[teiid-issues] [JBoss JIRA] (TEIID-4885) Costing issues

[Steven Hawkins (JIRA)]

Steven Hawkins created TEIID-4885:
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             Summary: Costing issues
                 Key: TEIID-4885
                 URL: https://issues.jboss.org/browse/TEIID-4885
             Project: Teiid
          Issue Type: Quality Risk
          Components: Query Engine
            Reporter: Steven Hawkins
            Assignee: Steven Hawkins
             Fix For: 9.3


There were several deficiencies introduced with TEIID-4332 -

In some circumstances very low ndv values on the large side of a join would cause a dependent join in an unexpected direction.

The row estimate derived for a join without ndv information would tend to be too low, which would have a cumulative effect through further joins.  



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