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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?.
| product | product_type | price | weight |
|---|---|---|---|
| 1 | A | 20 | 0.28571428571428571429 |
| 2 | A | 20 | 0.28571428571428571429 |
| 3 | A | 30 | 0.42857142857142857143 |
| 4 | B | 30 | 1.00000000000000000000 |
| 5 | C | 30 | 0.42857142857142857143 |
| 6 | C | 40 | 0.57142857142857142857 |