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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?.
a | f | n1 | n2 | n3 | n4 | l |
---|---|---|---|---|---|---|
1 | 1 | 1 | 2 | 3 | 4 | 4 |
2 | 1 | 1 | 2 | 3 | 4 | 4 |
3 | 1 | 1 | 2 | 3 | 4 | 4 |
4 | 1 | 1 | 2 | 3 | 4 | 4 |