectIdGetDatum(tempNamespaceId));
pgclass = heap_openr(RelationRelationName, AccessShareLock);
scan = heap_beginscan(pgclass, false, SnapshotNow, 1, &key);
while (HeapTupleIsValid(tuple = heap_getnext(scan, 0)))
{
switch (((Form_pg_class) GETSTRUCT(tuple))->relkind)
{
case RELKIND_RELATION:
case RELKIND_SEQUENCE:
case RELKIND_VIEW:
tempRelList = lconsi(tuple->t_data->t_oid, tempRelList);
break;
default:
break;
}
}
heap_endscan(scan);
heap_close(pgclass, AccessShareLock);
return tempRelList;
}
/*
* Find deletion-order constraints involving the given relation OIDs.
*
* Returns a list of DelConstraint objects.
*/
static List *
FindDeletionConstraints(List *relOids)
{
List *constraintList = NIL;
Relation inheritsrel;
HeapScanDesc scan;
HeapTuple tuple;
/*
* Scan pg_inherits to find parents and children that are in the list.
*/
inheritsrel = heap_openr(InheritsRelationName, AccessShareLock);
scan = heap_beginscan(inheritsrel, 0, SnapshotNow, 0, NULL);
while (HeapTupleIsValid(tuple = heap_getnext(scan, 0)))
{
Oid inhrelid = ((Form_pg_inherits) GETSTRUCT(tuple))->inhrelid;
Oid inhparent = ((Form_pg_inherits) GETSTRUCT(tuple))->inhparent;
if (intMember(inhrelid, relOids) && intMember(inhparent, relOids))
{
DelConstraint *item;
item = (DelConstraint *) palloc(sizeof(DelConstraint));
item->referencer = inhrelid;
item->referencee = inhparent;
constraintList = lcons(item, constraintList);
}
}
heap_endscan(scan);
heap_close(inheritsrel, AccessShareLock);
return constraintList;
}
/*
* TopoSortRels -- topological sort of a list of rels to delete
*
* This is a lot simpler and slower than, for example, the topological sort
* algorithm shown in Knuth's Volume 1. However, we are not likely to be
* working with more than a few constraints, so the apparent slowness of the
* algorithm won't really matter.
*/
static List *
TopoSortRels(List *relOids, List *constraintList)
{
int queue_size = length(relOids);
Oid *rels;
int *beforeConstraints;
DelConstraint **afterConstraints;
List *resultList = NIL;
List *lptr;
int i,
j,
k,
last;
/* Allocate workspace */
rels = (Oid *) palloc(queue_size * sizeof(Oid));
beforeConstraints = (int *) palloc(queue_size * sizeof(int));
afterConstraints = (DelConstraint **)
palloc(queue_size * sizeof(DelConstraint*));
/* Build an array of the target relation OIDs */
i = 0;
foreach(lptr, relOids)
{
rels[i++] = (Oid) lfirsti(lptr);
}
/*
* Scan the constraints, and for each rel in the array, generate a
* count of the number of constraints that say it must be before
* something else, plus a list of the constraints that say it must be
* after something else. The count for the j'th rel is stored in
* beforeConstraints[j], and the head of its list in
* afterConstraints[j]. Each constraint stores its list link in
* its link field (note any constraint will be in just one list).
* The array index for the before-rel of each constraint is
* remembered in the constraint's pred field.
*/
MemSet(beforeConstraints, 0, queue_size * sizeof(int));
MemSet(afterConstraints, 0, queue_size * sizeof(DelConstraint*));
foreach(lptr, constraintList)
{
DelConstraint *constraint = (DelConstraint *) lfirst(lptr);
Oid rel;
/* Find the referencer rel in the array */
rel = constraint->referencer;
for (j = queue_size; --j >= 0;)
{
if (rels[j] == rel)
break;
}
Assert(j >= 0); /* should have found a match */
/* Find the referencee rel in the array */
rel = constraint->referencee;
for (k = queue_size; --k >= 0;)
{
if (rels[k] == rel)
break;
}
Assert(k >= 0); /* should have found a match */
beforeConstraints[j]++; /* referencer must come before */
/* add this constraint to list of after-constraints for referencee */
constraint->pred = j;
constraint->link = afterConstraints[k];
afterConstraints[k] = constraint;
}
/*--------------------
* Now scan the rels array backwards. At each step, output the
* last rel that has no remaining before-constraints, and decrease
* the beforeConstraints count of each of the rels it was constrained
* against. (This is the right order since we are building the result
* list back-to-front.)
* i = counter for number of rels left to output
* j = search index for rels[]
* dc = temp for scanning constraint list for rel j
* last = last valid index in rels (avoid redundant searches)
*--------------------
*/
last = queue_size - 1;
for (i = queue_size; --i >= 0;)
{
DelConstraint *dc;
/* Find next candidate to output */
while (rels[last] == InvalidOid)
last--;
for (j = last; j >= 0; j--)
{
if (rels[j] != InvalidOid && beforeConstraints[j] == 0)
break;
}
/* If no available candidate, topological sort fails */
if (j < 0)
elog(ERROR, "TopoSortRels: failed to find a workable deletion ordering");
/* Output candidate, and mark it done by zeroing rels[] entry */
resultList = lconsi(rels[j], resultList);
rels[j] = InvalidOid;
/* Update beforeConstraints counts of its predecessors */
for (dc = afterConstraints[j]; dc; dc = dc->link)
beforeConstraints[dc->pred]--;
}
/* Done */
return resultList;
}
/*
* Callback to remove temp relations at backend exit.
*/
static void
RemoveTempRelationsCallback(void)
{
if (OidIsValid(myTempNamespace)) /* should always be true */
{
/* Need to ensure we have a usable transaction. */
AbortOutOfAnyTransaction();
StartTransactionCommand();
RemoveTempRelations(myTempNamespace);
CommitTransactionCommand();
}
}

