chenkovsky commented on PR #14057: URL: https://github.com/apache/datafusion/pull/14057#issuecomment-2621231579
> > Then we cannot make sure metadata columns always have same column index in different tables > > Not quite understand the reason, with modified metadata, meta column could be considered as the same column like the normal one inside `Schema`. **Field index** for accessing field in `Schema` in contiguous like before, indices are changed if the schema is changed. the question whether treat metadata column like normal column, I want to listen more ideas. by the way, at the beginning, I didn't use offset to separate metadata column and normal column. you said that it's error prone. I think when we do schema migration, non-stable column index is really error prone. did I misunderstand something? -- 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...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
