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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?.
4 rows affected
| a | b | c | d | e | cnt |
|---|---|---|---|---|---|
| 2 | 1 | 2 | 5 | 4 | (4) |
| 1 | 5 | 5 | 6 | 5 | (3) |
| 2 | 1 | 4 | 2 | 5 | (4) |
| 1 | 1 | 1 | 1 | 2 | (2) |