code: def MultiReadClientSnapshot(self, client_ids, cursor=None):
      
      int_ids = [db_utils.ClientIDToInt(cid) for cid in client_ids]
      query = (
          "SELECT h.client_id, h.client_snapshot, UNIX_TIMESTAMP(h.timestamp),"
          "       s.startup_info "
          "FROM clients as c FORCE INDEX (PRIMARY), "
          "client_snapshot_history as h FORCE INDEX (PRIMARY), "
          "client_startup_history as s FORCE INDEX (PRIMARY) "
          "WHERE h.client_id = c.client_id "
          "AND s.client_id = c.client_id "
          "AND h.timestamp = c.last_snapshot_timestamp "
          "AND s.timestamp = c.last_startup_timestamp "
          "AND c.client_id IN ({})").format(", ".join(["%s"] * len(client_ids)))
      ret = {cid: None for cid in client_ids}
      cursor.execute(query, int_ids)
  
      while True:
        row = cursor.fetchone()
        if not row:
          break
        cid, snapshot, timestamp, startup_info = row
        client_obj = mysql_utils.StringToRDFProto(rdf_objects.ClientSnapshot,
                                                  snapshot)
        client_obj.startup_info = mysql_utils.StringToRDFProto(
            rdf_client.StartupInfo, startup_info)
        client_obj.timestamp = mysql_utils.TimestampToRDFDatetime(timestamp)
        ret[db_utils.IntToClientID(cid)] = client_obj
      return ret
docs: Reads the latest client snapshots for a list of clients.