All Known Implementing Classes:
ArithmeticOperand, ListOperand, LiteralOperand, ParameterOperand, PropertyOperand, RawOperand

public interface Operand
One operand of a condition: a side of a WHERE comparison or an inline property value. Concrete kinds are PropertyOperand (a variable.key resolved from the matched element), LiteralOperand (a constant), ArithmeticOperand (an arithmetic expression), ListOperand (an IN list), and RawOperand (kept verbatim when not decomposed). Modelling each explicitly lets n.age > m.age be told apart from n.age > "m.age".