beedb/include/execution/create_index_operator.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 "operator_interface.h"
#include <database.h>
#include <index/type.h>
#include <string>
#include <table/table.h>
#include <table/tuple.h>
#include <table/type.h>
#include <tuple>
#include <vector>
namespace beedb::execution
{
/**
* Operator that creates and persists a new index for a given
* column with given index attributes (type, unique or non-unique).
*/
class CreateIndexOperator final : public OperatorInterface
{
public:
CreateIndexOperator(Database &database, concurrency::Transaction *transaction, const std::string &table_name,
const std::string &column_name, const std::string &index_name, const bool is_unique,
const index::Type type);
~CreateIndexOperator() override = default;
void open() override
{
}
util::optional<table::Tuple> next() override;
void close() override
{
}
[[nodiscard]] const table::Schema &schema() const override
{
return _schema;
}
[[nodiscard]] bool yields_data() const override
{
return false;
}
private:
const table::Schema _schema;
Database &_database;
const std::string _table_name;
const std::string _column_name;
const std::string _index_name;
const bool _is_unique;
const index::Type _index_type;
};
} // namespace beedb::execution