gengliangwang commented on issue #26324: [SPARK-29462] The data type of "array()" should be array<null> URL: https://github.com/apache/spark/pull/26324#issuecomment-549109522 > I agree that compatibility is a minor issue here. But it also sounds like this change allows things to work that did not before. I'm trying to think of cases where something works with the current behavior and not with the new... is there one? Previously `array()` can't be stored into `array<array<?>>` type since string value can't store into array type. After the change in this PR, `array()` can be stored as `array<array<?>>` type, which also seems reasonable..
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