ClickHouse/dbms/src/Databases/DatabaseOrdinary.h

#pragma once

#include <Databases/DatabaseMemory.h>


namespace DB
{

/** Default engine of databases.
  * It stores tables list in filesystem using list of .sql files,
  *  that contain declaration of table represented by SQL ATTACH TABLE query.
  */
class DatabaseOrdinary : public DatabaseMemory
{
protected:
    const String metadata_path;
    const String data_path;

public:
    DatabaseOrdinary(const String & name_, const String & metadata_path_, const Context & context);

    String getEngineName() const override { return "Ordinary"; }

    void loadTables(
        Context & context,
        ThreadPool * thread_pool,
        bool has_force_restore_data_flag) override;

    void createTable(
        const Context & context,
        const String & table_name,
        const StoragePtr & table,
        const ASTPtr & query) override;

    void removeTable(
        const Context & context,
        const String & table_name) override;

    void renameTable(
        const Context & context,
        const String & table_name,
        IDatabase & to_database,
        const String & to_table_name) override;

    void alterTable(
        const Context & context,
        const String & name,
        const NamesAndTypesList & columns,
        const NamesAndTypesList & materialized_columns,
        const NamesAndTypesList & alias_columns,
        const ColumnDefaults & column_defaults,
        const ASTModifier & engine_modifier) override;

    time_t getTableMetadataModificationTime(
        const Context & context,
        const String & table_name) override;

    ASTPtr getCreateQuery(
        const Context & context,
        const String & table_name) const override;

    String getDataPath() const override;
    String getMetadataPath() const override;
    String getTableMetadataPath(const String & table_name) const override;

    void shutdown() override;
    void drop() override;

private:
    void startupTables(ThreadPool * thread_pool);
};

}