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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
| id | columnb | new_col |
|---|---|---|
| 120 | x | bb |
| 355 | x | bb |
| 122 | x | aa |
| 352 | x | aa |
| 355 | x | cc |
SELECT 5