Github user viirya commented on the issue:
https://github.com/apache/spark/pull/17831
This change LGTM.
I go to check #17848. It seems to me that the PR simply adds two flags into
ScalaUDF. It appears that there is not API change regarding with existing UDF
registration. I agreed with @holdenk and @HyukjinKwon that it is orthogonal to
this change for now.
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