Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/20541
I don't agree. `a + 1`/`a + b` are evaluated the same number of time, no
matter you push in through Union or not. I don't see any performance benefit by
doing this, except you can eliminate the entire project above Union.--- --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
