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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?.
8 rows affected
| client_id | balance_month | balance |
|---|---|---|
| 100000000 | 2021-09-01 | 400 |
| 100000000 | 2021-08-01 | 100 |
| 100000000 | 2021-07-01 | 0 |
| 100000000 | 2021-06-01 | 0 |
| 200000000 | 2021-09-01 | 99 |
| 200000000 | 2021-08-01 | 0 |
| 200000000 | 2021-07-01 | 0 |
| 200000000 | 2021-06-01 | 0 |