[teiid-issues] [JBoss JIRA] (TEIID-5783) OUTER JOIN yields wrong results when used with GROUP BY, CASE and COUNT DISTINCT

[Dmitrii Pogorelov (Jira)]

     [ https://issues.jboss.org/browse/TEIID-5783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dmitrii Pogorelov updated TEIID-5783:
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    Summary: OUTER JOIN yields wrong results when used with GROUP BY, CASE and COUNT DISTINCT  (was: OUTER JOIN Yields Wrong Results When Used With GROUP BY, CASE and COUNT DISTINCT)


> OUTER JOIN yields wrong results when used with GROUP BY, CASE and COUNT DISTINCT
> --------------------------------------------------------------------------------
>
>                 Key: TEIID-5783
>                 URL: https://issues.jboss.org/browse/TEIID-5783
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 12.0
>         Environment: teiid-12.0.0 on WildFly Full 14.0.1.Final (WildFly Core 6.0.2.Final)
>            Reporter: Dmitrii Pogorelov
>            Assignee: Steven Hawkins
>            Priority: Blocker
>         Attachments: test1.csv, test2.csv
>
>
> Some queries that involve an OUTER JOIN between objects from different data sources, a GROUP BY with a CASE statement and a COUNT DISTINCT yield inconsistent results on a SELECT expression which is identical to the GROUP BY expression with CASE.
> * Reproduced in combination of <File> LEFT JOIN <MySQL> and <File> LEFT JOIN <MS SQL> and the same for the other OUTER JOIN variants.
> * screenshot for the different queries are attached
> * sample data for reproduction is attached
> The same problem happens with LEFT OUTER JOIN, RIGHT OUTER JOIN and FULL OUTER JOIN.



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