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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 6
id f_id name sort
2 1 alpha 1
4 1 beta 2
3 1 gamma 3
5 1 delta null
6 1 epsilon null
1 1 zeta -1
SELECT 6
id f_id name sort
2 1 alpha 1
4 1 beta 2
3 1 gamma 3
5 1 delta null
6 1 epsilon null
1 1 zeta -1
SELECT 6