set() function

set() assigns a static column value to each row in the input tables.

set() may modify an existing column or add a new column. If the modified column is part of the group key, output tables are regrouped as needed. set() can only set string values.

Function type signature
(<-tables: stream[A], key: string, value: string) => stream[A] where A: Record
For more information, see Function type signatures.



(Required) Label of the column to modify or set.


(Required) String value to set.


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


Set a column to a specific string value

import "sampledata"
    |> set(key: "host", value: "prod1")

View example input and output

Was this page helpful?

Thank you for your feedback!

Introducing InfluxDB 3.0

The new core of InfluxDB built with Rust and Apache Arrow. Available today in InfluxDB Cloud Dedicated.

Learn more

State of the InfluxDB Cloud Serverless documentation

The new documentation for InfluxDB Cloud Serverless is a work in progress. We are adding new information and content almost daily. Thank you for your patience!

If there is specific information you’re looking for, please submit a documentation issue.