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

[Steven Hawkins (JIRA)]

Steven Hawkins created TEIID-3183:
-------------------------------------

             Summary: 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)