[jira] [Commented] (HIVE-6027) non-vectorized log10 has rounding issue

["Hive QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-6027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13846996#comment-13846996 ] 

Hive QA commented on HIVE-6027:
-------------------------------



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

Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12618494/HIVE-6027.patch

{color:green}SUCCESS:{color} +1 4779 tests passed

Test results: http://bigtop01.cloudera.org:8080/job/PreCommit-HIVE-Build/625/testReport
Console output: http://bigtop01.cloudera.org:8080/job/PreCommit-HIVE-Build/625/console

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: 12618494

> non-vectorized log10 has rounding issue
> ---------------------------------------
>
>                 Key: HIVE-6027
>                 URL: https://issues.apache.org/jira/browse/HIVE-6027
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Trivial
>         Attachments: HIVE-6027.patch
>
>
> In HIVE-6010, I found that vectorized and non-vectorized log10 may produce different results in the last digit of the mantissa (e.g. 7 vs 8). It turns out that vectorized one uses Math.log10, but non-vectorized uses log/log(10). Both should use Math.log10.



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