[jira] [Commented] (BEAM-2364) PCollectionView should not be a PValue, it should expand to its underlying PCollection

["Kenneth Knowles (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-2364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16025875#comment-16025875 ] 

Kenneth Knowles commented on BEAM-2364:
---------------------------------------

I notice the added label. We should ensure that this is not backwards incompatible for users, of course.

> PCollectionView should not be a PValue, it should expand to its underlying PCollection
> --------------------------------------------------------------------------------------
>
>                 Key: BEAM-2364
>                 URL: https://issues.apache.org/jira/browse/BEAM-2364
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-java-core
>            Reporter: Kenneth Knowles
>            Assignee: Thomas Groh
>              Labels: backward-incompatible
>
> This bug has been present for a very long time.
> It is a change to {{@Internal}} details but is going to be backwards-incompatible in a couple ways there, because backwards compatible behavior is incorrect. But we need to be very careful with the surrounding logic.
> The particular motivating need is that as long as a PCollectionView expands to only itself, the outputs for surgery and serialization are not correct. There may be a solution involving hardcoded logic, TBD.



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