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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-4913) Put deterministic ordering in the top-K ngrams output of UDF context_ngrams()
Date Sat, 10 Aug 2013 09:52:47 GMT

     [ https://issues.apache.org/jira/browse/HIVE-4913?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashutosh Chauhan updated HIVE-4913:
-----------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Committed to trunk. Thanks, Xuefu!
                
> Put deterministic ordering in the top-K ngrams output of UDF context_ngrams()
> -----------------------------------------------------------------------------
>
>                 Key: HIVE-4913
>                 URL: https://issues.apache.org/jira/browse/HIVE-4913
>             Project: Hive
>          Issue Type: Improvement
>          Components: UDF
>    Affects Versions: 0.10.0, 0.11.0
>            Reporter: Xuefu Zhang
>            Assignee: Xuefu Zhang
>            Priority: Minor
>             Fix For: 0.12.0
>
>         Attachments: HIVE-4913.patch, HIVE-4913.patch
>
>
> Currently UDF context_ngrams() output top-K ngrams in the order of descending frequency.
When there are ties, i.e., phrases with same ngram value, the order is indeterministic. Tie
breaker is needed to break the ties, so that the output is deterministic.

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