gatorsmile commented on issue #27503: [SPARK-30761]SQL] Nested column pruning should not prune on required child outputs in Generate URL: https://github.com/apache/spark/pull/27503#issuecomment-583805648 > If a child output is required in a top operator of Generate, we should not prune nested fields on it. Otherwise, the accessors on top operator could be unresolved. Do we traverse all the ancestor nodes?
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