I couldn't find much documentation on this. How do I query InfluxDB to show me current database system time and date?
SHOW DIAGNOSTICS
will do it, if you're an admin.
If you're not an admin, you can cheat:
precision rfc3339
INSERT foo,dummy_tag="time_test" testval=0i
SELECT last(*) FROM foo
Which is a bit awkward. This might deserve a feature request on their github page: https://github.com/influxdata/influxdb/issues