}

func handleDateAdd(r Record, d *DateAddFunc, tableAlias string) (*Value, error) {
	q, err := d.Quantity.evalNode(r, tableAlias)
	if err != nil {
		return nil, err
	}
	inferTypeForArithOp(q)
	qty, ok := q.ToFloat()
	if !ok {
		return nil, fmt.Errorf("QUANTITY must be a numeric argument to %s()", sqlFnDateAdd)
	}

	ts, err := d.Timestamp.evalNode(r, tableAlias)
	if err != nil {

// operation shall succeed. If the types are unknown automatic type
// conversion to a number is attempted.
func (v *Value) arithOp(op string, a *Value) error {
	err := inferTypeForArithOp(v)
	if err != nil {
		return err
	}

	err = inferTypeForArithOp(a)
	if err != nil {
		return err
	}

	if !v.isNumeric() || !a.isNumeric() {
		return errInvalidDataType(errArithMismatchedTypes)
	}

	if e.Negated == nil {
		return e.Primary.evalNode(r, tableAlias)
	}

	v, err := e.Negated.Term.evalNode(r, tableAlias)
	if err != nil {
		return nil, err
	}

	inferTypeForArithOp(v)
	v.negate()
	if v.isNumeric() {
		return v, nil
	}
	return nil, errArithMismatchedTypes
}

func (e *JSONPath) evalNode(r Record, tableAlias string) (*Value, error) {
	alias := tableAlias