Return a list of all job ids

def get_jids():
    '''
    Return a list of all job ids
    '''
    serv = _get_serv(ret=None)
    sql = "select distinct(jid) from jids group by load"

    # [{u'points': [[0, jid, load],
    #               [0, jid, load]],
    #   u'name': u'jids',
    #   u'columns': [u'time', u'distinct', u'load']}]
    data = serv.query(sql)
    ret = {}
    if data:
        for _, jid, load in data[0]['points']:
            ret[jid] = salt.utils.jid.format_jid_instance(jid, salt.utils.json.loads(load))
    return ret