[GitHub] [geode] nabarunnag commented on pull request #6200: GEODE-9004: Fix issues in queries targeting a Map field

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nabarunnag commented on pull request #6200:
URL: https://github.com/apache/geode/pull/6200#issuecomment-811341260


   We had a small impromtu discussion with the query engine team and some research on how NoSQL treats null (or nil in some worlds)
   -  in MongoDB we founnd that 
   `The { item : null } query matches documents that either contain the item field whose value is null or that do not contain the item field.`
   - in redis nil is returned if the field does not exist.
   
   Hence we think that the current behavior i.e. querying without indexes is the right result and we should try to make the indexes return the same result.


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