Function sqlite3_exec 

pub unsafe extern "C" fn sqlite3_exec(
    db: *mut sqlite3,
    sql: *const c_char,
    callback: Option<extern "C" fn(*mut c_void, c_int, *mut *mut c_char, *mut *mut c_char) -> c_int>,
    arg: *mut c_void,
    errmsg: *mut *mut c_char,
) -> c_int