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/**
* 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/db/query/ce/maxdiff_test_utils.h"
#include "mongo/db/query/ce/array_histogram.h"
#include "mongo/db/query/ce/max_diff.h"
namespace mongo::ce {
static std::vector<std::string> convertToJSON(const std::vector<SBEValue>& input) {
std::vector<std::string> result;
for (size_t i = 0; i < input.size(); i++) {
const auto [objTag, objVal] = value::makeNewObject();
value::ValueGuard vg(objTag, objVal);
const auto [tag, val] = input[i].get();
// Copy the value because objVal owns its value, and the ValueGuard releases not only
// objVal, but also its Value (in the case below - copyVal).
const auto [copyTag, copyVal] = value::copyValue(tag, val);
value::getObjectView(objVal)->push_back("a", copyTag, copyVal);
std::ostringstream os;
os << std::make_pair(objTag, objVal);
result.push_back(os.str());
}
return result;
}
size_t getActualCard(OperationContext* opCtx,
const std::vector<SBEValue>& input,
const std::string& query) {
return mongo::optimizer::runPipeline(opCtx, query, convertToJSON(input)).size();
}
std::string makeMatchExpr(const SBEValue& val, EstimationType cmpOp) {
std::stringstream matchExpr;
std::string cmpOpName = estimationTypeName.at(cmpOp);
matchExpr << "[{$match: {a: {$" << cmpOpName << ": " << val.get() << "}}}]";
return matchExpr.str();
}
ScalarHistogram makeHistogram(std::vector<SBEValue>& randData, size_t nBuckets) {
sortValueVector(randData);
const DataDistribution& dataDistrib = getDataDistribution(randData);
return genMaxDiffHistogram(dataDistrib, nBuckets);
}
std::string printValueArray(const std::vector<SBEValue>& values) {
std::stringstream strStream;
for (size_t i = 0; i < values.size(); ++i) {
strStream << " " << values[i].get();
}
return strStream.str();
}
std::string plotArrayEstimator(const ArrayHistogram& estimator, const std::string& header) {
std::ostringstream os;
os << header << "\n";
if (!estimator.getScalar().empty()) {
os << "Scalar histogram:\n" << estimator.getScalar().plot();
}
if (!estimator.getArrayUnique().empty()) {
os << "Array unique histogram:\n" << estimator.getArrayUnique().plot();
}
if (!estimator.getArrayMin().empty()) {
os << "Array min histogram:\n" << estimator.getArrayMin().plot();
}
if (!estimator.getArrayMax().empty()) {
os << "Array max histogram:\n" << estimator.getArrayMax().plot();
}
if (!estimator.getTypeCounts().empty()) {
os << "Per scalar data type value counts: ";
for (auto tagCount : estimator.getTypeCounts()) {
os << tagCount.first << "=" << tagCount.second << " ";
}
}
if (!estimator.getArrayTypeCounts().empty()) {
os << "\nPer array data type value counts: ";
for (auto tagCount : estimator.getArrayTypeCounts()) {
os << tagCount.first << "=" << tagCount.second << " ";
}
}
if (estimator.isArray()) {
os << "\nEmpty array count: " << estimator.getEmptyArrayCount();
}
os << "\n";
return os.str();
}
} // namespace mongo::ce
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