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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
CREATE FUNCTION
CREATE TRIGGER
CREATE FUNCTION
CREATE TRIGGER
exchange_id | buy_curr_code | sell_curr_code | rate | inserted_at |
---|---|---|---|---|
1 | 11 | 22 | 1.2 | 2023-01-25 10:00:00+00 |
2 | 22 | 33 | 1.3 | 2023-01-25 11:00:00+00 |
3 | 11 | 33 | 1.6 | 2023-01-25 12:00:00+00 |
INSERT 0 3
UPDATE 1
UPDATE 1
exchange_id | buy_curr_code | sell_curr_code | rate | inserted_at |
---|---|---|---|---|
3 | 11 | 33 | 1.6 | 2023-01-25 12:00:00+00 |
1 | 11 | 22 | 0.66 | 2023-01-25 13:00:00+00 |
2 | 22 | 33 | 0.77 | 2023-01-25 14:00:00+00 |
SELECT 3
exchange_id | rate | inserted_at |
---|---|---|
1 | 1.2 | 2023-01-25 10:00:00+00 |
2 | 1.3 | 2023-01-25 11:00:00+00 |
3 | 1.6 | 2023-01-25 12:00:00+00 |
1 | 0.66 | 2023-01-25 13:00:00+00 |
2 | 0.77 | 2023-01-25 14:00:00+00 |
SELECT 5