def importStart():

    dss = DbSeoulSubway()
    if dss.open_api_service_connection() is False:
        raise OpenServiceDataImporterException("Can't not Open Database Connection")

    svc_nm = SB_SERVICE.SVC_SEARCHVIASTNARRIVALTIMEBYTRAINSERVICE
    dss.tables_truncate(svc_nm)

    trains      = dss.get_all_train_no()
    inouts      = SB_API_PARAM.INOUT_TAG.list()
    weeks       = SB_API_PARAM.WEEK_TAG.list()


    for train in trains:
        for inout in inouts:
            for week in weeks:
                sub_result = _importSpecific(dss, svc_nm, train, week, inout)
                if sub_result is False:
                    raise OpenServiceDataImporterException("SVC_SEARCHVIASTNARRIVALTIMEBYTRAINSERVICE ImportFailed...")

    dss.close_api_service_connection(True)
    return True