Update upstream source from tag 'upstream/6.0.0'master

Update to upstream version '6.0.0'
with Debian dir 5604a80ec1c96ca76f25f40d78e6ef855abec322

1 files changed, 0 insertions, 279 deletions

diff --git a/src/mongo/db/pipeline/document_source_streaming_group.cpp b/src/mongo/db/pipeline/document_source_streaming_group.cpp
deleted file mode 100644
index 0aeae62201a..00000000000
--- a/src/mongo/db/pipeline/document_source_streaming_group.cpp
+++ /dev/null
@@ -1,279 +0,0 @@
-/**
- *    Copyright (C) 2022-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 <memory>
-
-#include "mongo/db/exec/document_value/document.h"
-#include "mongo/db/exec/document_value/value.h"
-#include "mongo/db/exec/document_value/value_comparator.h"
-#include "mongo/db/pipeline/accumulation_statement.h"
-#include "mongo/db/pipeline/accumulator.h"
-#include "mongo/db/pipeline/document_source_group.h"
-#include "mongo/db/pipeline/document_source_streaming_group.h"
-#include "mongo/db/pipeline/expression.h"
-#include "mongo/db/pipeline/expression_context.h"
-#include "mongo/db/pipeline/lite_parsed_document_source.h"
-#include "mongo/db/stats/resource_consumption_metrics.h"
-#include "mongo/util/destructor_guard.h"
-
-namespace mongo {
-
-/*
- * $_internalStreamingGroup is an internal stage that is only used in certain cases by the
- * pipeline optimizer. For now it should not be used anywhere outside the MongoDB server.
- */
-REGISTER_DOCUMENT_SOURCE(_internalStreamingGroup,
-                         LiteParsedDocumentSourceDefault::parse,
-                         DocumentSourceStreamingGroup::createFromBson,
-                         AllowedWithApiStrict::kAlways);
-
-constexpr StringData DocumentSourceStreamingGroup::kStageName;
-
-const char* DocumentSourceStreamingGroup::getSourceName() const {
-    return kStageName.rawData();
-}
-
-DocumentSource::GetNextResult DocumentSourceStreamingGroup::doGetNext() {
-    auto getReadyResult = getNextReadyGroup();
-    if (!getReadyResult.isEOF()) {
-        return getReadyResult;
-    } else if (_sourceDepleted) {
-        dispose();
-        return getReadyResult;
-    }
-
-    auto prepareResult = readyNextBatch();
-    if (prepareResult.isPaused()) {
-        return prepareResult;
-    }
-    return getNextReadyGroup();
-}
-
-DocumentSourceStreamingGroup::DocumentSourceStreamingGroup(
-    const boost::intrusive_ptr<ExpressionContext>& expCtx,
-    boost::optional<size_t> maxMemoryUsageBytes)
-    : DocumentSourceGroupBase(kStageName, expCtx, maxMemoryUsageBytes), _sourceDepleted(false) {}
-
-boost::intrusive_ptr<DocumentSourceStreamingGroup> DocumentSourceStreamingGroup::create(
-    const boost::intrusive_ptr<ExpressionContext>& expCtx,
-    const boost::intrusive_ptr<Expression>& groupByExpression,
-    std::vector<size_t> monotonicExpressionIndexes,
-    std::vector<AccumulationStatement> accumulationStatements,
-    boost::optional<size_t> maxMemoryUsageBytes) {
-    boost::intrusive_ptr<DocumentSourceStreamingGroup> groupStage =
-        new DocumentSourceStreamingGroup(expCtx, maxMemoryUsageBytes);
-    groupStage->setIdExpression(groupByExpression);
-    for (auto&& statement : accumulationStatements) {
-        groupStage->addAccumulator(statement);
-    }
-    uassert(7026709,
-            "streaming group must have at least one monotonic id expression",
-            !monotonicExpressionIndexes.empty());
-    uassert(7026710,
-            "streaming group monotonic expression indexes must correspond to id expressions",
-            std::all_of(monotonicExpressionIndexes.begin(),
-                        monotonicExpressionIndexes.end(),
-                        [&](size_t i) { return i < groupStage->_idExpressions.size(); }));
-    groupStage->_monotonicExpressionIndexes = std::move(monotonicExpressionIndexes);
