Aggregation should use the output of DocumentSource::getOutputSorts() to optimize wherever possible.

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    • Type: Improvement
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Affects Version/s: None
    • Component/s: Aggregation Framework
    • Query Optimization
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      As part of SERVER-4507, a virtual method was introduced on DocumentSource, getOutputSorts, that allows the following stage to determine what, if any, sorting is present on the stream of input documents. At the moment, only $group takes advantage of this knowledge. Where possible, other stages should be expanded to take advantage of it as well. Of course, the primary example is $sort, which can do far less work if the input is already sorted by the sort key, but other possibilities may exist as well.

              Assignee:
              [DO NOT USE] Backlog - Query Optimization
              Reporter:
              Benjamin Murphy (Inactive)
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                Created:
                Updated: