C++ (Cpp) tuplesort_gettupleslot_pos Examples

Example #1

File: nodeShareInputScan.c Project: adam8157/gpdb

/* ------------------------------------------------------------------
 * 	ExecShareInputScan
 * 	Retrieve a tuple from the ShareInputScan
 * ------------------------------------------------------------------
 */
TupleTableSlot *
ExecShareInputScan(ShareInputScanState *node)
{
	EState *estate;
	ScanDirection dir;
	bool forward;
	TupleTableSlot *slot;

	ShareInputScan * sisc = (ShareInputScan *) node->ss.ps.plan;

	ShareType share_type = sisc->share_type;

	/* 
	 * get state info from node
	 */
	estate = node->ss.ps.state;
	dir = estate->es_direction;
	forward = ScanDirectionIsForward(dir);


	/* if first time call, need to initialize the tuplestore state.  */
	if(node->ts_state == NULL)
	{
		elog(DEBUG1, "SISC (shareid=%d, slice=%d): No tuplestore yet, initializing tuplestore",
				sisc->share_id, currentSliceId);
		init_tuplestore_state(node);
	}

	slot = node->ss.ps.ps_ResultTupleSlot;

	while(1)
	{
		bool gotOK = false;

		if(share_type == SHARE_MATERIAL || share_type == SHARE_MATERIAL_XSLICE) 
		{
			ntuplestore_acc_advance((NTupleStoreAccessor *) node->ts_pos, forward ? 1 : -1);
			gotOK = ntuplestore_acc_current_tupleslot((NTupleStoreAccessor *) node->ts_pos, slot);
		}
		else
		{
			gotOK = tuplesort_gettupleslot_pos(node->ts_state->sortstore, (TuplesortPos *)node->ts_pos, forward, slot, CurrentMemoryContext);
		}

		if(!gotOK)
			return NULL;

		SIMPLE_FAULT_INJECTOR(ExecShareInputNext);

		return slot;
	}

	Assert(!"should not be here");
	return NULL;
}

Example #2

File: nodeShareInputScan.c Project: PivotalBigData/incubator-hawq

/* ------------------------------------------------------------------
 * ShareInputNext
 * 	Retrieve a tuple from the ShareInputScan
 * ------------------------------------------------------------------
 */
TupleTableSlot * 
ShareInputNext(ShareInputScanState *node)
{
	EState *estate;
	ScanDirection dir;
	bool forward;
	TupleTableSlot *slot;

	ShareInputScan * sisc = (ShareInputScan *) node->ss.ps.plan;

	ShareType share_type = sisc->share_type;

	/* 
	 * get state info from node
	 */
	estate = node->ss.ps.state;
	dir = estate->es_direction;
	forward = ScanDirectionIsForward(dir);


	/* if first time call, need to initialize the tuplestore state.  */
	if(node->ts_state == NULL)
	{
		elog(DEBUG1, "SISC (shareid=%d, slice=%d): No tuplestore yet, initializing tuplestore",
				sisc->share_id, currentSliceId);
		init_tuplestore_state(node);
	}

	slot = node->ss.ps.ps_ResultTupleSlot;

	while(1)
	{
		bool gotOK = false;

		if(share_type == SHARE_MATERIAL || share_type == SHARE_MATERIAL_XSLICE) 
		{
			ntuplestore_acc_advance((NTupleStoreAccessor *) node->ts_pos, forward ? 1 : -1);
			gotOK = ntuplestore_acc_current_tupleslot((NTupleStoreAccessor *) node->ts_pos, slot);
		}
		else
		{
			if(gp_enable_mk_sort)
			{
				gotOK = tuplesort_gettupleslot_pos_mk(node->ts_state->sortstore_mk, (TuplesortPos_mk *)node->ts_pos, forward, slot);
			}
			else
			{
				gotOK = tuplesort_gettupleslot_pos(node->ts_state->sortstore, (TuplesortPos *)node->ts_pos, forward, slot);
			}
		}

		if(!gotOK)
			return NULL;

		Gpmon_M_Incr_Rows_Out(GpmonPktFromShareInputState(node)); 
		CheckSendPlanStateGpmonPkt(&node->ss.ps);

		return slot;
	}

	Assert(!"should not be here");
	return NULL;
}