Liang-Chi Hsieh created SPARK-27701:
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Summary: Extend NestedColumnAliasing to more nested field cases
Key: SPARK-27701
URL: https://issues.apache.org/jira/browse/SPARK-27701
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: Liang-Chi Hsieh
{{NestedColumnAliasing}} rule covers {{GetStructField}} only, currently. It
means that some nested field extraction expressions aren't pruned. For example,
if only accessing a nested field in an array of struct, this column isn't
pruned. This patch extends the rule to cover such cases.
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