By using db<>fiddle, you agree to license everything you submit by Creative Commons CC0.
Help with an interesting Postgres question: Why isn't an Index Only Scan used on a partition accessed via the parent table?.
CREATE TABLE
CREATE TABLE
INSERT 0 7
INSERT 0 6
CREATE INDEX
CREATE INDEX
CREATE INDEX
subject_group_id |
---|
2 |
3 |
1 |
SELECT 3