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  1. Teiid
  2. TEIID-4332

Enhance costing to better guess at ndv

    Details

    • Type: Quality Risk
    • Status: Resolved (View Workflow)
    • Priority: Major
    • Resolution: Done
    • Affects Version/s: None
    • Fix Version/s: 9.1
    • Component/s: Query Engine
    • Labels:
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      Description

      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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                • Assignee:
                  shawkins Steven Hawkins
                  Reporter:
                  shawkins Steven Hawkins
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                  • Created:
                    Updated:
                    Resolved: