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/**
* Copyright (C) 2015 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/query/internal_plans.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/client.h"
#include "mongo/db/exec/collection_scan.h"
#include "mongo/db/exec/eof.h"
#include "mongo/db/exec/fetch.h"
#include "mongo/db/exec/index_scan.h"
#include "mongo/db/query/plan_executor.h"
#include "mongo/stdx/memory.h"
namespace mongo {
// static
std::unique_ptr<PlanExecutor> InternalPlanner::collectionScan(OperationContext* txn,
StringData ns,
Collection* collection,
const Direction direction,
const RecordId startLoc) {
std::unique_ptr<WorkingSet> ws = stdx::make_unique<WorkingSet>();
if (NULL == collection) {
std::unique_ptr<EOFStage> eof = stdx::make_unique<EOFStage>();
// Takes ownership of 'ws' and 'eof'.
auto statusWithPlanExecutor = PlanExecutor::make(
txn, std::move(ws), std::move(eof), ns.toString(), PlanExecutor::YIELD_MANUAL);
invariant(statusWithPlanExecutor.isOK());
return std::move(statusWithPlanExecutor.getValue());
}
invariant(ns == collection->ns().ns());
CollectionScanParams params;
params.collection = collection;
params.start = startLoc;
if (FORWARD == direction) {
params.direction = CollectionScanParams::FORWARD;
} else {
params.direction = CollectionScanParams::BACKWARD;
}
std::unique_ptr<CollectionScan> cs =
stdx::make_unique<CollectionScan>(txn, params, ws.get(), nullptr);
// Takes ownership of 'ws' and 'cs'.
auto statusWithPlanExecutor = PlanExecutor::make(
txn, std::move(ws), std::move(cs), collection, PlanExecutor::YIELD_MANUAL);
invariant(statusWithPlanExecutor.isOK());
return std::move(statusWithPlanExecutor.getValue());
}
// static
std::unique_ptr<PlanExecutor> InternalPlanner::indexScan(OperationContext* txn,
const Collection* collection,
const IndexDescriptor* descriptor,
const BSONObj& startKey,
const BSONObj& endKey,
bool endKeyInclusive,
Direction direction,
int options) {
invariant(collection);
invariant(descriptor);
IndexScanParams params;
params.descriptor = descriptor;
params.direction = direction;
params.bounds.isSimpleRange = true;
params.bounds.startKey = startKey;
params.bounds.endKey = endKey;
params.bounds.endKeyInclusive = endKeyInclusive;
std::unique_ptr<WorkingSet> ws = stdx::make_unique<WorkingSet>();
std::unique_ptr<PlanStage> root = stdx::make_unique<IndexScan>(txn, params, ws.get(), nullptr);
if (IXSCAN_FETCH & options) {
root = stdx::make_unique<FetchStage>(txn, ws.get(), root.release(), nullptr, collection);
}
// Takes ownership of 'ws' and 'root'.
auto statusWithPlanExecutor = PlanExecutor::make(
txn, std::move(ws), std::move(root), collection, PlanExecutor::YIELD_MANUAL);
invariant(statusWithPlanExecutor.isOK());
return std::move(statusWithPlanExecutor.getValue());
}
} // namespace mongo
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