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From "Matthias J. Sax (Jira)" <j...@apache.org>
Subject [jira] [Resolved] (KAFKA-9058) Foreign Key Join should not require a queriable store
Date Thu, 17 Oct 2019 18:55:00 GMT

     [ https://issues.apache.org/jira/browse/KAFKA-9058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matthias J. Sax resolved KAFKA-9058.
------------------------------------
    Fix Version/s: 2.4.0
       Resolution: Fixed

> Foreign Key Join should not require a queriable store
> -----------------------------------------------------
>
>                 Key: KAFKA-9058
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9058
>             Project: Kafka
>          Issue Type: Improvement
>    Affects Versions: 2.4.0
>            Reporter: John Roesler
>            Assignee: John Roesler
>            Priority: Blocker
>              Labels: streams
>             Fix For: 2.4.0
>
>
> While resolving KAFKA-9000, I uncovered a significant flaw in the implementation of foreign
key joins. The join only works if supplied with a queriable store. I think this was simply
an oversight during implementation and review.
> It would be better to fix this now before the release, since the restriction it places
on users could represent a significant burden. If they don't otherwise need the store to be
queriable, then they shouldn't be forced to allocate enough storage for a full copy of the
join result, or add the changelog topic for it either.



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