7
src/backend/catalog/pg_namespace.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/catalog/pg_namespace.c,v 1.1 2002/03/22 21:34:44 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/catalog/pg_namespace.c,v 1.2 2002/03/31 06:26:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -18,7 +18,6 @@
#include "catalog/catname.h"
#include "catalog/indexing.h"
#include "catalog/pg_namespace.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#include "utils/syscache.h"
@ -28,7 +27,7 @@
* ---------------
*/
Oid
NamespaceCreate(const char *nspName)
NamespaceCreate(const char *nspName, int32 ownerSysId)
{
Relation nspdesc;
HeapTuple tup;
@ -57,7 +56,7 @@ NamespaceCreate(const char *nspName)
}
namestrcpy(&nname, nspName);
values[Anum_pg_namespace_nspname - 1] = NameGetDatum(&nname);
values[Anum_pg_namespace_nspowner - 1] = Int32GetDatum(GetUserId());
values[Anum_pg_namespace_nspowner - 1] = Int32GetDatum(ownerSysId);
nulls[Anum_pg_namespace_nspacl - 1] = 'n';
nspdesc = heap_openr(NamespaceRelationName, RowExclusiveLock);

21
src/backend/commands/cluster.c
View File

@ -15,7 +15,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.75 2002/03/29 22:10:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.76 2002/03/31 06:26:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -35,12 +35,10 @@
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
static Oid copy_heap(Oid OIDOldHeap, char *NewName, bool istemp);
static void copy_index(Oid OIDOldIndex, Oid OIDNewHeap, char *NewIndexName,
bool istemp);
static Oid copy_heap(Oid OIDOldHeap, char *NewName);
static void copy_index(Oid OIDOldIndex, Oid OIDNewHeap, char *NewIndexName);
static void rebuildheap(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex);
/*
@ -63,7 +61,6 @@ cluster(RangeVar *oldrelation, char *oldindexname)
OIDNewHeap;
Relation OldHeap,
OldIndex;
bool istemp;
char NewHeapName[NAMEDATALEN];
char NewIndexName[NAMEDATALEN];
RangeVar *NewHeap;
@ -76,8 +73,6 @@ cluster(RangeVar *oldrelation, char *oldindexname)
OldHeap = heap_openrv(oldrelation, AccessExclusiveLock);
OIDOldHeap = RelationGetRelid(OldHeap);
istemp = is_temp_rel_name(oldrelation->relname);
/*
* The index is expected to be in the same namespace as the relation.
*/
@ -105,7 +100,7 @@ cluster(RangeVar *oldrelation, char *oldindexname)
*/
snprintf(NewHeapName, NAMEDATALEN, "temp_%u", OIDOldHeap);
OIDNewHeap = copy_heap(OIDOldHeap, NewHeapName, istemp);
OIDNewHeap = copy_heap(OIDOldHeap, NewHeapName);
/* We do not need CommandCounterIncrement() because copy_heap did it. */
@ -120,7 +115,7 @@ cluster(RangeVar *oldrelation, char *oldindexname)
/* Create new index over the tuples of the new heap. */
snprintf(NewIndexName, NAMEDATALEN, "temp_%u", OIDOldIndex);
copy_index(OIDOldIndex, OIDNewHeap, NewIndexName, istemp);
copy_index(OIDOldIndex, OIDNewHeap, NewIndexName);
CommandCounterIncrement();
@ -145,7 +140,7 @@ cluster(RangeVar *oldrelation, char *oldindexname)
}
static Oid
copy_heap(Oid OIDOldHeap, char *NewName, bool istemp)
copy_heap(Oid OIDOldHeap, char *NewName)
{
TupleDesc OldHeapDesc,
tupdesc;
@ -166,7 +161,6 @@ copy_heap(Oid OIDOldHeap, char *NewName, bool istemp)
tupdesc,
OldHeap->rd_rel->relkind,
OldHeap->rd_rel->relhasoids,
istemp,
allowSystemTableMods);
/*
@ -188,7 +182,7 @@ copy_heap(Oid OIDOldHeap, char *NewName, bool istemp)
}
static void
copy_index(Oid OIDOldIndex, Oid OIDNewHeap, char *NewIndexName, bool istemp)
copy_index(Oid OIDOldIndex, Oid OIDNewHeap, char *NewIndexName)
{
Relation OldIndex,
NewHeap;
@ -209,7 +203,6 @@ copy_index(Oid OIDOldIndex, Oid OIDNewHeap, char *NewIndexName, bool istemp)
indexInfo,
OldIndex->rd_rel->relam,
OldIndex->rd_index->indclass,
istemp,
OldIndex->rd_index->indisprimary,
allowSystemTableMods);

