Max-Meldrum commented on issue #290: URL: https://github.com/apache/arrow-rs/issues/290#issuecomment-841617101
> Thanks for this. > > Honest curiosity: what is the use-case where the ArrayBuilder is passed around? > > Also, isn't it possible to use `&dyn ArrayBuilder + Send` on the code to enforce this? Well it is not so much the ArrayBuilder being sent around, but it is a StructBuilder that is passed around which itself contains a bunch of field builders of ``Box<ArrayBuilder>``. The use case is that a ``StructBuilder`` is used to build up columnar data in a streaming window. During the length of this window, the "worker" may move across threads as the underlying thread model uses a workstealing scheduler. -- 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. For queries about this service, please contact Infrastructure at: [email protected]
