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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
CREATE TABLE
INSERT 0 3
INSERT 0 2
| currency_type | user_id | sum |
|---|---|---|
| aaa | 404 | 2030 |
| bbb | 404 | 300 |
| xxx | 404 | 50 |
SELECT 3