| Histogram(boolean, Expression, Expression, Expression) |  | 0% | | n/a | 1 | 1 | 2 | 2 | 1 | 1 |
| Histogram(Expression, Expression, Expression) | | 0% | | n/a | 1 | 1 | 2 | 2 | 1 | 1 |
| Histogram(boolean, Expression, Expression) | | 0% | | n/a | 1 | 1 | 2 | 2 | 1 | 1 |
| Histogram(boolean, Expression) | | 0% | | n/a | 1 | 1 | 2 | 2 | 1 | 1 |
| Histogram(boolean, List) | | 0% | | n/a | 1 | 1 | 2 | 2 | 1 | 1 |
| checkLegalityBeforeTypeCoercion() |  | 58% | | 50% | 1 | 2 | 1 | 3 | 0 | 1 |
| resultForEmptyInput() | | 0% | | n/a | 1 | 1 | 1 | 1 | 1 | 1 |
| static {...} | | 100% | | n/a | 0 | 1 | 0 | 5 | 0 | 1 |
| Histogram(Expression, Expression) | | 100% | | n/a | 0 | 1 | 0 | 2 | 0 | 1 |
| Histogram(Expression) | | 100% | | n/a | 0 | 1 | 0 | 2 | 0 | 1 |
| withDistinctAndChildren(boolean, List) | | 100% | | n/a | 0 | 1 | 0 | 1 | 0 | 1 |
| accept(ExpressionVisitor, Object) | | 100% | | n/a | 0 | 1 | 0 | 1 | 0 | 1 |
| Histogram(AggregateFunctionParams) | | 100% | | n/a | 0 | 1 | 0 | 2 | 0 | 1 |
| getSignatures() | | 100% | | n/a | 0 | 1 | 0 | 1 | 0 | 1 |