scovich commented on issue #7119: URL: https://github.com/apache/arrow-rs/issues/7119#issuecomment-2652194317
> When projecting a nested column, one must take into account the validity masks of any parents. That's surprising and painfully row-oriented for a column-oriented format -- especially for wide schemas. But if that's the spec that's the spec, I guess. > > why does the JSON reader take pains to do it in the expected way > > Arguably it probably shouldn't, and probably suffers from the same issue as https://github.com/apache/arrow-rs/issues/6510 If JSON reader does have to change, perhaps it can be flagged as a breaking change with a major version bump instead of sneaking out in a point release? -- 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
