Type Alias Udf_func_double 

pub type Udf_func_double = Option<unsafe extern "C" fn(initid: *mut UDF_INIT, args: *const UDF_ARGS, is_null: *mut c_uchar, error: *mut c_uchar) -> c_double>;

Function signature of an xxx(...) function returning a SQL real

Aliased Type

pub enum Udf_func_double {
    None,
    Some(unsafe extern "C" fn(*mut UDF_INIT, *const UDF_ARGS, *mut u8, *mut u8) -> f64),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut UDF_INIT, *const UDF_ARGS, *mut u8, *mut u8) -> f64)

Some value of type T.