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/**
* Copyright (C) 2021-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/db/timeseries/timeseries_collmod.h"
#include "mongo/db/catalog/coll_mod.h"
#include "mongo/db/timeseries/catalog_helper.h"
#include "mongo/db/timeseries/timeseries_index_schema_conversion_functions.h"
#include "mongo/logv2/log.h"
#include "mongo/logv2/redaction.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kStorage
namespace mongo {
namespace timeseries {
std::unique_ptr<CollMod> makeTimeseriesBucketsCollModCommand(OperationContext* opCtx,
const CollMod& origCmd) {
const auto& origNs = origCmd.getNamespace();
auto timeseriesOptions = timeseries::getTimeseriesOptions(opCtx, origNs, true);
// Return early with null if we are not working with a time-series collection.
if (!timeseriesOptions) {
return {};
}
auto index = origCmd.getIndex();
if (index && index->getKeyPattern()) {
auto bucketsIndexSpecWithStatus = timeseries::createBucketsIndexSpecFromTimeseriesIndexSpec(
*timeseriesOptions, *index->getKeyPattern());
uassert(ErrorCodes::IndexNotFound,
str::stream() << bucketsIndexSpecWithStatus.getStatus().toString()
<< " Command request: " << redact(origCmd.toBSON({})),
bucketsIndexSpecWithStatus.isOK());
index->setKeyPattern(std::move(bucketsIndexSpecWithStatus.getValue()));
}
auto ns = origNs.makeTimeseriesBucketsNamespace();
CollModRequest request;
request.setIndex(index);
request.setValidator(origCmd.getValidator());
request.setValidationLevel(origCmd.getValidationLevel());
request.setValidationAction(origCmd.getValidationAction());
request.setViewOn(origCmd.getViewOn());
request.setPipeline(origCmd.getPipeline());
request.setRecordPreImages(origCmd.getRecordPreImages());
request.setChangeStreamPreAndPostImages(origCmd.getChangeStreamPreAndPostImages());
request.setExpireAfterSeconds(origCmd.getExpireAfterSeconds());
request.setTimeseries(origCmd.getTimeseries());
request.setDryRun(origCmd.getDryRun());
auto cmd = std::make_unique<CollMod>(ns);
cmd->setCollModRequest(request);
return cmd;
}
std::unique_ptr<CollMod> makeTimeseriesViewCollModCommand(OperationContext* opCtx,
const CollMod& origCmd) {
const auto& ns = origCmd.getNamespace();
auto timeseriesOptions = timeseries::getTimeseriesOptions(opCtx, ns, true);
// Return early with null if we are not working with a time-series collection.
if (!timeseriesOptions) {
return {};
}
auto& tsMod = origCmd.getTimeseries();
if (tsMod) {
auto res = timeseries::applyTimeseriesOptionsModifications(*timeseriesOptions, *tsMod);
if (res.isOK()) {
auto& [newOptions, changed] = res.getValue();
if (changed) {
auto cmd = std::make_unique<CollMod>(ns);
constexpr bool asArray = false;
std::vector<BSONObj> pipeline = {
timeseries::generateViewPipeline(newOptions, asArray)};
CollModRequest viewRequest;
viewRequest.setPipeline(std::move(pipeline));
cmd->setCollModRequest(viewRequest);
return cmd;
}
}
}
return {};
}
Status processCollModCommandWithTimeSeriesTranslation(OperationContext* opCtx,
const NamespaceString& nss,
const CollMod& cmd,
bool performViewChange,
BSONObjBuilder* result) {
const auto* mainCmd = &cmd;
// If the target namespace refers to a time-series collection, we will redirect the
// collection modification request to the underlying bucket collection.
// Aliasing collMod on a time-series collection in this manner has a few advantages:
// - It supports modifying the expireAfterSeconds setting (which is also a collection
// creation option).
// - It avoids any accidental changes to critical view-specific properties of the
// time-series collection, which are important for maintaining the view-bucket
// relationship.
//
// 'timeseriesBucketsCmd' is null if the request namespace does not refer to a time-series
// collection. Otherwise, transforms the user time-series collMod request to one on the
// underlying bucket collection.
auto timeseriesBucketsCmd = makeTimeseriesBucketsCollModCommand(opCtx, cmd);
if (timeseriesBucketsCmd) {
// We additionally create a special, limited collMod command for the view definition
// itself if the pipeline needs to be updated to reflect changed timeseries options.
// This operation is completed first. In the case that we get a partial update where
// only one of the two collMod operations fully completes (e.g. replication rollback),
// having the view pipeline update without updating the timeseries options on the
// buckets collection will result in sub-optimal performance, but correct behavior.
// If the timeseries options were updated without updating the view pipeline, we could
// end up with incorrect query behavior (namely data missing from some queries).
auto timeseriesViewCmd = makeTimeseriesViewCollModCommand(opCtx, cmd);
if (timeseriesViewCmd && performViewChange) {
auto status = processCollModCommand(opCtx, nss, *timeseriesViewCmd, result);
if (!status.isOK()) {
return status;
}
}
mainCmd = timeseriesBucketsCmd.get();
}
return processCollModCommand(opCtx, mainCmd->getNamespace(), *mainCmd, result);
}
} // namespace timeseries
} // namespace mongo
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