alamb commented on issue #15780: URL: https://github.com/apache/datafusion/issues/15780#issuecomment-2905459928
> What about in the situation described above? What happens now is basically that both columns get cast to Int32 to match their table level types. But that's at least one extra cast. And there's cases like structs with extra fields where I don't think it makes sense to do any cast: if the file type has extra fields it's a compatible with any function that operates on the table type that has a subset of the fields. I predict that the 'extra fields' usecase is going to be the one that will be the most important and will drive this feature (as perfomance will be disasterous without it) -- 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
