Used for return value only. Represents value unknown in this version.
The IN operator.
The IDENTITY operator.
The EQUALS operator
Operator that takes two or more operands that are of type FunctionOperand and checks that all the operands evaluate to true. For functions related to ad formats, all the operands must be in left_operands.
Operator that returns true if the elements in left_operands contain any of the elements in right_operands. Otherwise, return false. The right_operands must contain at least 1 and no more than 3 ConstantOperands.