Github user metasim commented on the issue: https://github.com/apache/spark/pull/16478 @viirya Thanks for the reply and additional info. My (mis)understanding was that when I access the individual struct fields that compose a UDT (say, in an Expression), that I was actually accessing Tungsten memory directly (the reason `InternalRow` exists vs `Row`). Looking forward to seeing how this PR improves the API.
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