I was trying to add to the SQuaSH dashboards a single stat showing the time of the last validate_drp measurement - it turns out that stats visualization does not display timestamps, only numbers, and it is not possible to do math on timestamps in InfluxQL to get say "number of days without measurements"

https://github.com/influxdata/docs.influxdata.com/blob/master/content/influxdb/v0.13/troubleshooting/frequently_encountered_issues.md#doing-math-on-timestamps

So I think it is a good idea to add the timestamp of the measurement as a new field, as we did for the EFD topics, there that information was useful to report on things like latency for instance.