]
Work on TEIID-4332 started by Steven Hawkins.
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Enhance costing to better guess at ndv
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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.