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Commitaaef7be

Browse files
committed
Hope that execMain.c good merged.
Fix for BEFORE ROW UPDATE triggers: result tuple may be different(due to concurrent update) from one initially produced by top level plan.
1 parent1d41e88 commitaaef7be

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3 files changed

+51
-43
lines changed

3 files changed

+51
-43
lines changed

‎src/backend/commands/trigger.c‎

Lines changed: 20 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -42,7 +42,7 @@ voidFreeTriggerDesc(Relation relation);
4242

4343
staticvoidDescribeTrigger(TriggerDesc*trigdesc,Trigger*trigger);
4444
staticHeapTupleGetTupleForTrigger(EState*estate,ItemPointertid,
45-
boolbefore);
45+
TupleTableSlot**newSlot);
4646

4747
externGlobalMemoryCacheCxt;
4848

@@ -664,9 +664,10 @@ ExecBRDeleteTriggers(EState *estate, ItemPointer tupleid)
664664
Trigger**trigger=rel->trigdesc->tg_before_row[TRIGGER_EVENT_DELETE];
665665
HeapTupletrigtuple;
666666
HeapTuplenewtuple=NULL;
667+
TupleTableSlot*newSlot;
667668
inti;
668669

669-
trigtuple=GetTupleForTrigger(estate,tupleid,true);
670+
trigtuple=GetTupleForTrigger(estate,tupleid,&newSlot);
670671
if (trigtuple==NULL)
671672
return false;
672673

@@ -701,7 +702,7 @@ ExecARDeleteTriggers(EState *estate, ItemPointer tupleid)
701702
HeapTupletrigtuple;
702703
inti;
703704

704-
trigtuple=GetTupleForTrigger(estate,tupleid,false);
705+
trigtuple=GetTupleForTrigger(estate,tupleid,NULL);
705706
Assert(trigtuple!=NULL);
706707

707708
SaveTriggerData= (TriggerData*)palloc(sizeof(TriggerData));
@@ -732,12 +733,20 @@ ExecBRUpdateTriggers(EState *estate, ItemPointer tupleid, HeapTuple newtuple)
732733
HeapTupletrigtuple;
733734
HeapTupleoldtuple;
734735
HeapTupleintuple=newtuple;
736+
TupleTableSlot*newSlot;
735737
inti;
736738

737-
trigtuple=GetTupleForTrigger(estate,tupleid,true);
739+
trigtuple=GetTupleForTrigger(estate,tupleid,&newSlot);
738740
if (trigtuple==NULL)
739741
returnNULL;
740742

743+
/*
744+
* In READ COMMITTED isolevel it's possible that newtuple
745+
* was changed due to concurrent update.
746+
*/
747+
if (newSlot!=NULL)
748+
intuple=newtuple=ExecRemoveJunk(estate->es_junkFilter,newSlot);
749+
741750
SaveTriggerData= (TriggerData*)palloc(sizeof(TriggerData));
742751
SaveTriggerData->tg_event=
743752
TRIGGER_EVENT_UPDATE |TRIGGER_EVENT_ROW |TRIGGER_EVENT_BEFORE;
@@ -770,7 +779,7 @@ ExecARUpdateTriggers(EState *estate, ItemPointer tupleid, HeapTuple newtuple)
770779
HeapTupletrigtuple;
771780
inti;
772781

773-
trigtuple=GetTupleForTrigger(estate,tupleid,false);
782+
trigtuple=GetTupleForTrigger(estate,tupleid,NULL);
774783
Assert(trigtuple!=NULL);
775784

776785
SaveTriggerData= (TriggerData*)palloc(sizeof(TriggerData));
@@ -794,20 +803,21 @@ ExecARUpdateTriggers(EState *estate, ItemPointer tupleid, HeapTuple newtuple)
794803
externTupleTableSlot*EvalPlanQual(EState*estate,Indexrti,ItemPointertid);
795804

796805
staticHeapTuple
797-
GetTupleForTrigger(EState*estate,ItemPointertid,boolbefore)
806+
GetTupleForTrigger(EState*estate,ItemPointertid,TupleTableSlot**newSlot)
798807
{
799808
Relationrelation=estate->es_result_relation_info->ri_RelationDesc;
800809
HeapTupleDatatuple;
801810
HeapTupleresult;
802811
Bufferbuffer;
803812

