Macro mysql_common::params

macro_rules! params {
    ($($name:expr => $value:expr),*) => { ... };
    ($($name:expr => $value:expr),*,) => { ... };
}

Macro to conveniently generate named parameters for a statement. Parameter name is T where String: From<T>, and

params! {
    "param_name_1" => param_value_1,
    "param_name_2" => param_value_2,
}