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Posted to issues@beam.apache.org by "Marek Simunek (JIRA)" <ji...@apache.org> on 2019/01/03 11:52:00 UTC

[jira] [Updated] (BEAM-6350) Reuse same PCollectionView when created in translators

     [ https://issues.apache.org/jira/browse/BEAM-6350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marek Simunek updated BEAM-6350:
--------------------------------
    Summary: Reuse same PCollectionView when created in translators   (was: Reuse PCollectionView when created in translators )

> Reuse same PCollectionView when created in translators 
> -------------------------------------------------------
>
>                 Key: BEAM-6350
>                 URL: https://issues.apache.org/jira/browse/BEAM-6350
>             Project: Beam
>          Issue Type: Improvement
>          Components: dsl-euphoria
>    Affects Versions: 2.11.0
>            Reporter: Marek Simunek
>            Assignee: David Moravek
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> If for LeftJoin is used BroadcastHashJoinTranslator then from right side is created PCollectionView (as sideInput).
> If we use right side in multiple joins then PCollectionView  is created multiple times which is not optimal behavior.
> Eg.
> {code:java}
> LeftJoin.of(left, right)..
> LeftJoin.of(anotherLeftPcollection, right)..
> {code}
>  For example it will happen when we want to solve skew Join.



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