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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?.
| mytimestamp | trunc_mytimestamp | round_mytimestamp |
|---|---|---|
| 2010-01-01 14:34:43.567543 | 2010-01-01 14:34:43 | 2010-01-01 14:34:44 |