| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 10 of 26 | 61% | 0 of 0 | n/a | 3 | 4 | 3 | 6 | 3 | 4 |
| getParameterTypes(RelDataTypeFactory) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| getType() | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| getReturnType(RelDataTypeFactory) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| SqlHistogramAggFunction(RelDataType) | | 100% | n/a | 0 | 1 | 0 | 3 | 0 | 1 |