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https://issues.apache.org/jira/browse/SPARK-26814?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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wuyi resolved SPARK-26814.
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Resolution: Won't Fix
> Avoid unnecessary block concatenation while empty block exists
> --------------------------------------------------------------
>
> Key: SPARK-26814
> URL: https://issues.apache.org/jira/browse/SPARK-26814
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Environment: We should always avoid unnecessary block concatenation
> while empty block exists among the two Blocks, which avoid redundant code
> interpolation for blocks.
> Reporter: wuyi
> Priority: Minor
>
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