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https://issues.apache.org/jira/browse/SPARK-56273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18069166#comment-18069166
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Yan Yan commented on SPARK-56273:
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https://github.com/apache/spark/pull/55070
> Simplify extracting fields from DataSourceV2ScanRelation
> --------------------------------------------------------
>
> Key: SPARK-56273
> URL: https://issues.apache.org/jira/browse/SPARK-56273
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 4.2.0
> Reporter: Yan Yan
> Priority: Minor
> Labels: pull-request-available
>
> `DataSourceV2ScanRelation` is a case class with 5 fields. Many pattern match
> sites only need the scan field or a subset of (relation, scan, output), using
> wildcards for the rest. This couples every match site to the constructor
> arity, so adding or removing fields requires updating all of them.
>
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