dongjoon-hyun commented on code in PR #55476:
URL: https://github.com/apache/spark/pull/55476#discussion_r3126684490


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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala:
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Review Comment:
   ~Hmm. Maybe, it's related to the previous Wenchen's comment, but it's a 
little counter-intuitive to use `$pos` again from here. If it's for `looping` 
variable arithmetic, it would be great to add a one-line comment about why we 
need to use `$pos` instead of `posLong`.~



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