[GitHub] [spark] viirya commented on pull request #29645: [SPARK-32796][SQL] Make withField API support nested struct in array

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viirya commented on pull request #29645:
URL: https://github.com/apache/spark/pull/29645#issuecomment-687337325


   @cloud-fan @HyukjinKwon Thanks for comment. So let me get more ideas from you. This is like a syntax sugar to more easily express complex nested `withField` chain. I think we can explicitly expression it by using `transform` + `withField`, but as it goes deeply more, the syntax becomes hard to express and read. This doesn't create new syntax other than `a.b` used to access nested field in array, but just leverages existing one.


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