30
src/backend/commands/command.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/command.c,v 1.168 2002/03/30 01:02:41 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/command.c,v 1.169 2002/03/31 06:26:30 tgl Exp $
*
* NOTES
* The PerformAddAttribute() code, like most of the relation
@ -55,7 +55,7 @@
#include "utils/lsyscache.h"
#include "utils/syscache.h"
#include "utils/relcache.h"
#include "utils/temprel.h"
static void drop_default(Oid relid, int16 attnum);
static bool needs_toast_table(Relation rel);
@ -1344,20 +1344,27 @@ AlterTableAddConstraint(Oid myrelid,
List *list;
int count;
if (is_temp_rel_name(fkconstraint->pktable->relname) &&
!is_temp_rel_name(RelationGetRelationName(rel)))
elog(ERROR, "ALTER TABLE / ADD CONSTRAINT: Unable to reference temporary table from permanent table constraint.");
/*
* Grab an exclusive lock on the pk table, so that
* someone doesn't delete rows out from under us.
*
* XXX wouldn't a lesser lock be sufficient?
*/
pkrel = heap_openrv(fkconstraint->pktable,
AccessExclusiveLock);
/*
* Validity checks
*/
if (pkrel->rd_rel->relkind != RELKIND_RELATION)
elog(ERROR, "referenced table \"%s\" not a relation",
fkconstraint->pktable->relname);
if (isTempNamespace(RelationGetNamespace(pkrel)) &&
!isTempNamespace(RelationGetNamespace(rel)))
elog(ERROR, "ALTER TABLE / ADD CONSTRAINT: Unable to reference temporary table from permanent table constraint.");
/* Don't need pkrel open anymore, but hold lock */
heap_close(pkrel, NoLock);
/*
@ -1763,8 +1770,9 @@ AlterTableCreateToastTable(Oid relOid, bool silent)
toast_relid = heap_create_with_catalog(toast_relname,
PG_TOAST_NAMESPACE,
tupdesc,
RELKIND_TOASTVALUE, false,
false, true);
RELKIND_TOASTVALUE,
false,
true);
/* make the toast relation visible, else index creation will fail */
CommandCounterIncrement();
@ -1794,7 +1802,7 @@ AlterTableCreateToastTable(Oid relOid, bool silent)
toast_idxid = index_create(toast_relid, toast_idxname, indexInfo,
BTREE_AM_OID, classObjectId,
false, true, true);
true, true);
/*
* Update toast rel's pg_class entry to show that it has an index. The
@ -1971,7 +1979,7 @@ CreateSchemaCommand(CreateSchemaStmt *stmt)
}
/* Create the schema's namespace */
NamespaceCreate(schemaName);
NamespaceCreate(schemaName, owner_userid);
/* Let commands in the schema-element-list know about the schema */
CommandCounterIncrement();

10
src/backend/commands/creatinh.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/creatinh.c,v 1.94 2002/03/29 22:10:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/creatinh.c,v 1.95 2002/03/31 06:26:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -30,7 +30,7 @@
#include "parser/parse_type.h"
#include "utils/acl.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
/* ----------------
* local stuff
@ -157,11 +157,11 @@ DefineRelation(CreateStmt *stmt, char relkind)
}
}
relationId = heap_create_with_catalog(relname, namespaceId,
relationId = heap_create_with_catalog(relname,
namespaceId,
descriptor,
relkind,
stmt->hasoids || parentHasOids,
stmt->relation->istemp,
allowSystemTableMods);
StoreCatalogInheritance(relationId, inheritOids);
@ -447,7 +447,7 @@ MergeAttributes(List *schema, List *supers, bool istemp,
elog(ERROR, "CREATE TABLE: inherited relation \"%s\" is not a table",
parent->relname);
/* Permanent rels cannot inherit from temporary ones */
if (!istemp && is_temp_rel_name(parent->relname))
if (!istemp && isTempNamespace(RelationGetNamespace(relation)))
elog(ERROR, "CREATE TABLE: cannot inherit from temp relation \"%s\"",
parent->relname);

6
src/backend/commands/indexcmds.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/indexcmds.c,v 1.65 2002/03/26 19:15:41 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/indexcmds.c,v 1.66 2002/03/31 06:26:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -33,7 +33,6 @@
#include "utils/fmgroids.h"
#include "utils/lsyscache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
#define IsFuncIndex(ATTR_LIST) (((IndexElem*)lfirst(ATTR_LIST))->args != NIL)
@ -74,7 +73,6 @@ DefineIndex(RangeVar *heapRelation,
Oid *classObjectId;
Oid accessMethodId;
Oid relationId;
bool istemp = is_temp_rel_name(heapRelation->relname);
Relation rel;
HeapTuple tuple;
Form_pg_am accessMethodForm;
@ -191,7 +189,7 @@ DefineIndex(RangeVar *heapRelation,
index_create(relationId, indexRelationName,
indexInfo, accessMethodId, classObjectId,
istemp, primary, allowSystemTableMods);
primary, allowSystemTableMods);
/*
* We update the relation's pg_class tuple even if it already has

