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  1. Core Server
  2. SERVER-13298

distinct doesn't use index to distinct multikey dotted fields

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • 2.4.10, 2.6.3, 3.0.14, 3.2.10, 3.5.13
    • 4.1.10
    • Index Maintenance
    • Fully Compatible
    • ALL
    • v4.0, v3.6
    • Query 2019-03-11, Query 2019-03-25, Query 2019-04-08

    Description

      Had a compound index on

      { "lineitems.returnflag":1, "lineitems.linestatus":1 }
      


      where lineitems is an array.

      Did db.orders.distinct("lineitems.returnflag") which caused a collection scan.

      Non-multikey correctly used the index.

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              ian.boros@mongodb.com Ian Boros
              asya.kamsky@mongodb.com Asya Kamsky
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              Dates

                Created:
                Updated:
                Resolved: