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  1. Core Server
  2. SERVER-57860

$sampleFromRandomCursor should fallback to using a collection scan when random cursor returns too many duplicate

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Won't Do
    • None
    • None
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    • ALL
    • Query Execution 2021-07-12
    • 19

    Description

      The current logic of $sampleFromRandomCursor is to throw a uassert when the random cursor returns too many (100) duplicate records. We should instead fallback to using a collection scan in this case.

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-29446 $sample stage could not find a non-duplicate document while using a random cursor

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

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              backlog-query-execution Backlog - Query Execution
              arun.banala@mongodb.com Arun Banala
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                Updated:
                Resolved: