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Commit790d5bc

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Change CREATE TABLE AS / SELECT INTO to create the new table with OIDs,
for backwards compatibility with pre-7.3 behavior. Per discussion onpgsql-general and pgsql-hackers.
1 parent742403b commit790d5bc

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3 files changed

+89
-70
lines changed

3 files changed

+89
-70
lines changed

‎src/backend/executor/execMain.c

Lines changed: 69 additions & 62 deletions
Original file line numberDiff line numberDiff line change
@@ -26,7 +26,7 @@
2626
*
2727
*
2828
* IDENTIFICATION
29-
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.198 2003/01/12 18:19:37petere Exp $
29+
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.199 2003/01/23 05:10:37tgl Exp $
3030
*
3131
*-------------------------------------------------------------------------
3232
*/
@@ -450,6 +450,7 @@ InitPlan(QueryDesc *queryDesc)
450450
PlanState*planstate;
451451
List*rangeTable;
452452
RelationintoRelationDesc;
453+
booldo_select_into;
453454
TupleDesctupType;
454455

455456
/*
@@ -529,6 +530,26 @@ InitPlan(QueryDesc *queryDesc)
529530
estate->es_result_relation_info=NULL;
530531
}
531532

533+
/*
534+
* Detect whether we're doing SELECT INTO. If so, set the force_oids
535+
* flag appropriately so that the plan tree will be initialized with
536+
* the correct tuple descriptors.
537+
*/
538+
do_select_into= false;
539+
540+
if (operation==CMD_SELECT&&
541+
!parseTree->isPortal&&
542+
parseTree->into!=NULL)
543+
{
544+
do_select_into= true;
545+
/*
546+
* For now, always create OIDs in SELECT INTO; this is for backwards
547+
* compatibility with pre-7.3 behavior. Eventually we might want
548+
* to allow the user to choose.
549+
*/
550+
estate->es_force_oids= true;
551+
}
552+
532553
/*
533554
* Have to lock relations selected for update
534555
*/
@@ -687,79 +708,64 @@ InitPlan(QueryDesc *queryDesc)
687708
}
688709

689710
/*
690-
* initialize the "into" relation
711+
* If doing SELECT INTO, initialize the "into" relation. We must wait
712+
* till now so we have the "clean" result tuple type to create the
713+
* new table from.
691714
*/
692715
intoRelationDesc= (Relation)NULL;
693716

694-
if (operation==CMD_SELECT)
717+
if (do_select_into)
695718
{
696-
if (!parseTree->isPortal)
697-
{
698-
/*
699-
* a select into table --- need to create the "into" table
700-
*/
701-
if (parseTree->into!=NULL)
702-
{
703-
char*intoName;
704-
OidnamespaceId;
705-
AclResultaclresult;
706-
OidintoRelationId;
707-
TupleDesctupdesc;
719+
char*intoName;
720+
OidnamespaceId;
721+
AclResultaclresult;
722+
OidintoRelationId;
723+
TupleDesctupdesc;
708724

709-
/*
710-
* find namespace to create in, check permissions
711-
*/
712-
intoName=parseTree->into->relname;
713-
namespaceId=RangeVarGetCreationNamespace(parseTree->into);
725+
/*
726+
* find namespace to create in, check permissions
727+
*/
728+
intoName=parseTree->into->relname;
729+
namespaceId=RangeVarGetCreationNamespace(parseTree->into);
714730

715-
aclresult=pg_namespace_aclcheck(namespaceId,GetUserId(),
716-
ACL_CREATE);
717-
if (aclresult!=ACLCHECK_OK)
718-
aclcheck_error(aclresult,
719-
get_namespace_name(namespaceId));
731+
aclresult=pg_namespace_aclcheck(namespaceId,GetUserId(),
732+
ACL_CREATE);
733+
if (aclresult!=ACLCHECK_OK)
734+
aclcheck_error(aclresult,get_namespace_name(namespaceId));
720735

721-
/*
722-
* have to copy tupType to get rid of constraints
723-
*/
724-
tupdesc=CreateTupleDescCopy(tupType);
725-
726-
/*
727-
* Formerly we forced the output table to have OIDs, but
728-
* as of 7.3 it will not have OIDs, because it's too late
729-
* here to change the tupdescs of the already-initialized
730-
* plan tree. (Perhaps we could recurse and change them
731-
* all, but it's not really worth the trouble IMHO...)
732-
*/
736+
/*
737+
* have to copy tupType to get rid of constraints
738+
*/
739+
tupdesc=CreateTupleDescCopy(tupType);
733740

734-
intoRelationId=
735-
heap_create_with_catalog(intoName,
736-
namespaceId,
737-
tupdesc,
738-
RELKIND_RELATION,
739-
false,
740-
ONCOMMIT_NOOP,
741-
allowSystemTableMods);
741+
intoRelationId=heap_create_with_catalog(intoName,
742+
namespaceId,
743+
tupdesc,
744+
RELKIND_RELATION,
745+
false,
746+
ONCOMMIT_NOOP,
747+
allowSystemTableMods);
742748

