etseidl commented on issue #9609: URL: https://github.com/apache/arrow-rs/issues/9609#issuecomment-4119852789
Hi @mapleFU 👋. You haven't missed anything. I've not explored this feature much given #7582, but perhaps it's time to kick this again. I definitely see the need for only parsing the column indexes you'll actually use. One issue I can see is figuring out the I/O bounds. Right now we read the entire page index blob into memory, and then parse bits as needed. I could see keeping that and only parsing the requested column indexes to keep I/O simple. Otherwise we could be doing a lot of small fetches. -- 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]
