Github user koertkuipers commented on the issue: https://github.com/apache/spark/pull/13512 well that was sort of what i was trying to achieve. the unit tests i added were for using Aggregator for untyped grouping(```groupBy```). and i think for it to be useful within that context one should also be able to select the columns that the Aggregator operates on.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org