[teiid-issues] [JBoss JIRA] Resolved: (TEIID-1338) Add transitive join conditions across sources

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-1338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-1338.
-----------------------------------

    Resolution: Done


added additional handling in copy criteria to use join conditions from lower joins.  this allows for some interesting transitive relationships to be discovered and addresses the case given in the description.

> Add transitive join conditions across sources
> ---------------------------------------------
>
>                 Key: TEIID-1338
>                 URL: https://issues.jboss.org/browse/TEIID-1338
>             Project: Teiid
>          Issue Type: Feature Request
>          Components: Query Engine
>    Affects Versions: 7.1
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 7.3
>
>
> A situation such as 
> from a, b, c where a.x = b.x and a.x = c.x
> such that b and c are on a different source than a, it would be good to also use transitive condition b.x = c.x.

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