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  1. Core Server
  2. SERVER-83220

Lookup between unsplittable collections gets incorrectly pushed down to SBE

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    • Type: Icon: Bug Bug
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 8.0.0-rc0
    • Affects Version/s: None
    • Component/s: None
    • Query Execution
    • Fully Compatible
    • QE 2023-12-11, QE 2023-12-25, QE 2024-01-08, QE 2024-01-22, QE 2024-02-05, QE 2024-02-19
    • None
    • 3
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      Currently, SBE doesn't support remote reads, so we check that all involved collections are unsharded, before we do $lookup in SBE:

      https://github.com/mongodb/mongo/blob/fd12276470b4fc66c1b9d90cc8434907c8be86d6/src/mongo/db/pipeline/pipeline_d.cpp#L486

      We need to check for data colocation instead.

            Assignee:
            mihai.andrei@mongodb.com Mihai Andrei
            Reporter:
            ivan.fefer@mongodb.com Ivan Fefer
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              Created:
              Updated:
              Resolved: