Function MultiExecProcNode

src/backend/executor/execProcnode.c:717–776

---------------------------------------------------------------- * MultiExecProcNode * * Execute a node that doesn't return individual tuples * (it might return a hashtable, bitmap, etc). Caller should * check it got back the expected kind of Node. * * This has essentially the same responsibilities as ExecProcNode, * but it does not do InstrStartNode/InstrStopNode (mainly because * i

 * ----------------------------------------------------------------
 */
Node *
MultiExecProcNode(PlanState *node)
{
	Node	   *result;

	check_stack_depth();

	CHECK_FOR_INTERRUPTS();

	Assert(NULL != node->plan);

	TRACE_POSTGRESQL_EXECPROCNODE_ENTER(GpIdentity.segindex, currentSliceId, nodeTag(node), node->plan->plan_node_id);
	
	if (!node->fHadSentNodeStart)
	{
		/* GPDB hook for collecting query info */
		if (query_info_collect_hook)
			(*query_info_collect_hook)(METRICS_PLAN_NODE_EXECUTING, node);
		node->fHadSentNodeStart = true;
	}

	if (node->chgParam != NULL) /* something changed */
		ExecReScan(node);		/* let ReScan handle this */

	switch (nodeTag(node))
	{
			/*
			 * Only node types that actually support multiexec will be listed
			 */

		case T_HashState:
			result = MultiExecHash((HashState *) node);
			break;

		case T_BitmapIndexScanState:
			result = MultiExecBitmapIndexScan((BitmapIndexScanState *) node);
			break;

		case T_DynamicBitmapIndexScanState:
			result = MultiExecDynamicBitmapIndexScan((DynamicBitmapIndexScanState *) node);
			break;

		case T_BitmapAndState:
			result = MultiExecBitmapAnd((BitmapAndState *) node);
			break;

		case T_BitmapOrState:
			result = MultiExecBitmapOr((BitmapOrState *) node);
			break;

		default:
			elog(ERROR, "unrecognized node type: %d", (int) nodeTag(node));
			result = NULL;
			break;
	}

	TRACE_POSTGRESQL_EXECPROCNODE_EXIT(GpIdentity.segindex, currentSliceId, nodeTag(node), node->plan->plan_node_id);