[teiid-issues] [JBoss JIRA] (TEIID-3866) with clause used by subquery repeated in the subquery

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-3866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-3866.
-----------------------------------
    Resolution: Done


Added logic to remove the redundant with clauses from the subqueries.

> with clause used by subquery repeated in the subquery
> -----------------------------------------------------
>
>                 Key: TEIID-3866
>                 URL: https://issues.jboss.org/browse/TEIID-3866
>             Project: Teiid
>          Issue Type: Quality Risk
>          Components: Query Engine
>    Affects Versions: 8.7
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>             Fix For: 8.13, 8.12.4
>
>
> A query such as:
> with eee as (select * from pm1.g1) select * from pm1.g2 where pm1.g2.e1 in (select e1 from eee)
> will result in a push down that repeats the with clause in the subquery:
> ... (with eee ... select e1 from eee)
> It is sufficient to rely on the parent to define the common table.



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