| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 55 of 138 | 60% | 10 of 22 | 54% | 8 | 15 | 12 | 32 | 1 | 4 |
| visitPhysicalDeferMaterializeTopN(PhysicalDeferMaterializeTopN, CascadesContext) | | 0% | | 0% | 2 | 2 | 8 | 8 | 1 | 1 |
| checkTopN(TopN) | | 73% | | 55% | 6 | 10 | 4 | 15 | 0 | 1 |
| visitPhysicalTopN(PhysicalTopN, CascadesContext) | | 100% | | 100% | 0 | 2 | 0 | 8 | 0 | 1 |
| TopNScanOpt() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |