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  1. Core Server
  2. SERVER-60781

$topN results not returned in order according to sort spec

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    Details

    • Type: Task
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 5.2.0
    • Component/s: None
    • Labels:
      None
    • Backwards Compatibility:
      Fully Compatible
    • Sprint:
      QE 2021-11-01

      Description

      With the current implementation $bottomN returns results in the order you would get by using a $sort stage with the same sort spec, but $topN does not. $topN currently returns results in the order opposite of the sort spec, e.g. {a: 1} currently returns the largest $a first whereas a $sort stage would return the smallest $a first.

      Pending on going discussion of result ordering in the Exact Top N Accumulator project, we should update AccumulatorTopBottomN to reflect that decision and change all the tests.

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            Assignee:
            mihai.andrei Mihai Andrei
            Reporter:
            mickey.winters Mickey Winters
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              Updated:
              Resolved: