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Posted to dev@hive.apache.org by "Gunther Hagleitner (JIRA)" <ji...@apache.org> on 2014/02/01 03:00:12 UTC

[jira] [Created] (HIVE-6348) Order by/Sort by in subquery

Gunther Hagleitner created HIVE-6348:
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             Summary: Order by/Sort by in subquery
                 Key: HIVE-6348
                 URL: https://issues.apache.org/jira/browse/HIVE-6348
             Project: Hive
          Issue Type: Bug
            Reporter: Gunther Hagleitner
            Priority: Minor


select * from (select * from foo order by c asc) bar order by c desc;

in hive sorts the data set twice. The optimizer should probably remove any order by/sort by in the sub query unless you use 'limit '. Could even go so far as barring it at the semantic level.





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