[teiid-issues] [JBoss JIRA] Closed: (TEIID-1508) Dependent join planning problem

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-1508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins closed TEIID-1508.
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> Dependent join planning problem
> -------------------------------
>
>                 Key: TEIID-1508
>                 URL: https://issues.jboss.org/browse/TEIID-1508
>             Project: Teiid
>          Issue Type: Quality Risk
>          Components: Query Engine
>    Affects Versions: 7.4
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 7.4
>
>
> Without a dependent join hint a composite cross source dependent join will not plan correctly unless the independent side can be pushed as a single query.  The root of the issue is that join planning involving more than 1 independent table does not consider the effect of potential dependent joins early enough. 
> The workaround is to use a dependent join hint or set the cardinality of the independent tables small enough to trigger the proper dependent join.

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