[SERVER-5105] explain does not load full documents if unnecessary for matching Created: 27/Feb/12  Updated: 15/Aug/12  Resolved: 27/Feb/12

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

Type: Improvement Priority: Major - P3
Reporter: Aaron Staple Assignee: Unassigned
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Participants:

 Description   

If a match can be done with the index only, explain does not read the full document. This is in contrast to a normal query, which generally reads the full document unless a covered index query is being performed. This discrepancy can result in the explain query running much faster than a corresponding normal query in some cases.



 Comments   
Comment by Eliot Horowitz (Inactive) [ 27/Feb/12 ]

this is as we want it.
there is a discrepency, but as long as nscannedObject is correct, its good

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