code: def ReadCronJobRun(self, job_id, run_id, cursor=None):
      
      query = ("SELECT run, UNIX_TIMESTAMP(write_time) FROM cron_job_runs "
               "WHERE job_id = %s AND run_id = %s")
      num_runs = cursor.execute(
          query, [job_id, db_utils.CronJobRunIDToInt(run_id)])
      if num_runs == 0:
        raise db.UnknownCronJobRunError(
            "Run with job id %s and run id %s not found." % (job_id, run_id))
  
      return self._CronJobRunFromRow(cursor.fetchall()[0])
docs: Reads a single cron job run from the db.