metegenez commented on issue #17494: URL: https://github.com/apache/datafusion/issues/17494#issuecomment-3337794157
> But in this case, I agree the biggest improvement probably comes from a global join ordering algorithm rather than tweaks to the hash join algorithm. What we have should be sufficient if the statistical estimations are accurate (which is quite hard to do). The JoinSelection physical optimizer already performs join reordering, but I suspect the statistics aren’t precise enough to guide reordering effectively at higher join levels. -- 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]
