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  1. Core Server
  2. SERVER-5361

early $group should provide a hint to use an index matching the group key

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Duplicate
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Aggregation Framework
    • Labels:
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      Description

      For an example query that could use this (assuming the appropriate index is there), see https://groups.google.com/forum/#!msg/mongodb-user/V5nO8gkgzbk/iI9F_faNPFsJ .

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