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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?.
| raw | canonicalized | lower | lower_inc | upper | upper_inc |
|---|---|---|---|---|---|
| (2023-01-01, 2023-01-31) | [2023-01-02,2023-01-31) | 2023-01-02 | t | 2023-01-31 | f |
| (2023-01-01, 2023-01-31] | [2023-01-02,2023-02-01) | 2023-01-02 | t | 2023-02-01 | f |
| [2023-01-01, 2023-01-31) | [2023-01-01,2023-01-31) | 2023-01-01 | t | 2023-01-31 | f |
| [2023-01-01, 2023-01-31] | [2023-01-01,2023-02-01) | 2023-01-01 | t | 2023-02-01 | f |
SELECT 4