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Posted to issues@spark.apache.org by "Wenchen Fan (Jira)" <ji...@apache.org> on 2025/07/02 04:55:00 UTC

[jira] [Assigned] (SPARK-52633) Deduplicate output for each `Union` child before `DeduplicateRelations`

     [ https://issues.apache.org/jira/browse/SPARK-52633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan reassigned SPARK-52633:
-----------------------------------

    Assignee: Mihailo Timotic

> Deduplicate output for each `Union` child before `DeduplicateRelations`
> -----------------------------------------------------------------------
>
>                 Key: SPARK-52633
>                 URL: https://issues.apache.org/jira/browse/SPARK-52633
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 4.1.0
>            Reporter: Mihailo Timotic
>            Assignee: Mihailo Timotic
>            Priority: Major
>              Labels: pull-request-available
>
> Deduplicate output for each `Union` child before `DeduplicateRelations`. This is necessary because `DeduplicateRelations` might sometimes accidentally fix single child duplicates, but single-pass analyzer expects this algorithm to trigger every time



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