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.
This commit is contained in:
Vadim B. Mikheev
parent
1d41e88568
commit
aaef7beb79
src
@ -42,7 +42,7 @@ void FreeTriggerDesc(Relation relation);
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static void DescribeTrigger(TriggerDesc *trigdesc, Trigger *trigger);
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static HeapTuple GetTupleForTrigger(EState *estate, ItemPointer tid,
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bool before);
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TupleTableSlot **newSlot);
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extern GlobalMemory CacheCxt;
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@ -664,9 +664,10 @@ ExecBRDeleteTriggers(EState *estate, ItemPointer tupleid)
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Trigger **trigger = rel->trigdesc->tg_before_row[TRIGGER_EVENT_DELETE];
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HeapTuple trigtuple;
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HeapTuple newtuple = NULL;
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TupleTableSlot *newSlot;
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int i;
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trigtuple = GetTupleForTrigger(estate, tupleid, true);
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trigtuple = GetTupleForTrigger(estate, tupleid, &newSlot);
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if (trigtuple == NULL)
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return false;
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@ -701,7 +702,7 @@ ExecARDeleteTriggers(EState *estate, ItemPointer tupleid)
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HeapTuple trigtuple;
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int i;
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trigtuple = GetTupleForTrigger(estate, tupleid, false);
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trigtuple = GetTupleForTrigger(estate, tupleid, NULL);
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Assert(trigtuple != NULL);
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SaveTriggerData = (TriggerData *) palloc(sizeof(TriggerData));
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@ -732,12 +733,20 @@ ExecBRUpdateTriggers(EState *estate, ItemPointer tupleid, HeapTuple newtuple)
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HeapTuple trigtuple;
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HeapTuple oldtuple;
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HeapTuple intuple = newtuple;
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TupleTableSlot *newSlot;
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int i;
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trigtuple = GetTupleForTrigger(estate, tupleid, true);
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trigtuple = GetTupleForTrigger(estate, tupleid, &newSlot);
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if (trigtuple == NULL)
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return NULL;
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/*
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* In READ COMMITTED isolevel it's possible that newtuple
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* was changed due to concurrent update.
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*/
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if (newSlot != NULL)
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intuple = newtuple = ExecRemoveJunk(estate->es_junkFilter, newSlot);
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SaveTriggerData = (TriggerData *) palloc(sizeof(TriggerData));
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SaveTriggerData->tg_event =
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TRIGGER_EVENT_UPDATE | TRIGGER_EVENT_ROW | TRIGGER_EVENT_BEFORE;
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@ -770,7 +779,7 @@ ExecARUpdateTriggers(EState *estate, ItemPointer tupleid, HeapTuple newtuple)
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HeapTuple trigtuple;
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int i;
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trigtuple = GetTupleForTrigger(estate, tupleid, false);
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trigtuple = GetTupleForTrigger(estate, tupleid, NULL);
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Assert(trigtuple != NULL);
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SaveTriggerData = (TriggerData *) palloc(sizeof(TriggerData));
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@ -794,20 +803,21 @@ ExecARUpdateTriggers(EState *estate, ItemPointer tupleid, HeapTuple newtuple)
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extern TupleTableSlot *EvalPlanQual(EState *estate, Index rti, ItemPointer tid);
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static HeapTuple
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GetTupleForTrigger(EState *estate, ItemPointer tid, bool before)
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GetTupleForTrigger(EState *estate, ItemPointer tid, TupleTableSlot **newSlot)
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{
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Relation relation = estate->es_result_relation_info->ri_RelationDesc;
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HeapTupleData tuple;
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HeapTuple result;
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Buffer buffer;
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if (before)
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if (newSlot != NULL)
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{
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int test;
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/*
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* mark tuple for update
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*/
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*newSlot = NULL;
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tuple.t_self = *tid;
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ltrmark:;
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test = heap_mark4update(relation, &tuple, &buffer);
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@ -826,13 +836,14 @@ ltrmark:;
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elog(ERROR, "Can't serialize access due to concurrent update");
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else if (!(ItemPointerEquals(&(tuple.t_self), tid)))
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{
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TupleTableSlot *slot = EvalPlanQual(estate,
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TupleTableSlot *epqslot = EvalPlanQual(estate,
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estate->es_result_relation_info->ri_RangeTableIndex,
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&(tuple.t_self));
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if (!(TupIsNull(slot)))
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if (!(TupIsNull(epqslot)))
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{
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*tid = tuple.t_self;
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*newSlot = epqslot;
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goto ltrmark;
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}
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}
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@ -26,7 +26,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.67 1999/01/29 10:15:09 vadim Exp $
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* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.68 1999/01/29 11:56:00 vadim Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -66,7 +66,7 @@ static void EndPlan(Plan *plan, EState *estate);
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static TupleTableSlot *ExecutePlan(EState *estate, Plan *plan,
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CmdType operation, int numberTuples, ScanDirection direction,
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DestReceiver *destfunc);
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static void ExecRetrieve(TupleTableSlot *slot,
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static void ExecRetrieve(TupleTableSlot *slot,
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DestReceiver *destfunc,
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EState *estate);
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static void ExecAppend(TupleTableSlot *slot, ItemPointer tupleid,
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@ -170,11 +170,11 @@ ExecutorStart(QueryDesc *queryDesc, EState *estate)
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TupleTableSlot *
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ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
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{
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CmdType operation;
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Plan *plan;
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CmdType operation;
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Plan *plan;
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TupleTableSlot *result;
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CommandDest dest;
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void (*destination) ();
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CommandDest dest;
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DestReceiver *destfunc;
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/******************
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* sanity checks
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@ -190,10 +190,19 @@ ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
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operation = queryDesc->operation;
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plan = queryDesc->plantree;
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dest = queryDesc->dest;
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destination = (void (*) ()) DestToFunction(dest);
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destfunc = DestToFunction(dest);
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estate->es_processed = 0;
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estate->es_lastoid = InvalidOid;
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/******************
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* FIXME: the dest setup function ought to be handed the tuple desc
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* for the tuples to be output, but I'm not quite sure how to get that
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* info at this point. For now, passing NULL is OK because no existing
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* dest setup function actually uses the pointer.
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******************
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*/
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(*destfunc->setup) (destfunc, (TupleDesc) NULL);
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switch (feature)
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{
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@ -203,7 +212,7 @@ ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
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operation,
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ALL_TUPLES,
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ForwardScanDirection,
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destination);
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destfunc);
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break;
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case EXEC_FOR:
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result = ExecutePlan(estate,
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@ -211,7 +220,7 @@ ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
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operation,
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count,
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ForwardScanDirection,
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destination);
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destfunc);
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break;
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/******************
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@ -224,7 +233,7 @@ ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
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operation,
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count,
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BackwardScanDirection,
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destination);
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destfunc);
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break;
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/******************
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@ -238,7 +247,7 @@ ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
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operation,
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ONE_TUPLE,
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ForwardScanDirection,
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destination);
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destfunc);
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break;
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default:
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result = NULL;
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@ -246,6 +255,8 @@ ExecutorRun(QueryDesc *queryDesc, EState *estate, int feature, int count)
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break;
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}
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(*destfunc->cleanup) (destfunc);
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return result;
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}
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@ -756,7 +767,7 @@ ExecutePlan(EState *estate,
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CmdType operation,
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int numberTuples,
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ScanDirection direction,
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DestReceiver *destfunc)
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DestReceiver* destfunc)
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{
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JunkFilter *junkfilter;
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@ -941,7 +952,7 @@ lmark:;
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{
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case CMD_SELECT:
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ExecRetrieve(slot, /* slot containing tuple */
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destfunc, /* print function */
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destfunc, /* destination's tuple-receiver obj */
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estate); /* */
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result = slot;
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break;
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@ -1024,7 +1035,7 @@ ExecRetrieve(TupleTableSlot *slot,
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* send the tuple to the front end (or the screen)
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******************
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*/
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(*printfunc) (tuple, attrtype);
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(*destfunc->receiveTuple) (tuple, attrtype, destfunc);
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IncrRetrieved();
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(estate->es_processed)++;
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}
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@ -65,7 +65,7 @@
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* procedural language
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/Attic/gram.c,v 1.3 1999/01/28 11:50:41 wieck Exp $
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* $Header: /cvsroot/pgsql/src/pl/plpgsql/src/Attic/gram.c,v 1.4 1999/01/29 11:56:01 vadim Exp $
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*
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* This software is copyrighted by Jan Wieck - Hamburg.
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*
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@ -414,7 +414,7 @@ static const short yycheck[] = { 21,
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152, 62
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};
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/* -*-C-*- Note some compilers choke on comments on `#line' lines. */
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#line 3 "/usr/share/bison.simple"
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#line 3 "/usr/share/misc/bison.simple"
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/* Skeleton output parser for bison,
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Copyright (C) 1984, 1989, 1990 Free Software Foundation, Inc.
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@ -467,16 +467,6 @@ void *alloca ();
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#endif /* not GNU C. */
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#endif /* alloca not defined. */
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#ifdef __cplusplus
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extern "C" {
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void yyerror(char *);
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int yylex();
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};
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#else
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extern void yyerror(char *);
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extern int yylex();
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#endif
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/* This is the parser code that is written into each bison parser
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when the %semantic_parser declaration is not specified in the grammar.
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It was written by Richard Stallman by simplifying the hairy parser
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@ -573,13 +563,9 @@ int yydebug; /* nonzero means print parse trace */
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#define YYMAXDEPTH 10000
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#endif
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#ifndef YYPARSE_RETURN_TYPE
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#define YYPARSE_RETURN_TYPE int
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#endif
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/* Prevent warning if -Wstrict-prototypes. */
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#ifdef __GNUC__
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YYPARSE_RETURN_TYPE yyparse (void);
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int yyparse (void);
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#endif
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#if __GNUC__ > 1 /* GNU C and GNU C++ define this. */
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@ -621,7 +607,7 @@ __yy_memcpy (char *to, char *from, int count)
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#endif
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#endif
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#line 196 "/usr/share/bison.simple"
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#line 196 "/usr/share/misc/bison.simple"
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/* The user can define YYPARSE_PARAM as the name of an argument to be passed
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into yyparse. The argument should have type void *.
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@ -642,7 +628,7 @@ __yy_memcpy (char *to, char *from, int count)
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#define YYPARSE_PARAM_DECL
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#endif /* not YYPARSE_PARAM */
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YYPARSE_RETURN_TYPE
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int
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yyparse(YYPARSE_PARAM_ARG)
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YYPARSE_PARAM_DECL
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{
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@ -1905,7 +1891,7 @@ case 105:
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break;}
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}
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/* the action file gets copied in in place of this dollarsign */
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#line 498 "/usr/share/bison.simple"
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#line 498 "/usr/share/misc/bison.simple"
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yyvsp -= yylen;
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yyssp -= yylen;
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