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/**
* Copyright (C) 2016 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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.
*/
#pragma once
#include "mongo/platform/atomic_word.h"
namespace mongo {
// If set to true on mongos, all aggregations delivered to the mongos which require a merging shard
// will select the primary shard as the merger. False by default, which means that the merging shard
// will be selected randomly amongst the shards participating in the query. Pipelines capable of
// merging on mongoS are unaffected by this setting, unless internalQueryProhibitMergingOnMongoS is
// true.
extern AtomicBool internalQueryAlwaysMergeOnPrimaryShard;
// If set to true on mongos, all aggregations which could otherwise merge on the mongos will be
// obliged to merge on a shard instead. Pipelines which are redirected to the shards will obey the
// value of internalQueryAlwaysMergeOnPrimaryShard. False by default, meaning that pipelines capable
// of merging on mongoS will always do so.
extern AtomicBool internalQueryProhibitMergingOnMongoS;
// If set to true on mongos then the cluster query planner will not produce plans with the exchange.
// False by default, so the queries run with exchanges.
extern AtomicBool internalQueryDisableExchange;
} // namespace mongo
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