panbingkun commented on PR #48261:
URL: https://github.com/apache/spark/pull/48261#issuecomment-2378263109

   > I have also noticed this phenomenon before, which is quite common in 
Spark's expression functions. I guess the `NullIntolerant` lead to the result. 
`NullIntolerant` is a specification that most expression followed. I don't know 
if we need to break this constraint.
   
   Yea, that's it (`NullIntolerant`)


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