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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?.
5 rows affected
| prdct_nme1 | prdct_nme2 |
|---|---|
| 三角鉛筆 | 藍桿鉛筆 |
| 三角鉛筆 | 黃桿鉛筆 |
| 三角鉛筆 | 學習鉛筆 |
| 三角鉛筆 | 代針筆 |
| 藍桿鉛筆 | 黃桿鉛筆 |
| 藍桿鉛筆 | 學習鉛筆 |
| 藍桿鉛筆 | 代針筆 |
| 黃桿鉛筆 | 學習鉛筆 |
| 黃桿鉛筆 | 代針筆 |
| 學習鉛筆 | 代針筆 |