I use Grafana table plugin to load a list of alarms stored on InfluxDB onto my Grafana dashboard as shown above. I want to add another column to this table to show how much time has passed since each alarm. I tried the followings on InfluxDB:
- Execute a select statement like “select now() - time from alarms”
- AFAIK, there’s no function now() in the select clause
- Getting the latest time from _internal.runtime and use the last time instead of now()
- cannot use select statement from two measurements
Is it possible only using InfluxQL? Otherwise, should I modify Grafana table plugin to achieve the goal?