Frankonly opened a new issue, #3549: URL: https://github.com/apache/arrow-rs/issues/3549
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** <!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] (This section helps Arrow developers understand the context and *why* for this feature, in addition to the *what*) --> IPC file footer support customer metadata, but arrow-rs's IPC file writer and reader doesn't support it. **Describe the solution you'd like** <!-- A clear and concise description of what you want to happen. --> Add a `Option<HashMap>` field into `IpcWriteOptions` for inserting customer metadata. Add a public function `customer_metadata(&self)` for readers to access customer metadata. **Additional context** <!-- Add any other context or screenshots about the feature request here. --> We already have customer metadata in `Schema`. However, writer/reader need to process it twice at both of header and foot of IPC file, furthermore, it will be attached on each record batch produced by reader but the customer metadata is only used for the file and program doesn't hope it exist at each record batch. Therefore, customer metadata in footer is necessary. -- 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]
