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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 2
CREATE TABLE
INSERT 0 2
CREATE FUNCTION
pool spa house_size sauna no_rooms
1 1 1 25 0
1 0 1 35 0
SELECT 2
pool spa house_size sauna no_rooms
1 1 1 25 2
1 0 1 35 3
SELECT 2
pool has_spa sauna house_size rooms
1 1 25 1 0
1 0 35 1 0
SELECT 2