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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?.
| val | val |
|---|---|
| 1 | 6 |
| 2 | 7 |
| 3 | 8 |
| 4 | 9 |
| 5 | 10 |
| 11 | 66 |
| 22 | 77 |
| 33 | 88 |
| 44 | 99 |
| 55 | 1010 |
SELECT 10