Modify create_document_results_and_metadata() host service to accept DPL callback

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    • Type: Sub-task
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Affects Version/s: None
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    • Query Integration
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      The M1 version of create_document_results_and_metadata() intentionally deferred DPL callback support to M2. For sharded execution, the design calls for the host service to accept a callback that can return:

      • the document-results merge sort pattern
      • the metadata merge pipeline
      • callback-owned state and cleanup hooks

      The API shape for M2 should look like:

      typedef MongoExtensionStatus* (*MongoExtensionDocResultsDPLCallback)(
    void* userData,
    MongoExtensionByteBuf** docSortPatternOut,
    MongoExtensionByteBuf** metadataMergePipelineOut);

MongoExtensionStatus* (*create_document_results_and_metadata)(
    MongoExtensionByteView bsonSpec,
    MongoExtensionByteView metadataVarName,
    MongoExtensionDocResultsDPLCallback dplCallback,
    void* dplCallbackUserData,
    void (*dplCallbackDestroy)(void*),
    MongoExtensionAggStageAstNode** node);

            Assignee:
            Josh Siegel
            Reporter:
            Josh Siegel
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              Created:
              Updated: