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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
| person | persons_daughter | persons_mother | string_agg |
|---|---|---|---|
| Becky | Sally | Not in list | Sally |
| Libby | Sharon | Sally | Sharon |
| Millie | N/A | Sally | N/A |
| Sally | Libby | Becky | Libby,Millie |
| Sally | Millie | Becky | Libby,Millie |