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  1. Core Server
  2. SERVER-63700

Make sure $lookup, lowered to NLJ in SBE, has proper semantics for empty arrays

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    • Icon: Task Task
    • Resolution: Fixed
    • Icon: Major - P3 Major - P3
    • 6.0.0-rc0
    • None
    • None
    • None
    • Fully Compatible
    • QE 2022-04-04, QE 2022-03-07, QE 2022-03-21

    Description

      The current implementation of $lookup via NLJ in SBE doesn't match the semantics in the classic engine (that is, it doesn't match terminal empty arrays to null/missing/undefined). SERVER-63368 tracks whether we'd like to change the classic semantics.

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            irina.yatsenko@mongodb.com Irina Yatsenko (Inactive)
            irina.yatsenko@mongodb.com Irina Yatsenko (Inactive)
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              Updated:
              Resolved: