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https://issues.apache.org/jira/browse/PHOENIX-5065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17055512#comment-17055512
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Hadoop QA commented on PHOENIX-5065:
------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment 
  
http://issues.apache.org/jira/secure/attachment/12996226/PHOENIX-5065.master.v5.patch
  against master branch at commit 6a2ad3ed4517ff23e0e5dff3f364c1c0673b8efc.
  ATTACHMENT ID: 12996226

    {color:green}+1 @author{color}.  The patch does not contain any @author 
tags.

    {color:green}+1 tests included{color}.  The patch appears to include 4 new 
or modified tests.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines 
longer than 100

     {color:red}-1 core tests{color}.  The patch failed these unit tests:
     
./phoenix-core/target/failsafe-reports/TEST-org.apache.phoenix.end2end.join.HashJoinNoIndexIT
./phoenix-core/target/failsafe-reports/TEST-org.apache.phoenix.end2end.UpsertSelectAutoCommitIT

Test results: 
https://builds.apache.org/job/PreCommit-PHOENIX-Build/3558//testReport/
Console output: 
https://builds.apache.org/job/PreCommit-PHOENIX-Build/3558//console

This message is automatically generated.

> Inconsistent treatment of NULL and empty string
> -----------------------------------------------
>
>                 Key: PHOENIX-5065
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-5065
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.14.1
>            Reporter: Geoffrey Jacoby
>            Priority: Major
>         Attachments: PHOENIX-5065.master.v1.patch, 
> PHOENIX-5065.master.v2.patch, PHOENIX-5065.master.v3.patch, 
> PHOENIX-5065.master.v4.patch, PHOENIX-5065.master.v5.patch
>
>
> Phoenix doesn't handle NULLs consistently with other SQL dialects, and it 
> doesn't handle them consistently internally either. 
> In PHOENIX-2422, [~jamestaylor] mentioned that Phoenix's intended behavior is 
> for empty string and NULL to be equivalent. That's inconsistent with other 
> SQL dialects (in which NULL is never equal to anything, including itself), 
> but if that's our documented behavior, then that's fine unless PHOENIX-2422 
> to change it is ever worked. 
> But consider the following queries:
> {code:java}
> SELECT COUNT(*) FROM SYSTEM.CATALOG WHERE TENANT_ID = '';
> -- Returns 0 rows
> SELECT COUNT(*) FROM SYSTEM.CATALOG WHERE TENANT_ID IS NULL;
> -- Returns some number of rows. Call it N
> SELECT COUNT(*) FROM SYSTEM.CATALOG WHERE TENANT_ID IN ('');
> -- Returns 0 rows
> SELECT COUNT(*) FROM SYSTEM.CATALOG WHERE TENANT_ID IN ('', 'FOO');
> -- Returns N rows. Note that FOO does not exist, and is just a nonsense string
> SELECT COUNT(*) FROM SYSTEM.CATALOG WHERE TENANT_ID = '' OR TENANT_ID = 'FOO'
> --Returns 0 rows, but slowly
> {code}



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