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https://issues.apache.org/jira/browse/PIG-2975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13480296#comment-13480296
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Koji Noguchi commented on PIG-2975:
-----------------------------------
Forgot to mention one more alternative. Take out the 4 bytes offset and just
compare everything including the meta/header. This would work but it'll mess up
the byte order completely. Until now, at least bytearray less than 256 bytes
has been alphabetically ordered.
Also, tested my last patch and it gave about 7 minutes 30 seconds. I was
expecting closer to the trunk but something is slowing it down a bit.
So, here's my understanding.
||patch ||correctness||byte order||speed||space||
|current | X | OX | O | O |
|BinInterSedesRawComparator| O | O | X | O |
|union approach | O | O | OX | X |
|no 4 bytes offset compare | O | X | O | O |
> 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
>
>
> 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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