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https://issues.apache.org/jira/browse/SPARK-51385?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-51385:
-----------------------------------
Assignee: Vladimir Golubev
> Normalize out projection added in DeduplicateRelations for union child output
> deduplication
> -------------------------------------------------------------------------------------------
>
> Key: SPARK-51385
> URL: https://issues.apache.org/jira/browse/SPARK-51385
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 4.1.0
> Reporter: Vladimir Golubev
> Assignee: Vladimir Golubev
> Priority: Major
> Labels: pull-request-available
>
> This is a legacy way to deduplicate relations (just cover the duplicates with
> new Aliases). The single-pass Analyzer does not produce it, because we
> correctly assign expression IDs in single-pass.
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