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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13942) Correctness of CASE folding in the presence of NULL values
Date Sun, 05 Jun 2016 19:09:59 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15315985#comment-15315985
] 

Hive QA commented on HIVE-13942:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12808042/HIVE-13942.patch

{color:red}ERROR:{color} -1 due to build exiting with an error

Test results: http://ec2-54-177-240-2.us-west-1.compute.amazonaws.com/job/PreCommit-HIVE-MASTER-Build/537/testReport
Console output: http://ec2-54-177-240-2.us-west-1.compute.amazonaws.com/job/PreCommit-HIVE-MASTER-Build/537/console
Test logs: http://ec2-50-18-27-0.us-west-1.compute.amazonaws.com/logs/PreCommit-HIVE-MASTER-Build-537/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Tests exited with: InterruptedException: null
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12808042 - PreCommit-HIVE-MASTER-Build

> Correctness of CASE folding in the presence of NULL values
> ----------------------------------------------------------
>
>                 Key: HIVE-13942
>                 URL: https://issues.apache.org/jira/browse/HIVE-13942
>             Project: Hive
>          Issue Type: Sub-task
>          Components: CBO
>    Affects Versions: 2.2.0, 2.1.1
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>         Attachments: HIVE-13942.patch
>
>
> Introduced in HIVE-13068.
> {{(case when key<'90' then 2 else 4 end) > 3}} should not fold to {{key >= '90'}},
as these two expressions are not equivalent (consider _null_ values). Instead, it should fold
to {{not NVL((key < '90'),false)}}.
> This is caused by 1) some methods still calling original _RexUtil.simplify_ method where
the bug was originally present, and 2) further improvements needed in _HiveRexUtil.simplify_.



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