[GitHub] garrensmith opened a new pull request #1719: Don't use $not to validate use of index

[GitBox <gi...@apache.org>]

garrensmith opened a new pull request #1719: Don't use $not to validate use of index
URL: https://github.com/apache/couchdb/pull/1719
 
 
   ## Overview
   
   When mango is selecting an index for a query, previously it would consider a field with a $not to be 
   acceptable to validate a field and increase the chance of that index being selected. That isn't quite correct. It is better to ignore a field and condition that contains a $not. It isn't proof enough that the index is usable for the query.
   
   
   
   ## Testing recommendations
   
   All tests should pass. Queries using $not should use _all_docs unless more selectors in the query help select an index.
   
   ## Checklist
   
   - [x] Code is written and works correctly;
   - [x] Changes are covered by tests;
   - [ ] Documentation reflects the changes;
   

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