You are viewing a plain text version of this content. The canonical link for it is here.

Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/12/07 06:36:53 UTC

[GitHub] [arrow-datafusion] Dandandan commented on pull request #1402: Transfer right join to left join

Dandandan commented on pull request #1402:
URL: https://github.com/apache/arrow-datafusion/pull/1402#issuecomment-987615421


   I am not sure we would want to do this?
   
   As a user that might want more control over the execution and join order (to save time, memory in a specific query) currently can help DataFusion a bit by using the smaller side in a join as the left side, or even disable the optimization rule to have full control.
   
   This usage becomes harder when we choose to not respect the SQL syntax and instead encode a right join as a left join even if the user carefully picked the smaller left side in his query?
   
   


-- 
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: github-unsubscribe@arrow.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org