[Join Optimization] Investigate TPC-H Q9 choice to use INLJ probe into lineitem

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    • Type: Task
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Query Optimization
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      After SERVER-122314, our plan stability tests began choosing an index probe into lineitem causing an order of magnitude regression in the number of keys scanned in the chosen plan (see https://github.com/10gen/mongo/pull/49667 and plan stability test).

      What is interesting is that as a result of the change, we started choosing the optimal P-PS-S-N-L-O order, but a suboptimal join algorithm choice.

            Assignee:
            Unassigned
            Reporter:
            Ben Shteinfeld
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              Created:
              Updated: