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https://issues.apache.org/jira/browse/CRUNCH-118?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Friedrich updated CRUNCH-118:
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Attachment: CRUNCH-118v3.patch
Great stuff! I think SAMPLE_UNIQUE_ELEMENTS() isn't really random, so I removed
this from the javadoc and I've made a couple of trivial tweaks.
+1, with or without my changes :)
> Add Aggregator and lib functionality for computing the distinct elements of a
> PCollection
> -----------------------------------------------------------------------------------------
>
> Key: CRUNCH-118
> URL: https://issues.apache.org/jira/browse/CRUNCH-118
> Project: Crunch
> Issue Type: Improvement
> Components: MapReduce Patterns
> Reporter: Josh Wills
> Attachments: CRUNCH-118.patch, CRUNCH-118v2.patch, CRUNCH-118v3.patch
>
>
> In my continuing effort to add functions that I like from Hive/Pig to Crunch,
> I'm proposing a) an Aggregator that behaves like Hive's collect_set() UDAF
> and b) an o.a.c.lib.Distinct library for computing the distinct elements of a
> PCollection via a groupByKey operation.
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