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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?.
2 rows affected
| xyear | q1 | q2 | q3 | q4 |
|---|---|---|---|---|
| 2017 | 200 | 250 | 235 | 266 |
| 2018 | 195 | 220 | 215 | 240 |
| 年度 | 各季 | 購買金額 |
|---|---|---|
| 2017 | q1 | 200 |
| 2017 | q2 | 250 |
| 2017 | q3 | 235 |
| 2017 | q4 | 266 |
| 2018 | q1 | 195 |
| 2018 | q2 | 220 |
| 2018 | q3 | 215 |
| 2018 | q4 | 240 |