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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?.
14 rows affected
| ts | val |
|---|---|
| 100000 | 50 |
| 130100 | 30050 |
| 160100 | 60050 |
| 190200 | 100 |
| 220200 | 30100 |
| 250200 | 30100 |
| 300000 | 300 |
| 500000 | 100 |
| 550000 | 1000 |
| 600000 | 1000 |
| 650000 | 2000 |
| 700000 | 2000 |
| 720000 | 2000 |
| 750000 | 300 |
| ts | val | is_diff | sum |
|---|---|---|---|
| 100000 | 50 | 1 | 1 |
| 130100 | 30050 | 1 | 2 |
| 160100 | 60050 | 1 | 3 |
| 190200 | 100 | 1 | 4 |
| 220200 | 30100 | 1 | 5 |
| 250200 | 30100 | 0 | 5 |
| 300000 | 300 | 1 | 6 |
| 500000 | 100 | 1 | 7 |
| 550000 | 1000 | 1 | 8 |
| 600000 | 1000 | 0 | 8 |
| 650000 | 2000 | 1 | 9 |
| 700000 | 2000 | 0 | 9 |
| 720000 | 2000 | 0 | 9 |
| 750000 | 300 | 1 | 10 |