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  1. Core Server
  2. SERVER-84537

Use constant $sum optimization outside of $group

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    • Type: Icon: Improvement Improvement
    • Resolution: Unresolved
    • Priority: Icon: Major - P3 Major - P3
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    • Affects Version/s: None
    • Component/s: None
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    • Query Execution

      Following SERVER-77203 and SERVER-65465, $sum over a constant will use a simple sum instead of a DoubleDoubleSummation to track the sum in both classic and SBE. However, this optimization is only used in $group. This ticket tracks the work to use this optimization in other places, including: 

      • Window functions 
      • $bucketAuto (which default constructs a $sum accumulator, and does not use this optimization)
      • Anywhere that we default construct AccumulatorSum

            Assignee:
            projjal.chanda@mongodb.com Projjal Chanda
            Reporter:
            mihai.andrei@mongodb.com Mihai Andrei
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              Created:
              Updated: