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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.
*/
#pragma once
#include <map>
#include "mongo/db/query/optimizer/index_bounds.h"
namespace mongo::optimizer {
struct DistributionAndPaths {
DistributionAndPaths(DistributionType type);
DistributionAndPaths(DistributionType type, ABTVector paths);
DistributionType _type;
ABTVector _paths;
};
struct IndexCollationEntry {
IndexCollationEntry(ABT path, CollationOp op);
bool operator==(const IndexCollationEntry& other) const;
ABT _path;
CollationOp _op;
};
using IndexCollationSpec = std::vector<IndexCollationEntry>;
/**
* Defines an available system index.
*/
class IndexDefinition {
public:
// For testing.
IndexDefinition(IndexCollationSpec collationSpec, bool isMultiKey);
IndexDefinition(IndexCollationSpec collationSpec,
bool isMultiKey,
DistributionAndPaths distributionAndPaths,
PartialSchemaRequirements partialReqMap);
IndexDefinition(IndexCollationSpec collationSpec,
int64_t version,
uint32_t orderingBits,
bool isMultiKey,
DistributionAndPaths distributionAndPaths,
PartialSchemaRequirements partialReqMap);
const IndexCollationSpec& getCollationSpec() const;
int64_t getVersion() const;
uint32_t getOrdering() const;
bool isMultiKey() const;
const DistributionAndPaths& getDistributionAndPaths() const;
const PartialSchemaRequirements& getPartialReqMap() const;
PartialSchemaRequirements& getPartialReqMap();
private:
const IndexCollationSpec _collationSpec;
const int64_t _version;
const uint32_t _orderingBits;
const bool _isMultiKey;
const DistributionAndPaths _distributionAndPaths;
// Requirements map for partial filter expression.
PartialSchemaRequirements _partialReqMap;
};
// Used to specify parameters to scan node, such as collection name, or file where collection is
// read from.
class ScanDefinition {
public:
using OptionsMapType = opt::unordered_map<std::string, std::string>;
ScanDefinition();
ScanDefinition(OptionsMapType options,
opt::unordered_map<std::string, IndexDefinition> indexDefs);
ScanDefinition(OptionsMapType options,
opt::unordered_map<std::string, IndexDefinition> indexDefs,
DistributionAndPaths distributionAndPaths,
bool exists = true,
CEType ce = -1.0);
const OptionsMapType& getOptionsMap() const;
const DistributionAndPaths& getDistributionAndPaths() const;
const opt::unordered_map<std::string, IndexDefinition>& getIndexDefs() const;
opt::unordered_map<std::string, IndexDefinition>& getIndexDefs();
const IndexPathSet& getNonMultiKeyPathSet() const;
bool exists() const;
CEType getCE() const;
private:
OptionsMapType _options;
DistributionAndPaths _distributionAndPaths;
/**
* Indexes associated with this collection.
*/
opt::unordered_map<std::string, IndexDefinition> _indexDefs;
/**
* Which index paths are NOT multi-key.
*/
IndexPathSet _nonMultiKeyPathSet;
/**
* True if the collection exists.
*/
bool _exists;
// If positive, estimated number of docs in the collection.
CEType _ce;
};
struct Metadata {
Metadata(opt::unordered_map<std::string, ScanDefinition> scanDefs);
Metadata(opt::unordered_map<std::string, ScanDefinition> scanDefs, size_t numberOfPartitions);
opt::unordered_map<std::string, ScanDefinition> _scanDefs;
// Degree of parallelism.
size_t _numberOfPartitions;
bool isParallelExecution() const;
// TODO: generalize cluster spec.
};
} // namespace mongo::optimizer
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