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  1. Core Server
  2. SERVER-38138

$expr doesn't use indexes

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    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Duplicate
    • 4.0.4
    • None
    • None
    • None

    Description

      $expr doesn't use indexes at all with any expression, except with $eq and this happened after it was issued https://jira.mongodb.org/browse/SERVER-33364

      My issue specifically with $in, neither in $lookup nor in find() it uses indexes even on _id field

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              daniel.hatcher@mongodb.com Danny Hatcher (Inactive)
              hawkkero6000@gmail.com Hawk Kero
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                Updated:
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