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https://issues.apache.org/jira/browse/SPARK-24953?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-24953:
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Assignee: (was: Apache Spark)
> Prune a branch in `CaseWhen` if previously seen
> -----------------------------------------------
>
> Key: SPARK-24953
> URL: https://issues.apache.org/jira/browse/SPARK-24953
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: DB Tsai
> Priority: Major
>
> If a condition in a branch is previously seen, this branch can be pruned.
> If the outputs of two adjacent branches are the same, two branches can be
> combined.
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