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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/explain_options.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/util/assert_util.h"
namespace mongo {
constexpr StringData ExplainOptions::kVerbosityName;
constexpr StringData ExplainOptions::kQueryPlannerVerbosityStr;
constexpr StringData ExplainOptions::kExecStatsVerbosityStr;
constexpr StringData ExplainOptions::kAllPlansExecutionVerbosityStr;
StringData ExplainOptions::verbosityString(ExplainOptions::Verbosity verbosity) {
switch (verbosity) {
case Verbosity::kQueryPlanner:
return kQueryPlannerVerbosityStr;
case Verbosity::kExecStats:
return kExecStatsVerbosityStr;
case Verbosity::kExecAllPlans:
return kAllPlansExecutionVerbosityStr;
default:
MONGO_UNREACHABLE;
}
}
StatusWith<ExplainOptions::Verbosity> ExplainOptions::parseCmdBSON(const BSONObj& cmdObj) {
if (BSONType::Object != cmdObj.firstElement().type()) {
return Status(ErrorCodes::FailedToParse, "explain command requires a nested object");
}
auto verbosity = Verbosity::kExecAllPlans;
if (auto verbosityElt = cmdObj[kVerbosityName]) {
if (verbosityElt.type() != BSONType::String) {
return Status(ErrorCodes::FailedToParse, "explain verbosity must be a string");
}
auto verbStr = verbosityElt.valueStringData();
if (verbStr == kQueryPlannerVerbosityStr) {
verbosity = Verbosity::kQueryPlanner;
} else if (verbStr == kExecStatsVerbosityStr) {
verbosity = Verbosity::kExecStats;
} else if (verbStr != kAllPlansExecutionVerbosityStr) {
return Status(ErrorCodes::FailedToParse,
str::stream()
<< "verbosity string must be one of {'" << kQueryPlannerVerbosityStr
<< "', '" << kExecStatsVerbosityStr << "', '"
<< kAllPlansExecutionVerbosityStr << "'}");
}
}
return verbosity;
}
BSONObj ExplainOptions::toBSON(ExplainOptions::Verbosity verbosity) {
BSONObjBuilder explainOptionsBuilder;
explainOptionsBuilder.append(kVerbosityName, StringData(verbosityString(verbosity)));
return explainOptionsBuilder.obj();
}
} // namespace mongo
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