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  1. Core Server
  2. SERVER-57554

Support outer join in SBE HashJoin stage

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    Details

    • Type: Task
    • Status: Open
    • Priority: Major - P3
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: Backlog
    • Component/s: None
    • Labels:
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      Description

      Currently the SBE hash join operator always uses the 'outer' side as the 'build' side. For the $group/$lookup project, the right(inner) side of $lookup will always be the build side. Since $lookup performs a left-outer join, we will have to flip the join sides. We must make HashJoin support right outer joins.

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            Assignee:
            backlog-query-execution Backlog - Query Execution
            Reporter:
            ian.boros Ian Boros
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              Created:
              Updated: