When user requested single column from the table we still calculating all of them. Calculation of some columns is quite expensive (need to do stat calls / read files etc). 
: StorageSystemPartsBase(table_id_,
    {
        {"partition",                                   std::make_shared<DataTypeString>()},
        {"name",                                        std::make_shared<DataTypeString>()},
        {"uuid",                                        std::make_shared<DataTypeUUID>()},
        {"part_type",                                   std::make_shared<DataTypeString>()},
        {"active",                                      std::make_shared<DataTypeUInt8>()},
        {"marks",                                       std::make_shared<DataTypeUInt64>()},
        {"rows",                                        std::make_shared<DataTypeUInt64>()},
        {"bytes_on_disk",                               std::make_shared<DataTypeUInt64>()},
        {"data_compressed_bytes",                       std::make_shared<DataTypeUInt64>()},
        {"data_uncompressed_bytes",                     std::make_shared<DataTypeUInt64>()},
        {"marks_bytes",                                 std::make_shared<DataTypeUInt64>()},
        {"modification_time",                           std::make_shared<DataTypeDateTime>()},
        {"remove_time",                                 std::make_shared<DataTypeDateTime>()},
        {"refcount",                                    std::make_shared<DataTypeUInt32>()},
        {"min_date",                                    std::make_shared<DataTypeDate>()},
        {"max_date",                                    std::make_shared<DataTypeDate>()},
        {"min_time",                                    std::make_shared<DataTypeDateTime>()},
        {"max_time",                                    std::make_shared<DataTypeDateTime>()},
        {"partition_id",                                std::make_shared<DataTypeString>()},
        {"min_block_number",                            std::make_shared<DataTypeInt64>()},
        {"max_block_number",                            std::make_shared<DataTypeInt64>()},
        {"level",                                       std::make_shared<DataTypeUInt32>()},
        {"data_version",                                std::make_shared<DataTypeUInt64>()},
        {"primary_key_bytes_in_memory",                 std::make_shared<DataTypeUInt64>()},