Function planQuery

src/ExtMsg.actor.cpp:161–189

}

Reference<Plan> planQuery(Reference<UnboundCollectionContext> cx, bson::BSONObj const& query) {
	auto predicate = queryToPredicate(query, true);
	auto simplifiedPredicate = predicate->simplify();

	Reference<Plan> plan = Reference<Plan>(
	    FilterPlan::construct_filter_plan(cx, Reference<Plan>(new TableScanPlan(cx)), simplifiedPredicate));
	if (verboseConsoleOutput) {
		fprintf(stderr, "parsed predicate: %s\n", predicate->toString().c_str());
		fprintf(stderr, "   simplified to: %s\n\n", simplifiedPredicate->toString().c_str());
	}
	if (verboseLogging) {
		TraceEvent("BD_GetMatchingDocs")
		    .detail("QueryPredicate", predicate->toString())
		    .detail("SimplifiedPredicate", predicate->toString())
		    .detail("Plan", plan->describe().toString());
	}

	if (slowQueryLogging && plan->hasScanOfType(PlanType::TableScan)) {
		std::string collectionName = cx->collectionName();
		if (!startsWith(collectionName.c_str(), "system."))
			TraceEvent("SlowQuery")
			    .detail("Database", cx->databaseName())
			    .detail("Collection", collectionName)
			    .detail("Query", query.toString())
			    .detail("Plan", plan->describe().toString());
	}

	return plan;
}

Reference<Plan> planProjection(Reference<Plan> plan,
                               bson::BSONObj const& selector,