':return: A list of all info instances with severity eq INFORMATION'

@requires_setup
def get_all_infos(self):

    query = 'SELECT    pickle    FROM    %s'
    results = self.db.select((query % self.table_name))
    result_lst = []
    for r in results:
        obj = cPickle.loads(r[0])
        if hasattr(obj, 'get_severity'):
            severity = obj.get_severity()
            if (severity in (INFORMATION,)):
                result_lst.append(obj)
    return result_lst
