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  1. Core Server
  2. SERVER-42616

$stdDev accumulator can return imprecise results when spilling to disk

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    • Query Execution
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    Description

      When merging intermediate results which have spilled to disk, the $stdDev accumulator executes the variance calculation involving some arithmetic over the previously calculated mean and . If the mean is a precise double, then this could result in precision loss.

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-37429 $avg of Infinity and null is NaN on debug builds

          • Minor - P4 - Minor loss of function, or other problem where easy workaround is present.
          • Backlog

          Task - A task that needs to be done. SERVER-37672 Re-enable agg fuzzer on debug builds

          • Major - P3 - Major loss of function.
          • Closed

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              backlog-query-execution Backlog - Query Execution
              nicholas.zolnierz@mongodb.com Nicholas Zolnierz
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                Updated: