Function make_udf

datafusion/sql/tests/sql_integration.rs:3601–3603

(name: &'static str, args: Vec<DataType>, return_type: DataType)

}

fn make_udf(name: &'static str, args: Vec<DataType>, return_type: DataType) -> ScalarUDF {
    ScalarUDF::new_from_impl(DummyUDF::new(name, args, return_type))
}

/// Mocked UDF
#[derive(Debug, PartialEq, Eq, Hash)]