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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-1032) Extend POJO Field Selectors to Support Accessing Nested Objects
Date Sun, 05 Oct 2014 14:43:33 GMT

    [ https://issues.apache.org/jira/browse/FLINK-1032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14159542#comment-14159542
] 

ASF GitHub Bot commented on FLINK-1032:
---------------------------------------

Github user StephanEwen commented on a diff in the pull request:

    https://github.com/apache/incubator-flink/pull/141#discussion_r18435533
  
    --- Diff: flink-compiler/src/test/java/org/apache/flink/compiler/WorksetIterationsJavaApiCompilerTest.java
---
    @@ -78,7 +78,7 @@ public void testJavaApiWithDeferredSoltionSetUpdateWithMapper() {
     			// verify joinWithSolutionSet
     			assertEquals(ShipStrategyType.PARTITION_HASH, joinWithSolutionSetNode.getInput1().getShipStrategy());
     			assertEquals(ShipStrategyType.FORWARD, joinWithSolutionSetNode.getInput2().getShipStrategy());
    -			assertEquals(new FieldList(0, 1), joinWithSolutionSetNode.getKeysForInput1());
    --- End diff --
    
    Does this indicate that you found and fixed another bug on the way (screwing up fields
orders through the sorting?)


> Extend POJO Field Selectors to Support Accessing Nested Objects
> ---------------------------------------------------------------
>
>                 Key: FLINK-1032
>                 URL: https://issues.apache.org/jira/browse/FLINK-1032
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Java API
>            Reporter: Aljoscha Krettek
>            Assignee: Robert Metzger
>
> Right now you can only use fields of the top-level object as key fields in groupings,
joins, and co-group. This should be extended to allow using nested fields. We have to be careful
with null fields, though.



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