AssHero commented on PR #3578: URL: https://github.com/apache/arrow-datafusion/pull/3578#issuecomment-1277278493
> I think this optimization might actually slow some plans down (if the filters that are pushed down don't actually filter many rows, they will just consume CPU). I don't have a great suggestion about this I have made some tests on q19 with this optimization on current version, it does not slow down the queries even through it helps little(may consume more CPU). I think more better way is combined with statistic data(CBO). With the statistic data, we can evaluate the rows filtered by this predicate, then make the decision. -- 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]
