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https://issues.apache.org/jira/browse/SPARK-57544?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-57544:
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Labels: pull-request-available (was: )
> Rework column ID validation for nested fields in DSv2
> -----------------------------------------------------
>
> Key: SPARK-57544
> URL: https://issues.apache.org/jira/browse/SPARK-57544
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 4.2.0
> Reporter: Anton Okolnychyi
> Priority: Major
> Labels: pull-request-available
>
> The original implementation detected dropped-and-re-added columns by
> comparing top-level Column.id() strings in a dedicated validateColumnIds
> pass, but this approach had no visibility into nested struct fields, array
> elements, or map keys/values. To work around this limitation, connectors had
> to encode nested field IDs into the top-level ID string (as demonstrated by
> ComposedColumnIdTableCatalog), placing an unreasonable burden on connector
> authors and making the feature fragile by design.
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