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Posted to issues@spark.apache.org by "PJ Fanning (JIRA)" <ji...@apache.org> on 2019/05/12 15:02:00 UTC
[jira] [Comment Edited] (SPARK-27683) Remove usage of
TraversableOnce
[ https://issues.apache.org/jira/browse/SPARK-27683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16838086#comment-16838086 ]
PJ Fanning edited comment on SPARK-27683 at 5/12/19 3:01 PM:
-------------------------------------------------------------
[~srowen] would it be possible to use the scala-collection-compat lib? It has a type alias `IterableOnce` that maps to `TraversableOnce` in the scala 2.11 and 2.12 versions of the lib but to the core IterableOnce in 2.13.
[https://github.com/scala/scala-collection-compat/blob/master/compat/src/main/scala-2.11_2.12/scala/collection/compat/PackageShared.scala#L156]
[https://github.com/scala/scala-collection-compat/blob/master/compat/src/main/scala-2.13/scala/collection/compat/package.scala#L22]
The akka team created equivalent type aliases to avoid the dependency on scala-collection-compat and this approach could be used to add additional type aliases that suit Spark's requirements.
was (Author: pj.fanning):
[~srowen] would it be possible to use the scala-collection-compat lib? It has a type alias `IterableOnce` that maps to `TraversableOnce` in the scala 2.11 and 2.12 versions of the lib but to the core IterableOnce in 2.13.
[https://github.com/scala/scala-collection-compat/blob/master/compat/src/main/scala-2.11_2.12/scala/collection/compat/PackageShared.scala#L156]
[https://github.com/scala/scala-collection-compat/blob/master/compat/src/main/scala-2.13/scala/collection/compat/package.scala#L22]
> Remove usage of TraversableOnce
> -------------------------------
>
> Key: SPARK-27683
> URL: https://issues.apache.org/jira/browse/SPARK-27683
> Project: Spark
> Issue Type: Sub-task
> Components: ML, Spark Core, SQL, Structured Streaming
> Affects Versions: 3.0.0
> Reporter: Sean Owen
> Assignee: Sean Owen
> Priority: Major
>
> As with {{Traversable}}, {{TraversableOnce}} is going away in Scala 2.13. We should use {{IterableOnce}} instead. This one is a bigger change as there are more API methods with the existing signature.
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