10
src/backend/commands/rename.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/rename.c,v 1.66 2002/03/29 19:06:07 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/rename.c,v 1.67 2002/03/31 06:26:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -39,7 +39,6 @@
#include "utils/lsyscache.h"
#include "utils/relcache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
#define RI_TRIGGER_PK 1 /* is a trigger on the PK relation */
@ -270,13 +269,6 @@ renamerel(const RangeVar *relation, const char *newrelname)
elog(ERROR, "renamerel: Illegal class name: \"%s\" -- pg_ is reserved for system catalogs",
newrelname);
/*
* Check for renaming a temp table, which only requires altering the
* temp-table mapping, not the underlying table.
*/
if (rename_temp_relation(relation->relname, newrelname))
return; /* all done... */
/*
* Grab an exclusive lock on the target table or index, which we will
* NOT release until end of transaction.

4
src/backend/commands/trigger.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/trigger.c,v 1.109 2002/03/29 22:10:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/trigger.c,v 1.110 2002/03/31 06:26:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -471,7 +471,7 @@ RelationRemoveTriggers(Relation rel)
Form_pg_trigger pg_trigger = (Form_pg_trigger) GETSTRUCT(tup);
elog(NOTICE, "DROP TABLE implicitly drops referential integrity trigger from table \"%s\"",
get_temp_rel_by_physicalname(get_rel_name(pg_trigger->tgrelid)));
get_rel_name(pg_trigger->tgrelid));
DropTrigger(pg_trigger->tgrelid, NameStr(pg_trigger->tgname));

13
src/backend/commands/vacuum.c
View File

@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.219 2002/03/21 23:27:22 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.220 2002/03/31 06:26:30 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -42,8 +42,6 @@
#include "utils/inval.h"
#include "utils/relcache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
#include "pgstat.h"
@ -351,16 +349,9 @@ getrels(Name VacRelP, const char *stmttype)
* we could use the cache here, but it is clearer to use scankeys
* for both vacuum cases, bjm 2000/01/19
*/
char *nontemp_relname;
/* We must re-map temp table names bjm 2000-04-06 */
nontemp_relname = get_temp_rel_by_username(NameStr(*VacRelP));
if (nontemp_relname == NULL)
nontemp_relname = NameStr(*VacRelP);
ScanKeyEntryInitialize(&key, 0x0, Anum_pg_class_relname,
F_NAMEEQ,
PointerGetDatum(nontemp_relname));
PointerGetDatum(NameStr(*VacRelP)));
}
else
{

6
src/backend/executor/execMain.c
View File

@ -27,7 +27,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.155 2002/03/26 19:15:54 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.156 2002/03/31 06:26:31 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -724,8 +724,8 @@ InitPlan(CmdType operation, Query *parseTree, Plan *plan, EState *estate)
heap_create_with_catalog(intoName,
namespaceId,
tupdesc,
RELKIND_RELATION, true,
parseTree->into->istemp,
RELKIND_RELATION,
true,
allowSystemTableMods);
FreeTupleDesc(tupdesc);

6
src/backend/parser/analyze.c
View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.224 2002/03/29 19:06:10 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.225 2002/03/31 06:26:31 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -37,8 +37,6 @@
#include "utils/fmgroids.h"
#include "utils/relcache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
#ifdef MULTIBYTE
#include "mb/pg_wchar.h"
#endif
@ -2553,7 +2551,6 @@ transformAlterTableStmt(ParseState *pstate, AlterTableStmt *stmt,
cxt.stmtType = "ALTER TABLE";
cxt.relation = stmt->relation;
cxt.inhRelations = NIL;
cxt.relation->istemp = is_temp_rel_name(stmt->relation->relname);
cxt.relOid = RangeVarGetRelid(stmt->relation, false);
cxt.hasoids = SearchSysCacheExists(ATTNUM,
ObjectIdGetDatum(cxt.relOid),
@ -2583,7 +2580,6 @@ transformAlterTableStmt(ParseState *pstate, AlterTableStmt *stmt,
cxt.stmtType = "ALTER TABLE";
cxt.relation = stmt->relation;
cxt.inhRelations = NIL;
cxt.relation->istemp = is_temp_rel_name(stmt->relation->relname);
cxt.relOid = RangeVarGetRelid(stmt->relation, false);
cxt.hasoids = SearchSysCacheExists(ATTNUM,
ObjectIdGetDatum(cxt.relOid),

6
src/backend/tcop/utility.c
View File

@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.142 2002/03/29 22:10:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.143 2002/03/31 06:26:31 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -49,7 +49,6 @@
#include "utils/acl.h"
#include "utils/lsyscache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
#include "access/xlog.h"
/*
@ -128,8 +127,7 @@ CheckDropPermissions(RangeVar *rel, char rightkind)
elog(ERROR, "you do not own %s \"%s\"",
rentry->name, rel->relname);
if (!allowSystemTableMods && IsSystemRelationName(rel->relname) &&
!is_temp_relname(rel->relname))
if (!allowSystemTableMods && IsSystemRelationName(rel->relname))
elog(ERROR, "%s \"%s\" is a system %s",
rentry->name, rel->relname, rentry->name);

