def METHOD_NAME(cls):
    """ Return a parser object with options relevant for input databases"""
    db_opts_parser = argparse.ArgumentParser(add_help=False)
    dp_opts_group = db_opts_parser.add_argument_group(
        description ="Options for Input databases")
    db_opts_parser.add_argument("--inputDBRcd",
        help="Record used for PoolDBESSource")
    db_opts_parser.add_argument("--inputDBTag",
        help="Tag used for PoolDBESSource")
    db_opts_parser.add_argument("--connectStrDBTag",
        default='frontier://FrontierProd/CMS_COND_31X_DT',
        help="connect string default:%(default)s")
    return db_opts_parser