dongjoon-hyun edited a comment on issue #27803: [SPARK-31049][SQL] Support nested adjacent generators, e.g., explode(explode(v)) URL: https://github.com/apache/spark/pull/27803#issuecomment-605759929 BTW, @maropu . After rethinking about this, the approach of this PR looks okay because it works like the following. So, we support more deep invocation if we add more `explode`. ``` scala> sql("select explode(explode(explode(array(array(array(array(1, 2), array(3, 4)))))))").show() +------+ | col| +------+ |[1, 2]| |[3, 4]| +------+ scala> sql("select explode(explode(explode(explode(array(array(array(array(1, 2), array(3, 4))))))))").show() +---+ |col| +---+ | 1| | 2| | 3| | 4| +---+ ```
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