4
src/backend/utils/cache/Makefile vendored
View File

@ -4,7 +4,7 @@
# Makefile for utils/cache
#
# IDENTIFICATION
# $Header: /cvsroot/pgsql/src/backend/utils/cache/Makefile,v 1.15 2001/10/06 23:21:44 tgl Exp $
# $Header: /cvsroot/pgsql/src/backend/utils/cache/Makefile,v 1.16 2002/03/31 06:26:31 tgl Exp $
#
#-------------------------------------------------------------------------
@ -13,7 +13,7 @@ top_builddir = ../../../..
include $(top_builddir)/src/Makefile.global
OBJS = catcache.o inval.o relcache.o syscache.o lsyscache.o \
fcache.o temprel.o
fcache.o
all: SUBSYS.o

16
src/backend/utils/cache/relcache.c vendored
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.158 2002/03/26 19:16:10 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.159 2002/03/31 06:26:31 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -60,7 +60,6 @@
#include "utils/lsyscache.h"
#include "utils/relcache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
/*
@ -186,7 +185,7 @@ do { \
nodentry->reldesc = RELATION; \
if (RelationGetNamespace(RELATION) == PG_CATALOG_NAMESPACE) \
{ \
char *relname = RelationGetPhysicalRelationName(RELATION); \
char *relname = RelationGetRelationName(RELATION); \
RelNameCacheEnt *namehentry; \
namehentry = (RelNameCacheEnt*)hash_search(RelationSysNameCache, \
relname, \
@ -247,7 +246,7 @@ do { \
elog(WARNING, "trying to delete a reldesc that does not exist."); \
if (RelationGetNamespace(RELATION) == PG_CATALOG_NAMESPACE) \
{ \
char *relname = RelationGetPhysicalRelationName(RELATION); \
char *relname = RelationGetRelationName(RELATION); \
RelNameCacheEnt *namehentry; \
namehentry = (RelNameCacheEnt*)hash_search(RelationSysNameCache, \
relname, \
@ -1571,18 +1570,9 @@ RelationIdGetRelation(Oid relationId)
Relation
RelationSysNameGetRelation(const char *relationName)
{
char *temprelname;
Relation rd;
RelationBuildDescInfo buildinfo;
/*
* if caller is looking for a temp relation, substitute its real name;
* we only index temp rels by their real names.
*/
temprelname = get_temp_rel_by_username(relationName);
if (temprelname != NULL)
relationName = temprelname;
/*
* first try and get a reldesc from the cache
*/

27
src/backend/utils/cache/syscache.c vendored
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/syscache.c,v 1.71 2002/03/29 19:06:15 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/syscache.c,v 1.72 2002/03/31 06:26:32 tgl Exp $
*
* NOTES
* These routines allow the parser/planner/executor to perform
@ -42,7 +42,6 @@
#include "catalog/pg_type.h"
#include "utils/catcache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
#include "miscadmin.h"
@ -500,29 +499,9 @@ SearchSysCache(int cacheId,
Datum key3,
Datum key4)
{
if (cacheId < 0 || cacheId >= SysCacheSize)
{
if (cacheId < 0 || cacheId >= SysCacheSize ||
! PointerIsValid(SysCache[cacheId]))
elog(ERROR, "SearchSysCache: Bad cache id %d", cacheId);
return (HeapTuple) NULL;
}
Assert(PointerIsValid(SysCache[cacheId]));
/*
* If someone tries to look up a relname, translate temp relation
* names to real names. Less obviously, apply the same translation to
* type names, so that the type tuple of a temp table will be found
* when sought. This is a kluge ... temp table substitution should be
* happening at a higher level ...
*/
if (cacheId == RELNAMENSP || cacheId == TYPENAMENSP)
{
char *nontemp_relname;
nontemp_relname = get_temp_rel_by_username(DatumGetCString(key1));
if (nontemp_relname != NULL)
key1 = CStringGetDatum(nontemp_relname);
}
return SearchCatCache(SysCache[cacheId], key1, key2, key3, key4);
}

