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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?.
7 rows affected
| id | date | account_id | browser_cookie_id | prev_group_date | prev_date |
|---|---|---|---|---|---|
| 1 | 2020-1-1 | e12345 | 123 | null | null |
| 3 | 2020-1-3 | e67890 | 123 | null | 2020-1-2 |
| 6 | 2020-1-5 | e67890 | 456 | null | 2020-1-4 |
| 5 | 2020-1-5 | e12345 | 123 | 2020-1-2 | 2020-1-5 |
| 7 | 2020-1-6 | e12345 | 789 | null | 2020-1-5 |