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https://issues.apache.org/jira/browse/SPARK-27633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-27633:
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Affects Version/s: (was: 3.0.0)
3.1.0
> Remove redundant aliases in NestedColumnAliasing
> ------------------------------------------------
>
> Key: SPARK-27633
> URL: https://issues.apache.org/jira/browse/SPARK-27633
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: L. C. Hsieh
> Priority: Major
>
> In NestedColumnAliasing rule, we create aliases for nested field access in
> project list. We considered that top level parent field and nested fields
> under it were both accessed. In the case, we don't create the aliases because
> they are redundant.
> There is another case, where a nested parent field and nested fields under it
> were both accessed, which we don't consider now. We don't need to create
> aliases in this case too.
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