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  1. Core Server
  2. SERVER-54822

Push $sort before $unwind when possible

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Details

    • Icon: Improvement Improvement
    • Resolution: Fixed
    • Icon: Major - P3 Major - P3
    • 5.1.0-rc0
    • 4.4.4
    • None
    • Fully Compatible
    • Query Optimization 2021-05-17, Query Optimization 2021-05-31, Query Optimization 2021-06-14, Query Optimization 2021-06-28

    Description

      $sort should be pushed automatically before $unwind if sort is happening on a different field.
      E.g.

      db.foo.aggregation([{$unwind: "fieldA"},{$sort: { fieldB: 1}}])
      

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            militsa.sotirova@mongodb.com Militsa Sotirova
            renato.riccio@mongodb.com Renato Riccio
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              Created:
              Updated:
              Resolved: