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From Jean-Baptiste Onofré (JIRA) <j...@apache.org>
Subject [jira] [Commented] (BEAM-638) Add a Window function to create a bounded PCollection from an unbounded one
Date Mon, 03 Oct 2016 09:54:20 GMT

    [ https://issues.apache.org/jira/browse/BEAM-638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15542018#comment-15542018
] 

Jean-Baptiste Onofré commented on BEAM-638:
-------------------------------------------

We can have a trigger to create a bounded PCollection for an unbounded. Currently, the IO
(especially sink) expect bounded PCollection: so, if the source provides an unbounded PCollection,
it's useless.

> Add a Window function to create a bounded PCollection from an unbounded one
> ---------------------------------------------------------------------------
>
>                 Key: BEAM-638
>                 URL: https://issues.apache.org/jira/browse/BEAM-638
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-java-core
>            Reporter: Jean-Baptiste Onofré
>            Assignee: Davor Bonaci
>
> Today, if the pipeline source is unbounded, and the sink expects a bounded collection,
there's no way to use a single pipeline. Even a window creates a chunk on the unbounded PCollection,
but the "sub" PCollection is still unbounded.
> It would be helpful for users to have a Window function that create a bounded PCollection
(on the window) from an unbounded PCollection coming from the source.



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