experimental.group() function

experimental.group() introduces an extend mode to the existing group() function.

Function type signature

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

Parameters

columns

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

mode

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

Grouping modes

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

tables

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

Examples

Add a column to the group key

import "experimental"

data
    |> experimental.group(columns: ["region"], mode: "extend")