335
src/backend/utils/cache/temprel.c vendored
View File

@ -1,335 +0,0 @@
/*-------------------------------------------------------------------------
*
* temprel.c
* POSTGRES temporary relation handling
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/Attic/temprel.c,v 1.36 2002/03/29 19:06:16 tgl Exp $
*
*-------------------------------------------------------------------------
*/
/*
* This implements temp tables by modifying the relname cache lookups
* of pg_class.
*
* When a temp table is created, normal entries are made for it in pg_class,
* pg_type, etc using a unique "physical" relation name. We also make an
* entry in the temp table list maintained by this module. Subsequently,
* relname lookups are filtered through the temp table list, and attempts
* to look up a temp table name are changed to look up the physical name.
* This allows temp table names to mask a regular table of the same name
* for the duration of the session. The temp table list is also used
* to drop the underlying physical relations at session shutdown.
*/
#include "postgres.h"
#include <sys/types.h>
#include "catalog/heap.h"
#include "catalog/index.h"
#include "miscadmin.h"
#include "utils/temprel.h"
/* ----------------
* global variables
* ----------------
*/
static List *temp_rels = NIL;
typedef struct TempTable
{
NameData user_relname; /* logical name of temp table */
NameData relname; /* underlying unique name */
Oid relid; /* needed properties of rel */
char relkind;
/*
* If this entry was created during this xact, it should be deleted at
* xact abort. Conversely, if this entry was deleted during this
* xact, it should be removed at xact commit. We leave deleted
* entries in the list until commit so that we can roll back if needed
* --- but we ignore them for purposes of lookup!
*/
bool created_in_cur_xact;
bool deleted_in_cur_xact;
} TempTable;
/*
* Create a temp-relation list entry given the logical temp table name
* and the already-created pg_class tuple for the underlying relation.
*
* NB: we assume a check has already been made for a duplicate logical name.
*/
void
create_temp_relation(const char *relname, HeapTuple pg_class_tuple)
{
Form_pg_class pg_class_form = (Form_pg_class) GETSTRUCT(pg_class_tuple);
MemoryContext oldcxt;
TempTable *temp_rel;
oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
temp_rel = (TempTable *) palloc(sizeof(TempTable));
StrNCpy(NameStr(temp_rel->user_relname), relname,
NAMEDATALEN);
StrNCpy(NameStr(temp_rel->relname), NameStr(pg_class_form->relname),
NAMEDATALEN);
temp_rel->relid = pg_class_tuple->t_data->t_oid;
temp_rel->relkind = pg_class_form->relkind;
temp_rel->created_in_cur_xact = true;
temp_rel->deleted_in_cur_xact = false;
temp_rels = lcons(temp_rel, temp_rels);
MemoryContextSwitchTo(oldcxt);
}
/*
* Remove a temp relation map entry (part of DROP TABLE on a temp table).
* We don't actually remove the entry, just mark it dead.
*
* We don't have the relname for indexes, so we just pass the oid.
*/
void
remove_temp_rel_by_relid(Oid relid)
{
List *l;
foreach(l, temp_rels)
{
TempTable *temp_rel = (TempTable *) lfirst(l);
if (temp_rel->relid == relid)
temp_rel->deleted_in_cur_xact = true;
/*
* Keep scanning 'cause there could be multiple matches; see
* RENAME
*/
}
}
/*
* To implement ALTER TABLE RENAME on a temp table, we shouldn't touch
* the underlying physical table at all, just change the map entry!
*
* This routine is invoked early in ALTER TABLE RENAME to check for
* the temp-table case. If oldname matches a temp table name, change
* the mapping to the new logical name and return TRUE (or elog if
* there is a conflict with another temp table name). If there is
* no match, return FALSE indicating that normal rename should proceed.
*
* We also reject an attempt to rename a normal table to a name in use
* as a temp table name. That would fail later on anyway when rename.c
* looks for a rename conflict, but we can give a more specific error
* message for the problem here.
*
* It might seem that we need to check for attempts to rename the physical
* file underlying a temp table, but that'll be rejected anyway because
* pg_tempXXX looks like a system table name.
*/
bool
rename_temp_relation(const char *oldname,
const char *newname)
{
List *l;
foreach(l, temp_rels)
{
TempTable *temp_rel = (TempTable *) lfirst(l);
MemoryContext oldcxt;
TempTable *new_temp_rel;
if (temp_rel->deleted_in_cur_xact)
continue; /* ignore it if logically deleted */
if (strcmp(NameStr(temp_rel->user_relname), oldname) != 0)
continue; /* ignore non-matching entries */
/* We are renaming a temp table --- is it OK to do so? */
if (is_temp_rel_name(newname))
elog(ERROR, "Cannot rename temp table \"%s\": temp table \"%s\" already exists",
oldname, newname);
/*
* Create a new mapping entry and mark the old one deleted in this
* xact. One of these entries will be deleted at xact end.
*
* NOTE: the new mapping entry is inserted into the list just after
* the old one. We could alternatively insert it before the old
* one, but that'd take more code. It does need to be in one spot
* or the other, to ensure that deletion of temp rels happens in
* the right order during remove_all_temp_relations().
*/
oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
new_temp_rel = (TempTable *) palloc(sizeof(TempTable));
memcpy(new_temp_rel, temp_rel, sizeof(TempTable));
StrNCpy(NameStr(new_temp_rel->user_relname), newname, NAMEDATALEN);
new_temp_rel->created_in_cur_xact = true;
lnext(l) = lcons(new_temp_rel, lnext(l));
temp_rel->deleted_in_cur_xact = true;
MemoryContextSwitchTo(oldcxt);
return true;
}
/* Old name does not match any temp table name, what about new? */
if (is_temp_rel_name(newname))
elog(ERROR, "Cannot rename \"%s\" to \"%s\": a temp table by that name already exists",
oldname, newname);
return false;
}
/*
* Remove underlying relations for all temp rels at backend shutdown.
*/
void
remove_all_temp_relations(void)
{
List *l;
/* skip xact start overhead if nothing to do */
if (temp_rels == NIL)
return;
AbortOutOfAnyTransaction();
StartTransactionCommand();
/*
* Scan the list and delete all entries not already deleted. We need
* not worry about list entries getting deleted from under us, because
* remove_temp_rel_by_relid() doesn't remove entries, only mark them
* dead. Note that entries will be deleted in reverse order of
* creation --- that's critical for cases involving inheritance.
*/
foreach(l, temp_rels)
{
TempTable *temp_rel = (TempTable *) lfirst(l);
if (temp_rel->deleted_in_cur_xact)
continue; /* ignore it if deleted already */
if (temp_rel->relkind != RELKIND_INDEX)
heap_drop_with_catalog(temp_rel->relid, allowSystemTableMods);
else
index_drop(temp_rel->relid);
/* advance cmd counter to make catalog changes visible */
CommandCounterIncrement();
}
CommitTransactionCommand();
}
/*
* Clean up temprel mapping entries during transaction commit or abort.
*
* During commit, remove entries that were deleted during this transaction;
* during abort, remove those created during this transaction.
*
* We do not need to worry about removing the underlying physical relation;
* that's someone else's job.
*/
void
AtEOXact_temp_relations(bool isCommit)
{
List *l,
*prev;
prev = NIL;
l = temp_rels;
while (l != NIL)
{
TempTable *temp_rel = (TempTable *) lfirst(l);
if (isCommit ? temp_rel->deleted_in_cur_xact :
temp_rel->created_in_cur_xact)
{
/* This entry must be removed */
if (prev != NIL)
{
lnext(prev) = lnext(l);
pfree(l);
l = lnext(prev);
}
else
{
temp_rels = lnext(l);
pfree(l);
l = temp_rels;
}
pfree(temp_rel);
}
else
{
/* This entry must be preserved */
temp_rel->created_in_cur_xact = false;
temp_rel->deleted_in_cur_xact = false;
prev = l;
l = lnext(l);
}
}
}
/*
* Map user name to physical name --- returns NULL if no entry.
*
* This also supports testing whether a name is a temp table name;
* see is_temp_rel_name() macro.
*/
char *
get_temp_rel_by_username(const char *user_relname)
{
List *l;
foreach(l, temp_rels)
{
TempTable *temp_rel = (TempTable *) lfirst(l);
if (temp_rel->deleted_in_cur_xact)
continue; /* ignore it if logically deleted */
if (strcmp(NameStr(temp_rel->user_relname), user_relname) == 0)
return NameStr(temp_rel->relname);
}
return NULL;
}
/*
* Map physical name to user name --- returns pstrdup'd input if no match.
*/
char *
get_temp_rel_by_physicalname(const char *relname)
{
List *l;
foreach(l, temp_rels)
{
TempTable *temp_rel = (TempTable *) lfirst(l);
if (temp_rel->deleted_in_cur_xact)
continue; /* ignore it if logically deleted */
if (strcmp(NameStr(temp_rel->relname), relname) == 0)
return NameStr(temp_rel->user_relname);
}
/* needed for bootstrapping temp tables */
return pstrdup(relname);
}

