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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2019/04/25 13:59:00 UTC
[jira] [Assigned] (SPARK-27536) Code improvements for 3.0:
existentials edition
[ https://issues.apache.org/jira/browse/SPARK-27536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-27536:
------------------------------------
Assignee: Sean Owen (was: Apache Spark)
> Code improvements for 3.0: existentials edition
> -----------------------------------------------
>
> Key: SPARK-27536
> URL: https://issues.apache.org/jira/browse/SPARK-27536
> Project: Spark
> Issue Type: Improvement
> Components: ML, Spark Core, SQL, Structured Streaming
> Affects Versions: 3.0.0
> Reporter: Sean Owen
> Assignee: Sean Owen
> Priority: Major
>
> The Spark code base makes use of 'existential types' in Scala, a language feature which is quasi-deprecated -- it generates a warning unless scala.language.existentials is imported, and there is talk of removing it from future Scala versions: https://contributors.scala-lang.org/t/proposal-to-remove-existential-types-from-the-language/2785
> We can get rid of most usages of this feature with lots of minor changes to the code. A PR is coming to demonstrate what's involved.
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