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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?.
device_id state
1 ("2021-11-11 11:11:11",foo)
2 null
device_id state
1 ("2021-12-04 15:51:24.888234",foo)
device_id state
3 null
device_id state
1 ("2021-12-04 15:51:24.888234",foo)
3 null