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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/pipeline/lite_parsed_pipeline.h"
#include "mongo/db/operation_context.h"
namespace mongo {
void LiteParsedPipeline::assertSupportsReadConcern(
OperationContext* opCtx,
boost::optional<ExplainOptions::Verbosity> explain,
bool enableMajorityReadConcern) const try {
auto readConcern = repl::ReadConcernArgs::get(opCtx);
// Reject non change stream aggregation queries that try to use "majority" read concern when
// enableMajorityReadConcern=false.
if (!hasChangeStream() && !enableMajorityReadConcern &&
(repl::ReadConcernArgs::get(opCtx).getLevel() ==
repl::ReadConcernLevel::kMajorityReadConcern)) {
uasserted(ErrorCodes::ReadConcernMajorityNotEnabled,
"Only change stream aggregation queries support 'majority' read concern when "
"enableMajorityReadConcern=false");
}
uassert(ErrorCodes::InvalidOptions,
str::stream() << "Explain for the aggregate command cannot run with a readConcern "
<< "other than 'local', or in a multi-document transaction. Current "
<< "readConcern: " << readConcern.toString(),
!explain || readConcern.getLevel() == repl::ReadConcernLevel::kLocalReadConcern);
for (auto&& spec : _stageSpecs) {
spec->assertSupportsReadConcern(readConcern);
}
} catch (const DBException& ex) {
using namespace std::string_literals;
// If we are in a multi-document transaction, we intercept the 'readConcern'
// assertion in order to provide a more descriptive error message and code.
uassert(ErrorCodes::OperationNotSupportedInTransaction,
"Operation not permitted in transaction"s
" :: caused by :: "s +
ex.reason(),
// This will be true for retryable writes in addition to the intended case of an in-
// process transaction. However the retryable write code path should not call this
// function.
!opCtx->getTxnNumber());
throw;
}
bool LiteParsedPipeline::verifyIsSupported(
OperationContext* opCtx,
const std::function<bool(OperationContext*, const NamespaceString&)> isSharded,
const boost::optional<ExplainOptions::Verbosity> explain,
bool enableMajorityReadConcern) const {
// Verify litePipe can be run at the given read concern.
assertSupportsReadConcern(opCtx, explain, enableMajorityReadConcern);
// Verify that no involved namespace is sharded unless allowed by the pipeline.
auto sharded = false;
for (const auto& nss : getInvolvedNamespaces()) {
sharded = isSharded(opCtx, nss);
uassert(28769,
str::stream() << nss.ns() << " cannot be sharded",
allowShardedForeignCollection(nss) || !sharded);
}
return sharded;
}
} // namespace mongo
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