18
src/backend/utils/init/postinit.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/init/postinit.c,v 1.100 2002/03/06 06:10:25 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/init/postinit.c,v 1.101 2002/03/31 06:26:32 tgl Exp $
*
*
*-------------------------------------------------------------------------
@ -39,7 +39,6 @@
#include "utils/portal.h"
#include "utils/relcache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
static void ReverifyMyDatabase(const char *name);
@ -386,20 +385,13 @@ InitPostgres(const char *dbname, const char *username)
RelationCacheInitializePhase3();
/*
* Set up process-exit callbacks to remove temp relations and then do
* pre-shutdown cleanup. This should be last because we want
* shmem_exit to call these routines before the exit callbacks that
* are registered by buffer manager, lock manager, etc. We need to
* run this code before we close down database access!
* Set up process-exit callback to do pre-shutdown cleanup. This should
* be last because we want shmem_exit to call this routine before the exit
* callbacks that are registered by buffer manager, lock manager, etc.
* We need to run this code before we close down database access!
*/
on_shmem_exit(ShutdownPostgres, 0);
/*
* because callbacks are called in reverse order, this gets done
* first:
*/
on_shmem_exit(remove_all_temp_relations, 0);
/* close the transaction we started above */
if (!bootstrap)
CommitTransactionCommand();

13
src/include/catalog/heap.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: heap.h,v 1.48 2002/03/29 19:06:17 tgl Exp $
* $Id: heap.h,v 1.49 2002/03/31 06:26:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -27,16 +27,19 @@ typedef struct RawColumnDefault
* tree) */
} RawColumnDefault;
extern Relation heap_create(char *relname, Oid relnamespace,
extern Relation heap_create(const char *relname,
Oid relnamespace,
TupleDesc tupDesc,
bool istemp, bool storage_create,
bool storage_create,
bool allow_system_table_mods);
extern void heap_storage_create(Relation rel);
extern Oid heap_create_with_catalog(char *relname, Oid relnamespace,
extern Oid heap_create_with_catalog(const char *relname,
Oid relnamespace,
TupleDesc tupdesc,
char relkind, bool relhasoids, bool istemp,
char relkind,
bool relhasoids,
bool allow_system_table_mods);
extern void heap_drop_with_catalog(Oid rid, bool allow_system_table_mods);

