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https://issues.apache.org/jira/browse/SPARK-3655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14236287#comment-14236287
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Patrick Wendell commented on SPARK-3655:
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+1 to Sandy's comment. I think groupByKeyAndSortValues is really good to have
(also, it would be good to include Java and Python versions for this since we
do this for all new API's now). foldByKey is a little more esoteric, that might
be one we want in user libraries rather than in Spark core.
> Support sorting of values in addition to keys (i.e. secondary sort)
> -------------------------------------------------------------------
>
> Key: SPARK-3655
> URL: https://issues.apache.org/jira/browse/SPARK-3655
> Project: Spark
> Issue Type: New Feature
> Components: Spark Core
> Affects Versions: 1.1.0
> Reporter: koert kuipers
> Assignee: Koert Kuipers
> Priority: Minor
>
> Now that spark has a sort based shuffle, can we expect a secondary sort soon?
> There are some use cases where getting a sorted iterator of values per key is
> helpful.
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