HyukjinKwon commented on issue #21732: [SPARK-24762][SQL] Enable Option of Product encoders URL: https://github.com/apache/spark/pull/21732#issuecomment-450158698 Hm .. sorry for joining this party late. I was reading and testing it by myself. ```scala scala> Seq((1, "a"), (2, "b")).toDF.show() +---+---+ | _1| _2| +---+---+ | 1| a| | 2| b| +---+---+ scala> Seq(1, 2).toDF.show() +-----+ |value| +-----+ | 1| | 2| +-----+ ``` ```scala scala> Seq(Some((1, "a")), Some((2, "b"))).toDF.show() +------+ | value| +------+ |[1, a]| |[2, b]| +------+ scala> Seq(Some(1), Some(2)).toDF.show() +-----+ |value| +-----+ | 1| | 2| +-----+ ``` I think this behaviour can be actually controversial. If we interpret `Option` as existent/missing value. Why did we interpret `Option` as `Tuple1`?
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