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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/query/find.h"
#include <memory>
#include "mongo/base/error_codes.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/client.h"
#include "mongo/db/clientcursor.h"
#include "mongo/db/commands.h"
#include "mongo/db/curop.h"
#include "mongo/db/curop_failpoint_helpers.h"
#include "mongo/db/cursor_manager.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/exec/filter.h"
#include "mongo/db/exec/working_set_common.h"
#include "mongo/db/keypattern.h"
#include "mongo/db/matcher/extensions_callback_real.h"
#include "mongo/db/query/collection_query_info.h"
#include "mongo/db/query/explain.h"
#include "mongo/db/query/find_common.h"
#include "mongo/db/query/get_executor.h"
#include "mongo/db/query/internal_plans.h"
#include "mongo/db/query/plan_summary_stats.h"
#include "mongo/db/query/query_planner_params.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/db/s/collection_sharding_state.h"
#include "mongo/db/server_options.h"
#include "mongo/db/service_context.h"
#include "mongo/db/stats/resource_consumption_metrics.h"
#include "mongo/db/stats/top.h"
#include "mongo/db/storage/storage_options.h"
#include "mongo/logv2/log.h"
#include "mongo/s/stale_exception.h"
#include "mongo/util/fail_point.h"
#include "mongo/util/scopeguard.h"
#include "mongo/util/str.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kQuery
namespace mongo {
using std::unique_ptr;
// Failpoint for checking whether we've received a getmore.
MONGO_FAIL_POINT_DEFINE(failReceivedGetmore);
bool shouldSaveCursor(OperationContext* opCtx,
const CollectionPtr& collection,
PlanExecutor::ExecState finalState,
PlanExecutor* exec) {
const FindCommandRequest& findCommand = exec->getCanonicalQuery()->getFindCommandRequest();
if (findCommand.getSingleBatch()) {
return false;
}
// We keep a tailable cursor around unless the collection we're tailing has no
// records.
//
// SERVER-13955: we should be able to create a tailable cursor that waits on
// an empty collection. Right now we do not keep a cursor if the collection
// has zero records.
if (findCommand.getTailable()) {
return collection && collection->numRecords(opCtx) != 0U;
}
return !exec->isEOF();
}
bool shouldSaveCursorGetMore(PlanExecutor* exec, bool isTailable) {
return isTailable || !exec->isEOF();
}
void endQueryOp(OperationContext* opCtx,
const CollectionPtr& collection,
const PlanExecutor& exec,
long long numResults,
boost::optional<ClientCursorPin&> cursor,
const BSONObj& cmdObj) {
auto curOp = CurOp::get(opCtx);
// Fill out basic CurOp query exec properties. More metrics (nreturned and executionTime)
// are collected within collectTelemetryMongod.
curOp->debug().cursorid = (cursor.has_value() ? cursor->getCursor()->cursorid() : -1);
curOp->debug().cursorExhausted = !cursor.has_value();
curOp->debug().additiveMetrics.nBatches = 1;
// Fill out CurOp based on explain summary statistics.
PlanSummaryStats summaryStats;
auto&& explainer = exec.getPlanExplainer();
explainer.getSummaryStats(&summaryStats);
curOp->debug().setPlanSummaryMetrics(summaryStats);
curOp->setEndOfOpMetrics(numResults);
if (cursor) {
collectTelemetryMongod(opCtx, *cursor);
} else {
collectTelemetryMongod(opCtx, std::move(curOp->debug().telemetryRequestShapifier));
}
if (collection) {
CollectionQueryInfo::get(collection).notifyOfQuery(opCtx, collection, summaryStats);
}
if (curOp->shouldDBProfile()) {
auto&& [stats, _] = explainer.getWinningPlanStats(ExplainOptions::Verbosity::kExecStats);
curOp->debug().execStats = std::move(stats);
}
}
} // namespace mongo
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