beedb/include/plan/optimizer/rule/index_scan_optimization_rule.h

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2022-04-04 20:25:01 +02:00
/*------------------------------------------------------------------------------*
* Architecture & Implementation of DBMS *
*------------------------------------------------------------------------------*
* Copyright 2022 Databases and Information Systems Group TU Dortmund *
* Visit us at *
* http://dbis.cs.tu-dortmund.de/cms/en/home/ *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
* OTHER DEALINGS IN THE SOFTWARE. *
* *
* Authors: *
* Maximilian Berens <maximilian.berens@tu-dortmund.de> *
* Roland Kühn <roland.kuehn@cs.tu-dortmund.de> *
* Jan Mühlig <jan.muehlig@tu-dortmund.de> *
*------------------------------------------------------------------------------*
*/
#pragma once
#include "optimizer_rule_interface.h"
#include <database.h>
#include <expression/operation.h>
#include <memory>
#include <optional>
#include <string>
#include <utility>
namespace beedb::plan::logical
{
class IndexScanOptimizationRule : public OptimizerRuleInterface
{
public:
explicit IndexScanOptimizationRule(Database &database) : _database(database)
{
}
~IndexScanOptimizationRule() override = default;
bool optimize(PlanView &plan) override;
private:
Database &_database;
std::pair<std::optional<expression::Attribute>, std::unique_ptr<expression::Operation>> find_index_predicate(
const std::string &table_name, const std::unique_ptr<expression::Operation> &predicate);
};
} // namespace beedb::plan::logical