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Posted to issues@spark.apache.org by "Hyukjin Kwon (Jira)" <ji...@apache.org> on 2020/01/31 07:15:00 UTC
[jira] [Resolved] (SPARK-30671) SparkSession emptyDataFrame should
not create an RDD
[ https://issues.apache.org/jira/browse/SPARK-30671?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hyukjin Kwon resolved SPARK-30671.
----------------------------------
Fix Version/s: 3.0.0
Resolution: Fixed
Issue resolved by pull request 27400
[https://github.com/apache/spark/pull/27400]
> SparkSession emptyDataFrame should not create an RDD
> ----------------------------------------------------
>
> Key: SPARK-30671
> URL: https://issues.apache.org/jira/browse/SPARK-30671
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 2.4.4
> Reporter: Herman van Hövell
> Assignee: Herman van Hövell
> Priority: Major
> Fix For: 3.0.0
>
>
> SparkSession.emptyDataFrame uses an empty RDD in the background. This is a bit of a pity because the optimizer can't recognize this as being empty and it won't apply things like {{PropagateEmptyRelation}}.
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