the80srobot opened a new issue, #7193: URL: https://github.com/apache/arrow-rs/issues/7193
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** At the moment, there is no way to generically iterate over field builders in a StructBuilder, e.g. to check their `len()`. **Describe the solution you'd like** Calling `StructBuilder::field_builder` requires knowing the concrete type of the ArrayBuilder in that column, but that should not be necessary. In fact, returning a reference to the `Box` would be sufficient, because `Box<dyn ArrayBuilder>` already implements `ArrayBuilder`. **Describe alternatives you've considered** I can think of no alternatives. -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
