add aggregation stage $countBy which is equivalent to group with sum

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    • Type: Improvement
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Affects Version/s: None
    • Component/s: Aggregation Framework
    • Query Optimization
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      It would be nice to have syntactic sugar for the following stage which I type all the time:

      {$group:{_id:"$field", count:{$sum:1}}}

      Something like {$countBy:"$field"} would be more readable and be analogous to $count and $sortByCount stages (and would use same field names as sortByCount - i.e. count field for sum)

              Assignee:
              [DO NOT USE] Backlog - Query Optimization
              Reporter:
              Asya Kamsky
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                Created:
                Updated: