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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 18
| client_id | count_fails | count_completed | ?column? |
|---|---|---|---|
| c1 | 3 | 1 | 3 |
| c2 | 2 | 1 | 2 |
| c3 | 4 | 0 | null |
| c4 | 0 | 1 | 0 |
| c5 | 1 | 0 | null |
| c6 | 0 | 1 | 0 |
| c7 | 1 | 0 | null |
| c8 | 3 | 0 | null |
SELECT 8