tustvold opened a new issue, #1590: URL: https://github.com/apache/arrow-rs/issues/1590
**Describe the bug** > Unlike other data types, unions do not have their own validity bitmap. Instead, the nullness of each slot is determined exclusively by the child arrays which are composed to create the union. From https://arrow.apache.org/docs/format/Columnar.html#union-layout **To Reproduce** We currently support this, which aside from adding a lot of complexity, is incorrect **Expected behavior** We shouldn't support something not in the arrow specification -- 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.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