804-
if (before)
813+
if (newSlot!=NULL)
805814
{
806815
inttest;
807816

808817
/*
809818
*mark tuple for update
810819
*/
820+
*newSlot=NULL;
811821
tuple.t_self=*tid;
812822
ltrmark:;
813823
test=heap_mark4update(relation,&tuple,&buffer);
@@ -826,13 +836,14 @@ ltrmark:;
826836
elog(ERROR,"Can't serialize access due to concurrent update");
827837
elseif (!(ItemPointerEquals(&(tuple.t_self),tid)))
828838
{
829-
TupleTableSlot*slot=EvalPlanQual(estate,
839+
TupleTableSlot*epqslot=EvalPlanQual(estate,
830840
estate->es_result_relation_info->ri_RangeTableIndex,
831841
&(tuple.t_self));
832842

833-
if (!(TupIsNull(slot)))
843+
if (!(TupIsNull(epqslot)))
834844
{
835845
*tid=tuple.t_self;
846+
*newSlot=epqslot;
836847
gotoltrmark;
837848
}
838849
}

‎src/backend/executor/execMain.c‎

Lines changed: 25 additions & 14 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 1.67 1999/01/2910:15:09 vadim Exp $
29+
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.68 1999/01/2911:56:00 vadim Exp $
3030
*
3131
*-------------------------------------------------------------------------
3232
*/
@@ -66,7 +66,7 @@ static void EndPlan(Plan *plan, EState *estate);
6666
staticTupleTableSlot*ExecutePlan(EState*estate,Plan*plan,
6767
CmdTypeoperation,intnumberTuples,ScanDirectiondirection,
6868
DestReceiver*destfunc);
69-
staticvoidExecRetrieve(TupleTableSlot*slot,
69+
staticvoidExecRetrieve(TupleTableSlot*slot,
7070
DestReceiver*destfunc,
7171
EState*estate);
7272
staticvoidExecAppend(TupleTableSlot*slot,ItemPointertupleid,
@@ -170,11 +170,11 @@ ExecutorStart(QueryDesc *queryDesc, EState *estate)
170170
TupleTableSlot*
171171
ExecutorRun(QueryDesc*queryDesc,EState*estate,intfeature,intcount)
172172
{
173-
CmdTypeoperation;
174-
Plan*plan;
173+
CmdTypeoperation;
174+
Plan*plan;
175175
TupleTableSlot*result;
176-
CommandDestdest;
177-
void(*destination) ();
176+
CommandDestdest;
177+
DestReceiver*destfunc;
178178

179179
/******************
180180
*sanity checks
@@ -190,10 +190,19 @@ ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
190190
operation=queryDesc->operation;
191191
plan=queryDesc->plantree;
192192
dest=queryDesc->dest;
193-
destination= (void (*) ())DestToFunction(dest);
193+
destfunc=DestToFunction(dest);
194194
estate->es_processed=0;
195195
estate->es_lastoid=InvalidOid;
196196

197+
/******************
198+
*FIXME: the dest setup function ought to be handed the tuple desc
199+
* for the tuples to be output, but I'm not quite sure how to get that
200+
* info at this point. For now, passing NULL is OK because no existing
201+
* dest setup function actually uses the pointer.
202+
******************
203+
*/
204+
(*destfunc->setup) (destfunc, (TupleDesc)NULL);
205+
197206
switch (feature)
198207
{
199208

@@ -203,15 +212,15 @@ ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
203212
operation,
204213
ALL_TUPLES,
205214
ForwardScanDirection,
206-
destination);
215+
destfunc);
207216
break;
208217
caseEXEC_FOR:
209218
result=ExecutePlan(estate,
210219
plan,
211220
operation,
212221
count,
213222
ForwardScanDirection,
214-
destination);
223+
destfunc);
215224
break;
216225

217226
/******************
@@ -224,7 +233,7 @@ ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
224233
operation,
225234
count,
226235
BackwardScanDirection,
227-
destination);
236+
destfunc);
228237
break;
229238

230239
/******************
@@ -238,14 +247,16 @@ ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
238247
operation,
239248
ONE_TUPLE,
240249
ForwardScanDirection,
241-
destination);
250+
destfunc);
242251
break;
243252
default:
244253
result=NULL;
245254
elog(DEBUG,"ExecutorRun: Unknown feature %d",feature);
246255
break;
247256
}
248257

