def METHOD_NAME(self, table_name, key):
    """
    Log a completed job.  When a job is completed, its reservation entry is deleted.
    :param table_name: `database`.`table_name`
    :param key: the dict of the job's primary key
    """
    job_key = dict(table_name=table_name, key_hash=key_hash(key))
    (self & job_key).delete_quick()