Documentation function is subject to change at any time. introduces an extend mode to the existing group() function.

Function type signature
(<-tables: stream[A], columns: [string], mode: string) => stream[A] where A: Record

For more information, see Function type signatures.



(Required) List of columns to use in the grouping operation. Default is [].


(Required) Grouping mode. extend is the only mode available to

Grouping modes

  • extend: Appends columns defined in the columns parameter to group keys.


Input data. Default is piped-forward data (<-).


Add a column to the group key

import "experimental"

    |> ["region"], mode: "extend")

View example input and output

Was this page helpful?

Thank you for your feedback!

The future of Flux

Flux is going into maintenance mode. You can continue using it as you currently are without any changes to your code.

Flux is going into maintenance mode and will not be supported in InfluxDB 3.0. This was a decision based on the broad demand for SQL and the continued growth and adoption of InfluxQL. We are continuing to support Flux for users in 1.x and 2.x so you can continue using it with no changes to your code. If you are interested in transitioning to InfluxDB 3.0 and want to future-proof your code, we suggest using InfluxQL.

For information about the future of Flux, see the following: