[teiid-issues] [JBoss JIRA] (TEIID-3183) Join sort order altered inappropriately

[RH Bugzilla Integration (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-3183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

RH Bugzilla Integration updated TEIID-3183:
-------------------------------------------
        Bugzilla Update: Perform
    Bugzilla References: https://bugzilla.redhat.com/show_bug.cgi?id=1155599


> Join sort order altered inappropriately
> ---------------------------------------
>
>                 Key: TEIID-3183
>                 URL: https://issues.jboss.org/browse/TEIID-3183
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: 8.4
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>            Priority: Critical
>             Fix For: 8.7.1, 8.9
>
>
> If a merge or other join configuration is chosen and there is a subquery affecting only a side of the join that is to be sorted such that the subquery can be rewritten as a semi/anti-semi join, then the subquery rewrite will alter the intended sort order of the original join.  This can result in incorrect results.
> An example query:
> select pm2.g2.e1 from pm1.g1 inner join pm2.g2 on (pm1.g1.e1 = pm2.g2.e1) where pm2.g2.e2 in /*+ mj */ (select count(e2) FROM pm1.g2 group by e1 having e1 < pm2.g2.e3)



--
This message was sent by Atlassian JIRA
(v6.3.1#6329)