5
src/include/catalog/index.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: index.h,v 1.46 2002/03/26 19:16:25 tgl Exp $
* $Id: index.h,v 1.47 2002/03/31 06:26:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -30,11 +30,10 @@ typedef void (*IndexBuildCallback) (Relation index,
extern Oid index_create(Oid heapRelationId,
char *indexRelationName,
const char *indexRelationName,
IndexInfo *indexInfo,
Oid accessMethodObjectId,
Oid *classObjectId,
bool istemp,
bool primary,
bool allow_system_table_mods);

4
src/include/catalog/namespace.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: namespace.h,v 1.3 2002/03/30 01:02:42 tgl Exp $
* $Id: namespace.h,v 1.4 2002/03/31 06:26:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -29,4 +29,6 @@ extern Oid QualifiedNameGetCreationNamespace(List *names, char **objname_p);
extern RangeVar *makeRangeVarFromNameList(List *names);
extern bool isTempNamespace(Oid namespaceId);
#endif /* NAMESPACE_H */

6
src/include/catalog/pg_namespace.h
View File

@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: pg_namespace.h,v 1.2 2002/03/30 01:02:42 tgl Exp $
* $Id: pg_namespace.h,v 1.3 2002/03/31 06:26:32 tgl Exp $
*
* NOTES
* the genbki.sh script reads this file and generates .bki
@ -69,7 +69,7 @@ typedef FormData_pg_namespace *Form_pg_namespace;
DATA(insert OID = 11 ( "pg_catalog" PGUID "{=r}" ));
DESCR("System catalog namespace");
#define PG_CATALOG_NAMESPACE 11
DATA(insert OID = 99 ( "pg_toast" PGUID "{=r}" ));
DATA(insert OID = 99 ( "pg_toast" PGUID "{=}" ));
DESCR("Reserved namespace for TOAST tables");
#define PG_TOAST_NAMESPACE 99
DATA(insert OID = 2071 ( "pg_public" PGUID "{=rw}" ));
@ -80,6 +80,6 @@ DESCR("Standard public namespace");
/*
* prototypes for functions in pg_namespace.c
*/
extern Oid NamespaceCreate(const char *nspName);
extern Oid NamespaceCreate(const char *nspName, int32 ownerSysId);
#endif /* PG_NAMESPACE_H */

45
src/include/utils/rel.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: rel.h,v 1.57 2002/03/26 19:16:58 tgl Exp $
* $Id: rel.h,v 1.58 2002/03/31 06:26:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -238,49 +238,15 @@ typedef Relation *RelationPtr;
*/
#define RelationGetIndexStrategy(relation) ((relation)->rd_istrat)
/*
* Handle temp relations
*/
#define PG_TEMP_REL_PREFIX "pg_temp"
#define PG_TEMP_REL_PREFIX_LEN 7
#define is_temp_relname(relname) \
(strncmp(relname, PG_TEMP_REL_PREFIX, PG_TEMP_REL_PREFIX_LEN) == 0)
/*
* RelationGetPhysicalRelationName
*
* Returns the rel's physical name, ie, the name appearing in pg_class.
*
* While this name is unique across all rels in the database, it is not
* necessarily useful for accessing the rel, since a temp table of the
* same name might mask the rel. It is useful mainly for determining if
* the rel is a shared system rel or not.
*
* The macro is rather unfortunately named, since the pg_class name no longer
* has anything to do with the file name used for physical storage of the rel.
*/
#define RelationGetPhysicalRelationName(relation) \
(NameStr((relation)->rd_rel->relname))
/*
* RelationGetRelationName
*
* Returns the relation's logical name (as seen by the user).
* Returns the rel's name.
*
* If the rel is a temp rel, the temp name will be returned. Therefore,
* this name is not unique. But it is the name to use in heap_openr(),
* for example.
* Note that the name is only unique within the containing namespace.
*/
#define RelationGetRelationName(relation) \
(\
is_temp_relname(RelationGetPhysicalRelationName(relation)) \
? \
get_temp_rel_by_physicalname( \
RelationGetPhysicalRelationName(relation)) \
: \
RelationGetPhysicalRelationName(relation) \
)
(NameStr((relation)->rd_rel->relname))
/*
* RelationGetNamespace
@ -290,7 +256,4 @@ typedef Relation *RelationPtr;
#define RelationGetNamespace(relation) \
((relation)->rd_rel->relnamespace)
/* added to prevent circular dependency. bjm 1999/11/15 */
extern char *get_temp_rel_by_physicalname(const char *relname);
#endif /* REL_H */

33
src/include/utils/temprel.h
View File

@ -1,33 +0,0 @@
/*-------------------------------------------------------------------------
*
* temprel.h
* Temporary relation functions
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: temprel.h,v 1.20 2001/11/05 17:46:36 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef TEMPREL_H
#define TEMPREL_H
#include "access/htup.h"
extern void create_temp_relation(const char *relname,
HeapTuple pg_class_tuple);
extern void remove_temp_rel_by_relid(Oid relid);
extern bool rename_temp_relation(const char *oldname,
const char *newname);
extern void remove_all_temp_relations(void);
extern void AtEOXact_temp_relations(bool isCommit);
extern char *get_temp_rel_by_username(const char *user_relname);
extern char *get_temp_rel_by_physicalname(const char *relname);
#define is_temp_rel_name(relname) (get_temp_rel_by_username(relname) != NULL)
#endif /* TEMPREL_H */