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/**
* Copyright (C) 2013 10gen 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 <string>
#include "mongo/db/clientcursor.h"
#include "mongo/db/curop.h"
#include "mongo/db/dbmessage.h"
#include "mongo/db/query/canonical_query.h"
#include "mongo/util/net/message.h"
namespace mongo {
class OperationContext;
/**
* Constructs a PlanExecutor for a query with the oplogReplay option set to true,
* for the query 'cq' over the collection 'collection'. The PlanExecutor will
* wrap a singleton OplogStart stage.
*
* The oplog start finding hack requires that 'cq' has a $gt or $gte predicate over
* a field named 'ts'.
*
* On success, caller takes ownership of *execOut.
*/
Status getOplogStartHack(OperationContext* txn,
Collection* collection,
CanonicalQuery* cq,
PlanExecutor** execOut);
/**
* Called from the getMore entry point in ops/query.cpp.
*/
QueryResult::View getMore(OperationContext* txn,
const char* ns,
int ntoreturn,
long long cursorid,
CurOp& curop,
int pass,
bool& exhaust,
bool* isCursorAuthorized);
/**
* Run the query 'q' and place the result in 'result'.
*/
std::string runQuery(OperationContext* txn,
Message& m,
QueryMessage& q,
const NamespaceString& ns,
CurOp& curop,
Message &result);
} // namespace mongo
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