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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9858) Create cbrt (cube root) UDF
Date Tue, 10 Mar 2015 07:19:39 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14354453#comment-14354453
] 

Hive QA commented on HIVE-9858:
-------------------------------



{color:green}Overall{color}: +1 all checks pass

Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12703570/HIVE-9858.2.patch

{color:green}SUCCESS:{color} +1 7615 tests passed

Test results: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/2986/testReport
Console output: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/2986/console
Test logs: http://ec2-174-129-184-35.compute-1.amazonaws.com/logs/PreCommit-HIVE-TRUNK-Build-2986/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12703570 - PreCommit-HIVE-TRUNK-Build

> Create cbrt (cube root) UDF
> ---------------------------
>
>                 Key: HIVE-9858
>                 URL: https://issues.apache.org/jira/browse/HIVE-9858
>             Project: Hive
>          Issue Type: Improvement
>          Components: UDF
>            Reporter: Alexander Pivovarov
>            Assignee: Alexander Pivovarov
>         Attachments: HIVE-9858.1.patch, HIVE-9858.1.patch, HIVE-9858.2.patch
>
>
> returns the cube root of a double value
> cbrt(double a) : double
> For example:
> {code}
> select cbrt(87860583272930481.0);
> OK
> 444561.0
> {code}
> I noticed that Math.pow(a, 1.0/3.0) and hive power UDF return 444560.99999999965 for
the example above.
> However Math.cbrt returns 444561.0
> This is why we should have hive cbrt function in hive



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