jayzhan211 commented on issue #5426: URL: https://github.com/apache/arrow-rs/issues/5426#issuecomment-1962788101
For List, we iterate the pair of elements and get the `Compare` for each of them. How do we determine the final single `Compare` based on them without `null_first`? In this case, we may need to collect the list of `Compare` until we know what `null_first` is, which is when ``ordering(null_first)` is called after collecting all the sub-`Compare` for the nested list. For a higher dimension list, we need to collect more. It seems to be more memory efficient to have the `null_first` info in the first place, so we can evaluate the actual ordering early, instead of collecting them and evaluate at the end. -- 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
