Persist compound NDV stats in analyze path

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    • Type: Task
    • Resolution: Fixed
    • Priority: Major - P3
    • 9.1.0-rc0
    • Affects Version/s: None
    • Component/s: None
    • Query Optimization
    • Fully Compatible
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      • Extend the $_internalConstructNdvSketch accumulator to scan multiple fields at the same time
      • Concatenation & hashing of compound KeyStrings
      • Construction of _id field for composite NDV (concatenate field paths)
      • Persist (n + 1) sketches to correctly handle $expr/$eq semantics at read time

            Assignee:
            Aaron Schüttpelz
            Reporter:
            Max Verbinnen
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              Created:
              Updated:
              Resolved: