presto-parser/src/main/java/io/prestosql/sql/parser/AstBuilder.java/AstBuilder/getArithmeticBinaryOperator
class AstBuilder:    private static ArithmeticBinaryExpression.Operator getArithmeticBinaryOperator(Token operator)
    {
        switch (operator.getType()) {
            case SqlBaseLexer.PLUS:
                return ArithmeticBinaryExpression.Operator.ADD;
            case SqlBaseLexer.MINUS:
                return ArithmeticBinaryExpression.Operator.SUBTRACT;
            case SqlBaseLexer.ASTERISK:
                return ArithmeticBinaryExpression.Operator.MULTIPLY;
            case SqlBaseLexer.SLASH:
                return ArithmeticBinaryExpression.Operator.DIVIDE;
            case SqlBaseLexer.PERCENT:
                return ArithmeticBinaryExpression.Operator.MODULUS;
        }

        throw new UnsupportedOperationException("Unsupported operator: " + operator.getText());
    }