743-
FreeTupleDesc(tupdesc);
749+
FreeTupleDesc(tupdesc);
744750

745-
/*
746-
* Advance command counter so that the newly-created
747-
* relation's catalog tuples will be visible to heap_open.
748-
*/
749-
CommandCounterIncrement();
751+
/*
752+
* Advance command counter so that the newly-created
753+
* relation's catalog tuples will be visible to heap_open.
754+
*/
755+
CommandCounterIncrement();
750756

751-
/*
752-
* If necessary, create a TOAST table for the into
753-
* relation. Note that AlterTableCreateToastTable ends
754-
* with CommandCounterIncrement(), so that the TOAST table
755-
* will be visible for insertion.
756-
*/
757-
AlterTableCreateToastTable(intoRelationId, true);
757+
/*
758+
* If necessary, create a TOAST table for the into
759+
* relation. Note that AlterTableCreateToastTable ends
760+
* with CommandCounterIncrement(), so that the TOAST table
761+
* will be visible for insertion.
762+
*/
763+
AlterTableCreateToastTable(intoRelationId, true);
758764

759-
intoRelationDesc=heap_open(intoRelationId,
760-
AccessExclusiveLock);
761-
}
762-
}
765+
/*
766+
* And open the constructed table for writing.
767+
*/
768+
intoRelationDesc=heap_open(intoRelationId,AccessExclusiveLock);
763769
}
764770

765771
estate->es_into_relation_descriptor=intoRelationDesc;
@@ -1964,6 +1970,7 @@ EvalPlanQualStart(evalPlanQual *epq, EState *estate, evalPlanQual *priorepq)
19641970
palloc0(estate->es_topPlan->nParamExec*sizeof(ParamExecData));
19651971
epqstate->es_rowMark=estate->es_rowMark;
19661972
epqstate->es_instrument=estate->es_instrument;
1973+
epqstate->es_force_oids=estate->es_force_oids;
19671974
epqstate->es_topPlan=estate->es_topPlan;
19681975
/*
19691976
* Each epqstate must have its own es_evTupleNull state, but

‎src/backend/executor/execUtils.c

Lines changed: 17 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.95 2003/01/12 04:03:34 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.96 2003/01/23 05:10:39 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -199,6 +199,7 @@ CreateExecutorState(void)
199199
estate->es_rowMark=NIL;
200200

201201
estate->es_instrument= false;
202+
estate->es_force_oids= false;
202203

203204
estate->es_exprcontexts=NIL;
204205

@@ -424,7 +425,6 @@ ExecAssignResultTypeFromOuterPlan(PlanState *planstate)
424425
void
425426
ExecAssignResultTypeFromTL(PlanState*planstate)
426427
{
427-
ResultRelInfo*ri;
428428
boolhasoid= false;
429429
TupleDesctupDesc;
430430

@@ -444,14 +444,24 @@ ExecAssignResultTypeFromTL(PlanState *planstate)
444444
* have to make the decision on a per-relation basis as we initialize
445445
* each of the child plans of the topmost Append plan.So, this is
446446
* ugly but it works, for now ...
447+
*
448+
* SELECT INTO is also pretty grotty, because we don't yet have the
449+
* INTO relation's descriptor at this point; we have to look aside
450+
* at a flag set by InitPlan().
447451
*/
448-
ri=planstate->state->es_result_relation_info;
449-
if (ri!=NULL)
452+
if (planstate->state->es_force_oids)
453+
hasoid= true;
454+
else
450455
{
451-
Relationrel=ri->ri_RelationDesc;
456+
ResultRelInfo*ri=planstate->state->es_result_relation_info;
452457

453-
if (rel!=NULL)
454-
hasoid=rel->rd_rel->relhasoids;
458+
if (ri!=NULL)
459+
{
460+
Relationrel=ri->ri_RelationDesc;
461+
462+
if (rel!=NULL)
463+
hasoid=rel->rd_rel->relhasoids;
464+
}
455465
}
456466

457467
/*

‎src/include/nodes/execnodes.h

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $Id: execnodes.h,v 1.91 2003/01/12 04:03:34 tgl Exp $
10+
* $Id: execnodes.h,v 1.92 2003/01/23 05:10:41 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -311,6 +311,8 @@ typedef struct EState
311311
List*es_rowMark;/* not good place, but there is no other */
312312

313313
booles_instrument;/* true requests runtime instrumentation */
314+
booles_force_oids;/* true forces result tuples to have (space
315+
* for) OIDs --- used for SELECT INTO */
314316

315317
List*es_exprcontexts;/* List of ExprContexts within EState */
316318

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