Comment 1 for bug 607147

Here is the section of the code that causes the message to appear:

  /* Check virtual columns against table's storage engine. */
  if (share->vfields &&
        ((outparam->file &&
          !outparam->file->check_if_supported_virtual_columns()) ||
         (!outparam->file && share->db_type() &&
           share->db_type()->db_type == DB_TYPE_CSV_DB))) // Workaround for CSV
  {
    my_error(ER_UNSUPPORTED_ACTION_ON_VIRTUAL_COLUMN,
             MYF(0),
             "Specified storage engine");
    error_reported= TRUE;
    goto err;
  }