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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 5
| stock_date | inbound_quantity | outbound_quantity | balance |
|---|---|---|---|
| 2020-01-01 | 900 | 0 | 900 |
| 2020-01-02 | 0 | 300 | 600 |
| 2020-01-03 | 400 | 250 | 750 |
| 2020-01-04 | 0 | 100 | 650 |
| 2020-01-05 | 700 | 500 | 850 |
SELECT 5