[SERVER-1012] Value-less MapReduce (distinct on steroids) Created: 13/Apr/10  Updated: 29/Aug/11  Resolved: 29/Aug/11

Status: Closed
Project: Core Server
Component/s: Usability
Affects Version/s: None
Fix Version/s: None

Type: New Feature Priority: Minor - P4
Reporter: Mathias Stearn Assignee: Unassigned
Resolution: Won't Fix Votes: 3
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Participants:

 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.



 Comments   
Comment by Eliot Horowitz (Inactive) [ 29/Aug/11 ]

The other things we have planned probably handle this better.

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