alamb commented on issue #17719: URL: https://github.com/apache/datafusion/issues/17719#issuecomment-3383147353
> > I thought that maybe different databases would like to have their own logic for these estimations. Having a trait would allow to adjust this. > > Oh, right haven't thought about it like that. Let's see what [@alamb](https://github.com/alamb) says. Yes, this is exactly my thinking -- the cardinality estimates can get pretty complicated. I think having something reasonable and simple in DataFusion (like based on min/max stats or something) is probably fine. However, other systems might want to add more sophisticated stuff like Histograms, LogLog sketches, etc and it would be nice to allow for that somehow -- 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]
