Type Alias Udf_func_string

pub type Udf_func_string = Option<unsafe extern "C" fn(initid: *mut UDF_INIT, args: *const UDF_ARGS, result: *mut c_char, length: *mut c_ulong, is_null: *mut c_uchar, error: *mut c_uchar) -> *mut c_char>;

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

Aliased Type

pub enum Udf_func_string {
    None,
    Some(unsafe extern "C" fn(*mut UDF_INIT, *const UDF_ARGS, *mut i8, *mut u64, *mut u8, *mut u8) -> *mut i8),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut UDF_INIT, *const UDF_ARGS, *mut i8, *mut u64, *mut u8, *mut u8) -> *mut i8)

Some value of type T.