Method renameDatabase

src/Databases/DatabaseAtomic.cpp:724–796

}

void DatabaseAtomic::renameDatabase(ContextPtr query_context, const String & new_name)
{
    auto component_guard = Coordination::setCurrentComponent("DatabaseAtomic::renameDatabase");
    /// CREATE, ATTACH, DROP, DETACH and RENAME DATABASE must hold DDLGuard
    createDirectories();
    waitDatabaseStarted();
    std::lock_guard lock(mutex);

    bool check_ref_deps = query_context->getSettingsRef()[Setting::check_referential_table_dependencies];
    bool check_loading_deps = !check_ref_deps && query_context->getSettingsRef()[Setting::check_table_dependencies];
    if (check_ref_deps || check_loading_deps)
    {
        for (auto & table : tables)
        {
            checkTableNameLengthUnlocked(new_name, table.first, getContext());

            DatabaseCatalog::instance().checkTableCanBeRemovedOrRenamed({database_name, table.first}, check_ref_deps, check_loading_deps);
        }
    }


    try
    {
        auto db_disk = getDisk();
        if (db_disk->isSymlinkSupported())
            db_disk->removeFileIfExists(path_to_metadata_symlink);
    }
    catch (...)
    {
        LOG_WARNING(log, getCurrentExceptionMessageAndPattern(/* with_stacktrace */ true));
    }

    auto old_metadata_file_path = DatabaseCatalog::getMetadataFilePath(database_name);
    auto new_metadata_file_path = DatabaseCatalog::getMetadataFilePath(new_name);
    auto default_db_disk = getContext()->getDatabaseDisk();
    default_db_disk->moveFile(old_metadata_file_path, new_metadata_file_path);

    String old_path_to_table_symlinks;

    {
        {
            Strings table_names;
            table_names.reserve(tables.size());
            for (auto & table : tables)
                table_names.push_back(table.first);
            DatabaseCatalog::instance().updateDatabaseName(database_name, new_name, table_names);
        }
        database_name = new_name;

        for (auto & table : tables)
        {
            auto table_id = table.second->getStorageID();
            table_id.database_name = database_name;
            table.second->renameInMemory(table_id);
        }

        for (auto & [detached_table_name, snapshot] : snapshot_detached_tables)
        {