[jira] [Commented] (BEAM-10005) Unable to use ApproximateQuantiles.globally/ApproximateUnique.globally when inputs not windowed by GlobalWindows

["Beam JIRA Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-10005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17204894#comment-17204894 ] 

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: 2h 20m
>  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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