-    return groupStage;
-}
-
-boost::intrusive_ptr<DocumentSource> DocumentSourceStreamingGroup::createFromBson(
-    BSONElement elem, const boost::intrusive_ptr<ExpressionContext>& expCtx) {
-    return createFromBsonWithMaxMemoryUsage(std::move(elem), expCtx, boost::none);
-}
-
-boost::intrusive_ptr<DocumentSource> DocumentSourceStreamingGroup::createFromBsonWithMaxMemoryUsage(
-    BSONElement elem,
-    const boost::intrusive_ptr<ExpressionContext>& expCtx,
-    boost::optional<size_t> maxMemoryUsageBytes) {
-    boost::intrusive_ptr<DocumentSourceStreamingGroup> groupStage =
-        new DocumentSourceStreamingGroup(expCtx, maxMemoryUsageBytes);
-    groupStage->initializeFromBson(elem);
-
-    const auto& monotonicIdFieldsElem = elem.Obj().getField(kMonotonicIdFieldsSpecField);
-    uassert(7026702,
-            "streaming group must specify an array of monotonic id fields " +
-                kMonotonicIdFieldsSpecField,
-            monotonicIdFieldsElem.type() == Array);
-    const auto& monotonicIdFields = monotonicIdFieldsElem.Array();
-    if (groupStage->_idFieldNames.empty()) {
-        uassert(7026703,
-                "if there is no explicit id fields, " + kMonotonicIdFieldsSpecField +
-                    " must contain a single \"_id\" string",
-                monotonicIdFields.size() == 1 &&
-                    monotonicIdFields[0].valueStringDataSafe() == "_id"_sd);
-        groupStage->_monotonicExpressionIndexes.push_back(0);
-    } else {
-        groupStage->_monotonicExpressionIndexes.reserve(monotonicIdFields.size());
-        for (const auto& fieldNameElem : monotonicIdFields) {
-            uassert(7026704,
-                    kMonotonicIdFieldsSpecField + " elements must be strings",
-                    fieldNameElem.type() == String);
-            StringData fieldName = fieldNameElem.valueStringData();
-            auto it = std::find(
-                groupStage->_idFieldNames.begin(), groupStage->_idFieldNames.end(), fieldName);
-            uassert(7026705, "id field not found", it != groupStage->_idFieldNames.end());
-            groupStage->_monotonicExpressionIndexes.push_back(
-                std::distance(groupStage->_idFieldNames.begin(), it));
-        }
-        std::sort(groupStage->_monotonicExpressionIndexes.begin(),
-                  groupStage->_monotonicExpressionIndexes.end());
-    }
-
-    return groupStage;
-}
-
-void DocumentSourceStreamingGroup::serializeAdditionalFields(
-    MutableDocument& out, const SerializationOptions& opts) const {
-    std::vector<Value> monotonicIdFields;
-    if (_idFieldNames.empty()) {
-        monotonicIdFields.emplace_back(opts.serializeFieldPath("_id"));
-    } else {
-        for (size_t i : _monotonicExpressionIndexes) {
-            monotonicIdFields.emplace_back(opts.serializeFieldPathFromString(_idFieldNames[i]));
-        }
-    }
-    out[kMonotonicIdFieldsSpecField] = Value(std::move(monotonicIdFields));
-}
-
-bool DocumentSourceStreamingGroup::isSpecFieldReserved(StringData fieldName) {
-    return fieldName == kMonotonicIdFieldsSpecField;
-}
-
-DocumentSource::GetNextResult DocumentSourceStreamingGroup::getNextDocument() {
-    if (_firstDocumentOfNextBatch) {
-        GetNextResult result = std::move(_firstDocumentOfNextBatch.value());
-        _firstDocumentOfNextBatch.reset();
-        return result;
-    }
-    return pSource->getNext();
-}
-
-DocumentSource::GetNextResult DocumentSourceStreamingGroup::readyNextBatch() {
-    resetReadyGroups();
-    GetNextResult input = getNextDocument();
-    return readyNextBatchInner(input);
-}
-
-// This separate NOINLINE function is used here to decrease stack utilization of readyNextBatch()
-// and prevent stack overflows.
