nealrichardson commented on PR #34576:
URL: https://github.com/apache/arrow/pull/34576#issuecomment-1470763485

   > So I don't think R is going to give us left.b in the projection for the 
scan options.
   
   It would, the join code in R ensures that the join keys are present at the 
join step, then the select of left.a happens after. Fairly confident we have 
tests covering this, but easy enough to verify. 
   
   If it helps our confidence in this change, this is essentially restoring the 
code we had in the R C++ bindings before the most recent change, which instead 
of copying the code from the R package, it adapted a function that already 
existed in scanner.cc (and apparently wasn't always right). 


-- 
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]

Reply via email to