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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?.
CREATE TABLE
INSERT 0 5
id value
1 {friend,apple,cat}
2 {cat,friend,dog}
SELECT 2
id value
1 {friend,apple,cat}
2 {cat,friend,dog}
4 {wildcat,potato,alices-friend}
SELECT 3
id value
2 {cat,friend,dog}
5 {friend1,friend2,no_tigers}
4 {wildcat,potato,alices-friend}
1 {friend,apple,cat}
SELECT 4