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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?.
12 rows affected
| um_no | nums | hour | day |
|---|---|---|---|
| mary | 3 | 8 | 1 |
| john | 6 | 8 | 1 |
| peter | 2 | 8 | 1 |
| jason | 1 | 8 | 1 |
| mary | 5 | 9 | 1 |
| john | 6 | 9 | 1 |
| peter | 6 | 9 | 1 |
| jason | 1 | 9 | 1 |
| mary | 5 | 10 | 1 |
| john | 4 | 10 | 1 |
| peter | 2 | 10 | 1 |
| jason | 4 | 10 | 1 |
| day | hour | nums0_5 | nums5_10 | nums10_15 | nums15up |
|---|---|---|---|---|---|
| 1 | 8 | 3 | 1 | 0 | 0 |
| 1 | 9 | 1 | 2 | 1 | 0 |
| 1 | 10 | 0 | 2 | 2 | 1 |