beedb/include/io/command/custom_commands.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 "custom_command_interface.h"
#include <network/server.h>
namespace beedb::io::command
{
class ShowCommand final : public CustomCommandInterface
{
public:
ShowCommand() = default;
~ShowCommand() override = default;
[[nodiscard]] std::optional<ExecutionResult> execute(const std::string &parameters, Executor &executor,
ExecutionCallback &execution_callback) override;
[[nodiscard]] std::string help() override
{
return std::string("Syntax> :show [tables,indices,columns]{1}");
};
};
class ExplainCommand final : public CustomCommandInterface
{
public:
ExplainCommand() = default;
~ExplainCommand() override = default;
[[nodiscard]] std::optional<ExecutionResult> execute(const std::string &input, Executor &executor,
ExecutionCallback &execution_callback) override;
[[nodiscard]] std::string help() override
{
return std::string("Syntax> :explain <SQL-Statement>");
};
};
class SetCommand final : public CustomCommandInterface
{
public:
explicit SetCommand(Config &config) : _config(config)
{
}
~SetCommand() override = default;
[[nodiscard]] std::optional<ExecutionResult> execute(const std::string &input, Executor &executor,
ExecutionCallback &execution_callback) override;
[[nodiscard]] std::string help() override
{
return std::string("Syntax> :set <Argument Name> <Numerical Value>");
};
private:
Config &_config;
};
class GetCommand final : public CustomCommandInterface
{
public:
explicit GetCommand(Config &config) : _config(config)
{
}
~GetCommand() override = default;
[[nodiscard]] std::optional<ExecutionResult> execute(const std::string &input, Executor &executor,
ExecutionCallback &execution_callback) override;
[[nodiscard]] std::string help() override
{
return std::string("Syntax> :get [<Argument Name>]?");
};
private:
Config &_config;
};
class StatsCommand final : public CustomCommandInterface
{
public:
explicit StatsCommand(Database &db) : _stats(db.system_statistics()), _db(db)
{
}
~StatsCommand() override = default;
/**
* @brief execute This triggers computation of statistics for a specified,
* existing table. After confirming that the table exists,
* computations are triggered.
* @param input the table name
* @return the plan that computes the statistics
*/
[[nodiscard]] std::optional<ExecutionResult> execute(const std::string &input, Executor &executor,
ExecutionCallback &execution_callback) override;
[[nodiscard]] std::string help() override
{
return std::string("Syntax> :stats <Table Name>");
};
private:
statistic::SystemStatistics &_stats;
Database &_db;
};
class StopServerCommand final : public CustomCommandInterface
{
public:
explicit StopServerCommand(network::Server *server) : _server(server)
{
}
~StopServerCommand() override = default;
[[nodiscard]] std::optional<ExecutionResult> execute(const std::string &parameters, Executor &executor,
ExecutionCallback &execution_callback) override;
[[nodiscard]] std::string help() override
{
return std::string("Syntax> :stop");
}
private:
network::Server *_server;
};
} // namespace beedb::io::command