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https://issues.apache.org/jira/browse/HIVE-15517?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pengcheng Xiong updated HIVE-15517:
-----------------------------------
Affects Version/s: 2.0.0
2.1.0
> NOT (x <=> y) returns NULL if x or y is NULL
> --------------------------------------------
>
> Key: HIVE-15517
> URL: https://issues.apache.org/jira/browse/HIVE-15517
> Project: Hive
> Issue Type: Bug
> Components: Hive, Operators, Query Processor, SQL
> Affects Versions: 1.2.1, 2.0.0, 2.1.0
> Reporter: Alexey Bedrintsev
> Assignee: Pengcheng Xiong
> Fix For: 2.2.0
>
> Attachments: HIVE-15517.01.patch
>
>
> I created a table as following:
> create table test(x string, y string);
> insert into test values ('q', 'q'), ('q', 'w'), (NULL, 'q'), ('q', NULL),
> (NULL, NULL);
> Then I try to compare values taking NULLs into account:
> select *, x<=>y, not (x<=> y), (x <=> y) = false from test;
> OK
> q q true false false
> q w false true true
> q NULL false NULL true
> NULL q false NULL true
> NULL NULL true NULL false
> I expected that 4th column will be the same as 5th one but actually got NULL
> as result of "not false" and "not true" expressions.
> Hive 1.2.1000.2.5.0.0-1245
> Subversion
> git://c66-slave-20176e25-3/grid/0/jenkins/workspace/HDP-parallel-centos6/SOURCES/hive
> -r da6c690d384d1666f5a5f450be5cbc54e2fe4bd6
> Compiled by jenkins on Fri Aug 26 01:39:52 UTC 2016
> From source with checksum c30648316a632f7a753f4359e5c8f4d6
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