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From "Gianmarco De Francisci Morales (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-2975) TestTypedMap.testOrderBy failing with incorrect result
Date Fri, 19 Oct 2012 21:10:13 GMT

    [ https://issues.apache.org/jira/browse/PIG-2975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480393#comment-13480393
] 

Gianmarco De Francisci Morales commented on PIG-2975:
-----------------------------------------------------

Indeed, my idea to keep the order stable is only a "nice to have".
For sure there is no strict requirement to keep it, so I am OK with foregoing it and directly
comparing the whole bytes.

Koji, that's a good question. I guess that it could happen if we lose the schema during the
execution of a plan, e.g. because of a UDF.
                
> TestTypedMap.testOrderBy failing with incorrect result 
> -------------------------------------------------------
>
>                 Key: PIG-2975
>                 URL: https://issues.apache.org/jira/browse/PIG-2975
>             Project: Pig
>          Issue Type: Sub-task
>    Affects Versions: 0.11
>            Reporter: Koji Noguchi
>            Assignee: Koji Noguchi
>            Priority: Blocker
>             Fix For: 0.11
>
>         Attachments: PIG-2975-0_jco.patch, PIG-2975-0_jco-v2.patch, pig-2975-trunk_v01.txt,
pig-2975-trunk_v02-broken.txt, pig-2975-trunk_v03-unionapproach.txt, pig-2975-trunk_v04-purerawcompare.txt
>
>
> Looked at 
> {noformat}
> junit.framework.AssertionFailedError
>     at org.apache.pig.test.TestTypedMap.testOrderBy(TestTypedMap.java:352)
> {noformat}
> This looks like a valid test case failing with incorrect result.
> {noformat}
> % cat test/orderby.txt
> [key#1,key9#23]
> [key#3,key3#2]
> [key#22]
> % cat test/orderby.pig
> a = load 'test/orderby.txt' as (m:[]);
> b = foreach a generate m#'key' as b0;
> dump b;
> c = order b by b0;
> dump c;
> % java ... org.apache.pig.Main    -x local test/orderby.pig 
> [dump b]
> (1)
> (3)
> (22)
> ...
> [dump c]
> (1)
> (1)
> (22)
> %
> where did the '(3)' go?
> {noformat}

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