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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 4
| id | amount1 | amount2 | amount3 |
|---|---|---|---|
| 1 | 10 | 0 | 3 |
| 1 | 20 | 1 | 1 |
| 2 | 5 | 2 | 2 |
| 2 | 0 | 3 | 11 |
SELECT 4
| id | sum | sum | sum |
|---|---|---|---|
| 1 | 10 | 0 | 3 |
| 1 | 20 | 1 | 1 |
| 1 | 30 | 1 | 4 |
| 2 | 5 | 2 | 2 |
| 2 | 0 | 3 | 11 |
| 2 | 5 | 5 | 13 |
SELECT 6