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https://issues.apache.org/jira/browse/FLINK-1628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14349652#comment-14349652
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ASF GitHub Bot commented on FLINK-1628:
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GitHub user fhueske opened a pull request:
https://github.com/apache/flink/pull/458
[FLINK-1628] Fix partitioning properties for Joins and CoGroups.
Fix partitioning properties for Joins and CoGroups and some smaller bugs on
the way.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/fhueske/flink joinCompilerBug
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/458.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #458
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commit 89c3bd0b76c1b4ace58e93571b361cdc0af2cbd6
Author: Fabian Hueske <fhue...@apache.org>
Date: 2015-03-04T17:49:22Z
[FLINK-1628] Fix partitioning properties for Joins and CoGroups.
----
> 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 again.
> 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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