Function array_ref

pub unsafe fn array_ref(
    arg_array: *mut ArrayType,
    arg_nSubscripts: c_int,
    arg_indx: *mut c_int,
    arg_arraytyplen: c_int,
    arg_elmlen: c_int,
    arg_elmbyval: bool,
    arg_elmalign: c_char,
    arg_isNull: *mut bool,
) -> Datum