[GitHub] willholley opened a new pull request #768: basic execution statistics for _find

[gi...@git.apache.org]

willholley opened a new pull request #768: basic execution statistics for _find
URL: https://github.com/apache/couchdb/pull/768
 
 
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   ## Overview
   
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        what problem it solves or how it makes things better. -->
   
   Accept an "execution_stats" parameter to _find. If present, return a new "execution_stats" object in the response which contains information about the query executed. Currently, this is only
   implemented for json/all_docs indexes and contains:
   
    * total key lookups
    * total document lookups (when include_docs=true used)
    * total quorum document lookups (when fabric doc lookups used)
   
   ## Testing recommendations
   
   <!-- Describe how we can test your changes.
        Does it provides any behaviour that the end users
        could notice? -->
   Query `_find` with different selectors. Add `"execution_stats":true` to the request body and see that an `"execution_stats"` field is returned. Test with different index types.
   
   This PR adds new unit tests for the execution stats and existing behaviour is already well covered by tests.
   
   ## GitHub issue number
   
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        and include the number here and in commit message(s) using
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   ## Related Pull Requests
   
   <!-- If your changes affects multiple components in different
        repositories please put links to those pull requests here.  -->
   
   ## Checklist
   
   - [ ] Code is written and works correctly;
   - [ ] Changes are covered by tests;
   - [ ] Documentation reflects the changes;
   
 
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