[SERVER-14617] Cardinality Histogram for Query Planner Created: 18/Jul/14  Updated: 01/Oct/15  Resolved: 01/Oct/15

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

Type: Improvement Priority: Major - P3
Reporter: Osmar Olivo Assignee: Unassigned
Resolution: Duplicate Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Duplicate
duplicates SERVER-20619 Statistics-based query optimization Backlog
Participants:

 Description   

Cardinality Histogram for indexes, similar to what a lot of relational databases have.

This will allow for the query planner to more intelligently decide when it is optimal to use certain indexes over others on a per query basis (Not simply based off a cached value that might be a one off). This will allow for more effective use of index intersection, indexes, and tablescans (where appropriate)



 Comments   
Comment by David Storch [ 01/Oct/15 ]

Resolving as a duplicate of SERVER-20619, since the newer ticket is slightly more general.

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