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From "Fabian Hueske (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (FLINK-1628) Strange behavior of "where" function during a join
Date Tue, 10 Mar 2015 00:52:39 GMT

     [ https://issues.apache.org/jira/browse/FLINK-1628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Fabian Hueske resolved FLINK-1628.
    Resolution: Fixed

Fixed with b0a57c32fc68d4a1369e5ece25d3a6e986ee1e2a

> Strange behavior of "where" function during a join
> --------------------------------------------------
>                 Key: FLINK-1628
>                 URL: https://issues.apache.org/jira/browse/FLINK-1628
>             Project: Flink
>          Issue Type: Bug
>          Components: Optimizer
>    Affects Versions: 0.9
>            Reporter: Daniel Bali
>            Assignee: Fabian Hueske
>            Priority: Critical
>              Labels: batch
> Hello!
> If I use the `where` function with a field list during a join, it exhibits strange behavior.
> Here is the sample code that triggers the error: https://gist.github.com/balidani/d9789b713e559d867d5c
> This example joins a DataSet with itself, then counts the number of rows. If I use `.where(0,
1)` the result is (22), which is not correct. If I use `EdgeKeySelector`, I get the correct
result (101).
> When I pass a field list to the `equalTo` function (but not `where`), everything works
> If I don't include the `groupBy` and `reduceGroup` parts, everything works.
> Also, when working with large DataSets, passing a field list to `where` makes it incredibly
slow, even though I don't see any exceptions in the log (in DEBUG mode).
> Does anybody know what might cause this problem?
> Thanks!

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