comphead commented on issue #17267: URL: https://github.com/apache/datafusion/issues/17267#issuecomment-3366176816
SMJ may require more memory and additional expenses on sorting, so the HJ would be faster in most cases. But SMJ is more robust on limited memory if implemented correctly. Optimized SMJ can be awesome, some notes on optimization here https://cs186berkeley.net/notes/note9/#an-important-refinement DF SMJ still missing some optimizations so it is possible to end up with what @camuel faced. -- 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]
