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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?.
9 rows affected
pname in1 unnest
a 1 1
b 2 2
b 2 3
c 4 4
c 4 5
c 4 6
d 7 7
d 7 8
d 7 9
d 7 10
e 11 11
f 12 12
g null null
g null 666
h null null
i null null