[PBT] Extend $sort+$group and $group with accumulator functions test coverage.

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    • Type: Task
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Query Optimization
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      In particular want to cover cases when a distinct scan optimization can be applied wrongly. This optimization is possible when $group groups on the prefix of an existing index and the accumulator functions specifies sorting on some of the remaining fields of the index. 

      See SERVER-110803 for some examples.

            Assignee:
            Unassigned
            Reporter:
            Alexander Ignatyev
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              Created:
              Updated: