mooreniemi opened a new issue #2101: URL: https://github.com/apache/arrow-datafusion/issues/2101
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** Coming from Spark, Pandas, and Polars, I am used to being able to do `with_column` and/or `apply` using a `udf` to add columns to my dataframes. [Here's an example of doing that using Polars `DataFrame`](https://github.com/mooreniemi/parq/blob/main/examples/polars_w_col_lazy.rs#L16). I may be misunderstanding how it can be accomplished with Datafusion or the Datafusion goals, but I can't find a way to do this so far. I know udfs are supported, and can be used in sql queries, but [DataFrame](https://docs.rs/datafusion/latest/datafusion/dataframe/trait.DataFrame.html) doesn't seem to have anything like `apply` or `with_column`. Is this outside the roadmap of Datafusion or have I misunderstood available methods? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
