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Help with an interesting Postgres question: Why isn't an Index Only Scan used on a partition accessed via the parent table?.
n lfd_prod lfd_prod_int
1 1 1
2 2 2
3 6 6
4 24 24
5 120 120
6 720 720
7 5040 5040
8 40320 40320
9 362880 362880
10 3628800.00000001 3628800