C++ (Cpp) pgstat_report_streamstat Examples

Example #1

File: stream.c Project: usmanm/pipelinedb

Datum
pipeline_stream_insert(PG_FUNCTION_ARGS)
{
	TriggerData *trigdata = (TriggerData *) fcinfo->context;
	Trigger *trig = trigdata->tg_trigger;
	HeapTuple tup;
	List *fdw_private;
	int i;
	ResultRelInfo rinfo;

	if (trig->tgnargs < 1)
		elog(ERROR, "pipeline_stream_insert: must be provided a stream name");

	/* make sure it's called as a trigger */
	if (!CALLED_AS_TRIGGER(fcinfo))
		ereport(ERROR,
				(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
				 errmsg("pipeline_stream_insert: must be called as trigger")));

	/* and that it's called on update or insert */
	if (!TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event) && !TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
		ereport(ERROR,
				(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
				 errmsg("pipeline_stream_insert: must be called on insert or update")));

	/* and that it's called for each row */
	if (!TRIGGER_FIRED_FOR_ROW(trigdata->tg_event))
		ereport(ERROR,
				(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
				 errmsg("pipeline_stream_insert: must be called for each row")));

	/* and that it's called after insert or update */
	if (!TRIGGER_FIRED_AFTER(trigdata->tg_event))
		ereport(ERROR,
				(errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
				 errmsg("pipeline_stream_insert: must be called after insert or update")));

	if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
		tup = trigdata->tg_newtuple;
	else
		tup = trigdata->tg_trigtuple;

	fdw_private = list_make1(RelationGetDescr(trigdata->tg_relation));

	MemSet(&rinfo, 0, sizeof(ResultRelInfo));
	rinfo.ri_RangeTableIndex = 1; /* dummy */
	rinfo.ri_TrigDesc = NULL;

	for (i = 0; i < trig->tgnargs; i++)
	{
		RangeVar *stream;
		Relation rel;
		StreamInsertState *sis;

		stream = makeRangeVarFromNameList(textToQualifiedNameList(cstring_to_text(trig->tgargs[i])));
		rel = heap_openrv(stream, AccessShareLock);

		rinfo.ri_RelationDesc = rel;

		BeginStreamModify(NULL, &rinfo, fdw_private, 0, 0);
		sis = (StreamInsertState *) rinfo.ri_FdwState;
		Assert(sis);

		if (sis->queries)
		{
			TupleTableSlot *slot = MakeSingleTupleTableSlot(RelationGetDescr(rel));

			ExecStoreTuple(tup, slot, InvalidBuffer, false);
			ExecStreamInsert(NULL, &rinfo, slot, NULL);
			ExecClearTuple(slot);

			ExecDropSingleTupleTableSlot(slot);
			pgstat_report_streamstat(true);
		}

		EndStreamModify(NULL, &rinfo);
		heap_close(rel, AccessShareLock);
	}

	return PointerGetDatum(tup);
}

Example #2

File: transformReceiver.c Project: HyukjinKwon/pipelinedb

static void
pipeline_stream_insert_batch(TransformState *t)
{
	int i;

	if (t->ntups == 0)
		return;

	Assert(t->tg_rel);

	for (i = 0; i < t->cont_query->tgnargs; i++)
	{
		RangeVar *rv = makeRangeVarFromNameList(stringToQualifiedNameList(t->cont_query->tgargs[i]));
		Relation rel = heap_openrv(rv, AccessShareLock);
		Size size;

		if (t->acks)
		{
			int i;

			for (i = 0; i < t->nacks; i++)
			{
				InsertBatchAck *ack = &t->acks[i];
				InsertBatchIncrementNumWTuples(ack->batch, t->ntups);
			}
		}

		size = SendTuplesToContWorkers(rel, RelationGetDescr(t->tg_rel), t->tups, t->ntups, t->acks, t->nacks);

		heap_close(rel, NoLock);

		if (size)
		{
			pgstat_increment_cq_write(t->ntups, size);
			pgstat_report_streamstat(false);
		}
	}

	if (t->acks)
	{
		pfree(t->acks);
		t->acks = NULL;
		t->nacks = 0;
	}

	if (t->ntups)
	{
		for (i = 0; i < t->ntups; i++)
			heap_freetuple(t->tups[i]);

		pfree(t->tups);
		t->tups = NULL;
		t->ntups = 0;
		t->nmaxtups = 0;
	}
	else
	{
		Assert(t->tups == NULL);
		Assert(t->nmaxtups == 0);
	}
}