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https://issues.apache.org/jira/browse/BEAM-10005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17160080#comment-17160080
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Beam JIRA Bot commented on BEAM-10005:
--------------------------------------
This issue is assigned but has not received an update in 30 days so it has been
labeled "stale-assigned". If you are still working on the issue, please give an
update and remove the label. If you are no longer working on the issue, please
unassign so someone else may work on it. In 7 days the issue will be
automatically unassigned.
> Unable to use ApproximateQuantiles.globally/ApproximateUnique.globally when
> inputs not windowed by GlobalWindows
> ----------------------------------------------------------------------------------------------------------------
>
> Key: BEAM-10005
> URL: https://issues.apache.org/jira/browse/BEAM-10005
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Affects Versions: 2.20.0
> Reporter: Darshan Jani
> Assignee: Darshan Jani
> Priority: P2
> Labels: stale-assigned
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> Unable to use ApproximateQuantiles.globally or ApproximateUnique.globally
> with input windowed not using GlobalWindows.
> To make it run we need to set either
> {code:java}
> .withoutDefaults()
> {code}
> or
> {code:java}
> .asSingletonView()
> {code}
> Currently we can't call any of the above on
> ApproximateQuantiles.globally()/ApproximateUnique.globally as it does not
> return underlying Combine.globally, but PTransform or Globally<T> in case of
> ApproximateUnique.
> Example failing case:
> {code:java}
> PCollection<Long> elements = p.apply(GenerateSequence.from(0).to(100)
> .withRate(1,Duration.millis(1)).withTimestampFn(Instant::new));
> PCollection<List<Long>> input = elements
>
> .apply(Window.into(SlidingWindows.of(Duration.millis(3)).every(Duration.millis(1))))
> .apply(ApproximateQuantiles.globally(17));
> {code}
> It throws expected error from internal Combine.globally() transform:
> {code:java}
> Default values are not supported in Combine.globally() if the input
> PCollection is not windowed by GlobalWindows. Instead, use
> Combine.globally().withoutDefaults() to output an empty PCollection if the
> input PCollection is empty, or Combine.globally().asSingletonView() to get
> the default output of the CombineFn if the input PCollection is empty.
> {code}
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