[teiid-issues] [JBoss JIRA] (TEIID-5783) OUTER JOIN yields wrong results when used with GROUP BY, CASE and COUNT DISTINCT
Steven Hawkins (Jira)
issues at jboss.org
Mon Jun 24 13:04:00 EDT 2019
[ https://issues.jboss.org/browse/TEIID-5783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Work on TEIID-5783 started by Steven Hawkins.
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> 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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