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  1. Core Server
  2. SERVER-1012

Value-less MapReduce (distinct on steroids)

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    • Icon: New Feature New Feature
    • Resolution: Won't Fix
    • Icon: Minor - P4 Minor - P4
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    Description

      I've seen a few people using map reduce just to build a distinct list. It might be more efficient if we supported a key-only MapReduce with a single-argument emit function and no reduce phase. Whatever is emitted would just be put strait into the _id field.

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            Unassigned Unassigned
            mathias@mongodb.com Mathias Stearn
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