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  1. Core Server
  2. SERVER-75416

Support $planCacheStats aggregation stage on time-series collection (sharded and unsharded)

    • Type: Icon: Bug Bug
    • Resolution: Unresolved
    • Priority: Icon: Major - P3 Major - P3
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    • Affects Version/s: None
    • Component/s: None
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    • Query Execution

      Running coll.aggregate([\{$planCacheStats: {}}]) on a time-series collection will fail with
      "$planCacheStats is only valid as the first stage in a pipeline".
       
      In case of time-series pipelines, $_internalUnpackBucket is the first stage. We need special handling for stages with constraints on pipeline position like the following for $indexStats. https://github.com/10gen/mongo/blob/master/src/mongo/db/views/resolved_view.cpp/#L137-L161

            Assignee:
            backlog-query-execution [DO NOT USE] Backlog - Query Execution
            Reporter:
            adi.agrawal@mongodb.com Adi Agrawal
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              Created:
              Updated: