peter-toth opened a new pull request #27675: [SPARK-30870][SQL] Fix nested column aliasing URL: https://github.com/apache/spark/pull/27675 ### What changes were proposed in this pull request? This PR fixes a bug in nested column aliasing by taking into account the data type of the referenced nested field to calculate the number of extracted columns. After this PR this query runs without issues: ``` SELECT explodedvalue.* FROM VALUES array(named_struct('nested', named_struct('a', 1, 'b', 2))) AS (value) LATERAL VIEW explode(value) AS explodedvalue ``` This is a regression from Spark 2.4. ### Why are the changes needed? To fix a bug. ### Does this PR introduce any user-facing change? No. ### How was this patch tested? Added new UT.
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