Method planSet

src/jrd/RecordSourceNodes.cpp:3421–3634

Go through the streams in the plan, find the corresponding streams in the RseNode and store the plan for that stream. Do it once and only once to make sure there is a one-to-one correspondence between streams in the query and streams in the plan.

// plan for that stream. Do it once and only once to make sure there is a one-to-one correspondence
// between streams in the query and streams in the plan.
void RseNode::planSet(CompilerScratch* csb, PlanNode* plan)
{
	if (plan->type == PlanNode::TYPE_JOIN)
	{
		for (auto planNode : plan->subNodes)
			planSet(csb, planNode);
	}

	if (plan->type != PlanNode::TYPE_RETRIEVE)
		return;

	// Find the tail for the relation/procedure specified in the plan

	const auto stream = plan->recordSourceNode->getStream();
	auto tail = &csb->csb_rpt[stream];

	string planAlias;

	jrd_rel* planRelation = nullptr;
	if (const auto relationNode = nodeAs<RelationSourceNode>(plan->recordSourceNode))
	{
		planRelation = relationNode->relation;
		planAlias = relationNode->alias;
	}

	jrd_prc* planProcedure = nullptr;
	if (const auto procedureNode = nodeAs<ProcedureSourceNode>(plan->recordSourceNode))
	{
		planProcedure = procedureNode->procedure;
		planAlias = procedureNode->alias;
	}

	fb_assert(planRelation || planProcedure);

	const auto name = planRelation ? planRelation->rel_name :
		planProcedure ? planProcedure->getName().toString() : "";

	// If the plan references a view, find the real base relation
	// we are interested in by searching the view map
	StreamType* map = nullptr;
	jrd_rel* viewRelation = nullptr;
	jrd_prc* viewProcedure = nullptr;

	if (tail->csb_map)
	{
		auto tailName = tail->csb_relation ? tail->csb_relation->rel_name :
			tail->csb_procedure ? tail->csb_procedure->getName().toString() : "";

		// If the user has specified an alias, skip past it to find the alias
		// for the base table (if multiple aliases are specified)

		auto tailAlias = tail->csb_alias ? *tail->csb_alias : "";

		if (planAlias.hasData())
		{
			const auto spacePos = planAlias.find_first_of(' ');
			const auto subAlias = planAlias.substr(0, spacePos);