Macro mysql_async::params
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macro_rules! params { ($($name:expr => $value:expr),*) => { ... }; ($($name:expr => $value:expr),*,) => { ... }; }
This macro allows you to pass named params to a prepared statement.
Example
conn.prep_exec("SELECT :param1, :param2, :param1", params! { "param1" => "foo", "param2" => "bar", });