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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4913) Put deterministic ordering in the top-K ngrams output of UDF context_ngrams()
Date Fri, 09 Aug 2013 03:54:47 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13734370#comment-13734370
] 

Hive QA commented on HIVE-4913:
-------------------------------



{color:red}Overall{color}: -1 at least one tests failed

Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12596911/HIVE-4913.patch

{color:red}ERROR:{color} -1 due to 2 failed/errored test(s), 2772 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestMinimrCliDriver.testCliDriver_bucket_num_reducers
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_ppd_vc
{noformat}

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/349/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/349/console

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests failed with: TestsFailedException: 2 tests failed
{noformat}

This message is automatically generated.
                
> 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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