[teiid-issues] [JBoss JIRA] (TEIID-5212) Additional optimization of left outer joins

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-5212?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-5212.
-----------------------------------
    Fix Version/s: 10.1
       Resolution: Done


Updated the outer join planning logic to look for additional associative scenarios that span a left outer join - rather than looking only across a single nested join.  The logic is still not entirely general as the left hand structure must be simple (where we can descend to an applicable access node).

> Additional optimization of left outer joins
> -------------------------------------------
>
>                 Key: TEIID-5212
>                 URL: https://issues.jboss.org/browse/TEIID-5212
>             Project: Teiid
>          Issue Type: Quality Risk
>          Components: Query Engine
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 10.1
>
>
> Related to TEIID-5016 and TEIID-3652, there are additional circumstances where the join planning logic can combine tables from different parts of a join tree involving left outer joins.
> The referenced forum posting has a star join against ora_ses such that moving the placement of the nested inner join allows for more grouping of the join tables.



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