Function unqlite_sys::unqlite_kv_fetch

pub unsafe extern "C" fn unqlite_kv_fetch(
    pDb: *mut unqlite, 
    pKey: *const c_void, 
    nKeyLen: c_int, 
    pBuf: *mut c_void, 
    pBufLen: *mut unqlite_int64
) -> c_int