# FormulaFunctionNode (/docs/core/reference/api/interfaces/FormulaFunctionNode)



[@kysoql/core](/docs/core/reference/api) / FormulaFunctionNode

Immutable query AST node for a Salesforce formula filter function.

## Properties [#properties]

| Property                                            | Modifier   | Type                                                                                           | Description                                                      |
| --------------------------------------------------- | ---------- | ---------------------------------------------------------------------------------------------- | ---------------------------------------------------------------- |
| <a id="api-property-kind" /> `kind`                 | `readonly` | `"FormulaFunctionNode"`                                                                        | Node discriminator used by Kysoql compilers and plugin visitors. |
| <a id="api-property-leftoperand" /> `leftOperand`   | `readonly` | [`ReferenceNode`](/docs/core/reference/api/type-aliases/ReferenceNode)                         | Left operand of the operation.                                   |
| <a id="api-property-operator" /> `operator`         | `readonly` | [`FormulaArithmeticOperator`](/docs/core/reference/api/type-aliases/FormulaArithmeticOperator) | SOQL comparison or arithmetic operator.                          |
| <a id="api-property-rightoperand" /> `rightOperand` | `readonly` | [`ReferenceNode`](/docs/core/reference/api/type-aliases/ReferenceNode)                         | Right operand of the operation.                                  |