[teiid-issues] [JBoss JIRA] (TEIID-4332) Enhance costing to better guess at ndv

[Steven Hawkins (JIRA)]

Steven Hawkins created TEIID-4332:
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             Summary: Enhance costing to better guess at ndv
                 Key: TEIID-4332
                 URL: https://issues.jboss.org/browse/TEIID-4332
             Project: Teiid
          Issue Type: Quality Risk
          Components: Query Engine
            Reporter: Steven Hawkins
            Assignee: Steven Hawkins
             Fix For: 9.1


Our logic for determining ndv is mostly ad hoc and varies greatly depending upon the position in the plan.  This needs to be more standardized and based upon consistent assumptions - also additional information such as predicates and foreign keys should influence the calculation.



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