| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 57 of 138 | 58% | 12 of 22 | 45% | 10 | 15 | 13 | 32 | 1 | 4 |
| visitPhysicalDeferMaterializeTopN(PhysicalDeferMaterializeTopN, CascadesContext) | | 0% | | 0% | 2 | 2 | 8 | 8 | 1 | 1 |
| checkTopN(TopN) | | 69% | | 44% | 8 | 10 | 5 | 15 | 0 | 1 |
| visitPhysicalTopN(PhysicalTopN, CascadesContext) | | 100% | | 100% | 0 | 2 | 0 | 8 | 0 | 1 |
| TopNScanOpt() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |