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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?.
16 rows affected
| bus | route | count |
|---|---|---|
| Slowcoach | SC555 | 4 |
| Slowcoach | SC123 | 3 |
| SpeedyTram | ST222 | 4 |
| SpeedyTram | ST111 | 2 |