Unique tag values in time interval

InfluxDB 2
1

I’m on influx 2.0. I know that I can find unique tag values on a bucket by

import "influxdata/influxdb/v1"
v1.tagValues(bucket: "bucket-name", tag: "host")

but how do I find unique tag values in a certain time interval for a specific measurement?

2

@todi
Is a filter clause working ?
Maybe like this :

|> filter(fn: (r) => r._measurement == "your_measurement")
|> range(start: -5m)
3

Thanks. No, I can’t do anything like this

import "influxdata/influxdb/v1"
v1.tagValues(bucket: "raw", tag: "serial")
  |> range(start: -5m)
  |> filter(fn: (r) => r._measurement == "reading")

I can of course filter the bucket like this

from(bucket: "raw")
  |> range(start: -5m)
  |> filter(fn: (r) => r._measurement == "reading")

but I don’t know how to count distinct tag values from here.

4

Did you read the doc ?
I can see more parameters like start parameter.
For the measurement I don’t know.

5

Thanks. Somehow I manage to overlook this. The measurement can be put into the predicate. Below gives me the desired.

import "influxdata/influxdb/v1"
v1.tagValues(
    bucket: "my_bucket",
    tag: "my_tag",
    start:-1h,
    predicate: (r) => r._measurement == "my_measurement"
)