258+
(*destfunc->cleanup) (destfunc);
259+
249260
returnresult;
250261
}
251262

@@ -756,7 +767,7 @@ ExecutePlan(EState *estate,
756767
CmdTypeoperation,
757768
intnumberTuples,
758769
ScanDirectiondirection,
759-
DestReceiver*destfunc)
770+
DestReceiver*destfunc)
760771
{
761772
JunkFilter*junkfilter;
762773

@@ -941,7 +952,7 @@ lmark:;
941952
{
942953
caseCMD_SELECT:
943954
ExecRetrieve(slot,/* slot containing tuple */
944-
destfunc,/*print function */
955+
destfunc,/*destination's tuple-receiver obj */
945956
estate);/* */
946957
result=slot;
947958
break;
@@ -1024,7 +1035,7 @@ ExecRetrieve(TupleTableSlot *slot,
10241035
*send the tuple to the front end (or the screen)
10251036
******************
10261037
*/
1027-
(*printfunc) (tuple,attrtype);
1038+
(*destfunc->receiveTuple) (tuple,attrtype,destfunc);
10281039
IncrRetrieved();
10291040
(estate->es_processed)++;
10301041
}

‎src/pl/plpgsql/src/gram.c‎

Lines changed: 6 additions & 20 deletions
Original file line numberDiff line numberDiff line change
@@ -65,7 +65,7 @@
6565
* procedural language
6666
*
6767
* IDENTIFICATION
68-
* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/Attic/gram.c,v 1.3 1999/01/28 11:50:41 wieck Exp $
68+
* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/Attic/gram.c,v 1.4 1999/01/29 11:56:01 vadim Exp $
6969
*
7070
* This software is copyrighted by Jan Wieck - Hamburg.
7171
*
@@ -414,7 +414,7 @@ static const short yycheck[] = { 21,
414414
152,62
415415
};
416416
/* -*-C-*- Note some compilers choke on comments on `#line' lines. */
417-
#line 3 "/usr/share/bison.simple"
417+
#line 3 "/usr/share/misc/bison.simple"
418418

419419
/* Skeleton output parser for bison,
420420
Copyright (C) 1984, 1989, 1990 Free Software Foundation, Inc.
@@ -467,16 +467,6 @@ void *alloca ();
467467
#endif/* not GNU C. */
468468
#endif/* alloca not defined. */
469469

470-
#ifdef__cplusplus
471-
extern"C" {
472-
voidyyerror(char*);
473-
intyylex();
474-
};
475-
#else
476-
externvoidyyerror(char*);
477-
externintyylex();
478-
#endif
479-
480470
/* This is the parser code that is written into each bison parser
481471
when the %semantic_parser declaration is not specified in the grammar.
482472
It was written by Richard Stallman by simplifying the hairy parser
@@ -573,13 +563,9 @@ int yydebug;/* nonzero means print parse trace*/
573563
#defineYYMAXDEPTH 10000
574564
#endif
575565

576-
#ifndefYYPARSE_RETURN_TYPE
577-
#defineYYPARSE_RETURN_TYPE int
578-
#endif
579-
580566
/* Prevent warning if -Wstrict-prototypes. */
581567
#ifdef__GNUC__
582-
YYPARSE_RETURN_TYPEyyparse (void);
568+
intyyparse (void);
583569
#endif
584570

585571
#if__GNUC__>1/* GNU C and GNU C++ define this. */
@@ -621,7 +607,7 @@ __yy_memcpy (char *to, char *from, int count)
621607
#endif
622608
#endif
623609

624-
#line 196 "/usr/share/bison.simple"
610+
#line 196 "/usr/share/misc/bison.simple"
625611

626612
/* The user can define YYPARSE_PARAM as the name of an argument to be passed
627613
into yyparse. The argument should have type void *.
@@ -642,7 +628,7 @@ __yy_memcpy (char *to, char *from, int count)
642628
#defineYYPARSE_PARAM_DECL
643629
#endif/* not YYPARSE_PARAM */
644630

645-
YYPARSE_RETURN_TYPE
631+
int
646632
yyparse(YYPARSE_PARAM_ARG)
647633
YYPARSE_PARAM_DECL
648634
{
@@ -1905,7 +1891,7 @@ case 105:
19051891
break;}
19061892
}
19071893
/* the action file gets copied in in place of this dollarsign */
1908-
#line 498 "/usr/share/bison.simple"
1894+
#line 498 "/usr/share/misc/bison.simple"
19091895

19101896
yyvsp-=yylen;
19111897
yyssp-=yylen;

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