 
| Name | Description | Type | Package | Framework | 
| Converter | A relational expression implements the interface Converter to indicate that it converts a physical attribute, or | Interface | org.apache.calcite.rel.convert | Calcite | 
| ConverterImpl | Abstract implementation of Converter. | Class | org.apache.calcite.rel.convert | Calcite | 
| ConverterRule | Abstract base class for a rule which converts from one calling convention to another without changing semantics. | Class | org.apache.calcite.rel.convert | Calcite | 
| NoneConverter | Class | org.apache.calcite.rel.convert | Calcite | |
| TraitMatchingRule | TraitMatchingRule adapts a converter rule, restricting it to fire only when its input already matches the expected output trait. | Class | org.apache.calcite.rel.convert | Calcite |