Uploaded image for project: 'Teiid'
  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:
      None

      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.

        Gliffy Diagrams

          Attachments

            Activity

              People

              • Assignee:
                shawkins Steven Hawkins
                Reporter:
                shawkins Steven Hawkins
              • Votes:
                0 Vote for this issue
                Watchers:
                1 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: