alamb commented on issue #10048: URL: https://github.com/apache/datafusion/issues/10048#issuecomment-2294825820
> IIUC the right way to approach the problem here is to implement better (ideally full) query decorrelation as described [in this paper](https://btw-2015.informatik.uni-hamburg.de/res/proceedings/Hauptband/Wiss/Neumann-Unnesting_Arbitrary_Querie.pdf). BTW I finally got around to reading this paper the other week. DataFusion does not implement the fullly general decorrelation alluded to in that paper, but instead implements the "basic TPCH style" decorrelations for most subqueries (aka the basic correlations). Thus I suspect some of the lateral queries might "just work" once a plan is created for them -- 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]
