Function parseKeyNameFromImplicitFileName

src/DataTypes/MapHelpers.cpp:221–234

}

String parseKeyNameFromImplicitFileName(const String & implicit_file_name, const String & map_col)
{
    String prefix = getMapKeyPrefix(map_col);
    String unescape_file_name = unescapeForFileName(implicit_file_name);
    if (!startsWith(unescape_file_name, prefix))
        throw Exception(ErrorCodes::INVALID_IMPLICIT_COLUMN_FILE_NAME, "Implicit file name {} is not belong to map column {} ", implicit_file_name, map_col);

    auto extension_loc = implicit_file_name.find('.'); /// only extension contain dot, other dots in column name are escaped.
    if (extension_loc == String::npos)
        throw Exception(ErrorCodes::INVALID_IMPLICIT_COLUMN_FILE_NAME, "Invalid file name of implicit column: {]", implicit_file_name);
    size_t extension_size = implicit_file_name.size() - extension_loc;

    return unescape_file_name.substr(prefix.size(), unescape_file_name.size() - prefix.size() - extension_size);
}

String parseMapNameFromImplicitColName(const String & implicit_column_name)
{