Dandandan commented on issue #18411: URL: https://github.com/apache/datafusion/issues/18411#issuecomment-3666735206
> > Is there a mechanism in DataFusion already to carry the necessary meta information from the table all the way to the aggregation? The Arrow physical types alone aren't sufficiently rich to model that. > > I wonder if using an actual DictionaryArray<Int8, Utf8> (with a Int8 index) would get us most of the performance win here 🤔 Not sure this would gain much, ideally `UInt8Array` would be used as physical type, maybe supported by an extension type? -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
