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https://issues.apache.org/jira/browse/HIVE-3972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13963766#comment-13963766
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Brock Noland commented on HIVE-3972:
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Looks like the .out file contains a ^A or something:
diff --git ql/src/test/results/clientpositive/orderby_query_bucketing.q.out
ql/src/test/results/clientpositive/orderby_query_bucketing.q.out
new file mode 100644
index 0000000..c02b1c9
Binary files /dev/null and
ql/src/test/results/clientpositive/orderby_query_bucketing.q.out differ
> Support using multiple reducer for fetching order by results
> ------------------------------------------------------------
>
> Key: HIVE-3972
> URL: https://issues.apache.org/jira/browse/HIVE-3972
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Minor
> Attachments: D8349.5.patch, D8349.6.patch, D8349.7.patch,
> HIVE-3972.8.patch.txt, HIVE-3972.9.patch.txt, HIVE-3972.D8349.1.patch,
> HIVE-3972.D8349.2.patch, HIVE-3972.D8349.3.patch, HIVE-3972.D8349.4.patch
>
>
> Queries for fetching results which have lastly "order by" clause make final
> MR run with single reducer, which can be too much. For example,
> {code}
> select value, sum(key) as sum from src group by value order by sum;
> {code}
> If number of reducer is reasonable, multiple result files could be merged
> into single sorted stream in the fetcher level.
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