[teiid-issues] [JBoss JIRA] (TEIID-5569) Subquery unnesting with aggregates

[Steven Hawkins (Jira)]

Steven Hawkins created TEIID-5569:
-------------------------------------

             Summary: Subquery unnesting with aggregates
                 Key: TEIID-5569
                 URL: https://issues.jboss.org/browse/TEIID-5569
             Project: Teiid
          Issue Type: Bug
          Components: Query Engine
            Reporter: Steven Hawkins
            Assignee: Steven Hawkins
             Fix For: 12.0


A query such as:

{code}
SELECT pm1.g1.e1, pm1.g1.e2, /*+ MJ */ (select count(*) from pm1.g2 where e1 = pm1.g1.e1) FROM pm1.g1
{code}

Where the subquery contains aggregates without a group by will produce a join plan such that a group by is added to account for the projection of the e1 value for the join predicate.  However that will change the value from 0 to null for counts from pm1.g2 where there are no matching rows.



--
This message was sent by Atlassian Jira
(v7.12.1#712002)