-MONGO_COMPILER_NOINLINE DocumentSource::GetNextResult
-DocumentSourceStreamingGroup::readyNextBatchInner(GetNextResult input) {
-    setExecutionStarted();
-    // Calculate groups until we either exaust pSource or encounter change in monotonic id
-    // expression, which means all current groups are finalized.
-    for (; input.isAdvanced(); input = pSource->getNext()) {
-        if (shouldSpillWithAttemptToSaveMemory()) {
-            spill();
-        }
-        auto root = input.releaseDocument();
-        Value id = computeId(root);
-
-        if (isBatchFinished(id)) {
-            _firstDocumentOfNextBatch = std::move(root);
-            readyGroups();
-            return input;
-        }
-
-        processDocument(id, root);
-    }
-
-    switch (input.getStatus()) {
-        case DocumentSource::GetNextResult::ReturnStatus::kAdvanced: {
-            MONGO_UNREACHABLE;  // We consumed all advances above.
-        }
-        case DocumentSource::GetNextResult::ReturnStatus::kPauseExecution: {
-            return input;  // Propagate pause.
-        }
-        case DocumentSource::GetNextResult::ReturnStatus::kEOF: {
-            readyGroups();
-            _sourceDepleted = true;
-            return input;
-        }
-    }
-    MONGO_UNREACHABLE;
-}
-
-bool DocumentSourceStreamingGroup::isBatchFinished(const Value& id) {
-    if (_idExpressions.size() == 1) {
-        tassert(7026706,
-                "if there are no explicit id fields, it is only one monotonic expression with id 0",
-                _monotonicExpressionIndexes.size() == 1 && _monotonicExpressionIndexes[0] == 0);
-        return checkForBatchEndAndUpdateLastIdValues([&](size_t) { return id; });
-    } else {
-        tassert(7026707,
-                "if there are explicit id fields, internal representation of id is an array",
-                id.isArray());
-        const std::vector<Value>& idValues = id.getArray();
-        return checkForBatchEndAndUpdateLastIdValues([&](size_t i) { return idValues[i]; });
-    }
-}
-
-template <typename IdValueGetter>
-bool DocumentSourceStreamingGroup::checkForBatchEndAndUpdateLastIdValues(
-    const IdValueGetter& idValueGetter) {
-    auto assertStreamable = [&](Value value) {
-        // Nullish and array values will mess us up because they sort differently than they group.
-        // A null and a missing value will compare equal in sorting, but could result in different
-        // groups, e.g. {_id: {x: null, y: null}} vs {_id: {}}. An array value will sort by the min
-        // or max element, with no tie breaking, but group by the whole array. This means that two
-        // of the exact same array could appear in the input sequence, but with a different array in
-        // the middle of them, and that would still be considered sorted. That would break our
-        // batching group logic.
-        uassert(7026708,
-                "Monotonic value should not be missing, null or an array",
-                !value.nullish() && !value.isArray());
-        return value;
-    };
-
-    // If _lastMonotonicIdFieldValues is empty, it is the first document, so the only thing we need
-    // to do is initialize it.
-    if (_lastMonotonicIdFieldValues.empty()) {
-        for (size_t i : _monotonicExpressionIndexes) {
-            _lastMonotonicIdFieldValues.push_back(assertStreamable(idValueGetter(i)));
-        }
-        return false;
-    } else {
-        bool batchFinished = false;
-        for (size_t index = 0; index < _monotonicExpressionIndexes.size(); ++index) {
-            Value& oldId = _lastMonotonicIdFieldValues[index];
-            const Value& id = assertStreamable(idValueGetter(_monotonicExpressionIndexes[index]));
-            if (pExpCtx->getValueComparator().compare(oldId, id) != 0) {
-                oldId = id;
-                batchFinished = true;
-            }
-        }
-        return batchFinished;
-    }
-}
-
-}  // namespace mongo