Function parseMapNameFromImplicitFileName

src/DataTypes/MapHelpers.cpp:201–219

}

String parseMapNameFromImplicitFileName(const String & implicit_file_name)
{
    String unescape_file_name = unescapeForFileName(implicit_file_name);
    if (!startsWith(unescape_file_name, getMapSeparator()))
        throw Exception(ErrorCodes::INVALID_IMPLICIT_COLUMN_NAME, "Invalid implicit file name: {}", implicit_file_name);

    /// Base file need to use implicit file name instead of unescape_file_name
    auto location_base = implicit_file_name.find("_base.", getMapSeparator().size());
    if (location_base == String::npos)
    {
        /// Due to map column name meets the constraint in MergeTreeMetaBase::checkColumnsValidity, so we can find second separator directly.
        auto location = unescape_file_name.find(getMapSeparator(), getMapSeparator().size());
        if (location == String::npos)
            throw Exception(ErrorCodes::INVALID_IMPLICIT_COLUMN_NAME, "Invalid implicit column name: {}", implicit_file_name);
        return unescape_file_name.substr(getMapSeparator().size(), location - getMapSeparator().size());
    }
    else
        return unescapeForFileName(implicit_file_name.substr(getMapSeparator().size(), location_base - getMapSeparator().size()));
}

String parseKeyNameFromImplicitFileName(const String & implicit_file_name, const String & map_col)
{