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Posted to commits@beam.apache.org by "Anton Kedin (JIRA)" <ji...@apache.org> on 2017/12/13 22:30:00 UTC

[jira] [Commented] (BEAM-3191) [SQL] Implement Stateful Join

    [ https://issues.apache.org/jira/browse/BEAM-3191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16290047#comment-16290047 ] 

Anton Kedin commented on BEAM-3191:
-----------------------------------

First we need to understand what meaningful join would mean

> [SQL] Implement Stateful Join
> -----------------------------
>
>                 Key: BEAM-3191
>                 URL: https://issues.apache.org/jira/browse/BEAM-3191
>             Project: Beam
>          Issue Type: Bug
>          Components: dsl-sql
>            Reporter: Anton Kedin
>
> For binary key-joins, we probably could implement stateful join.
> Things to consider:
>  - identify primary keys for the inputs if possible;
>  - otherwise buffer both collections, correctly discard collections prefixes on timer;



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