def log(db, job_id, timestamp, level, process, message):
    """
    Write a log record in the database.

    :param db:
        a :class:`openquake.server.dbapi.Db` instance
    :param job_id:
        a job ID
    :param timestamp:
        timestamp to store in the log record
    :param level:
        logging level to store in the log record
    :param process:
        process ID to store in the log record
    :param message:
        message to store in the log record
    """
    db('INSERT INTO log (job_id, timestamp, level, process, message) VALUES (?X)'
        , (job_id, timestamp, level, process, message))
