memcached_get (memcached_st *ptr,
const char *key, size_t key_length,
size_t *value_length,
uint32_t *flags,
memcached_return_t *error);
Why need to pass the params "size_t key_length" and "size_t *value_length" here ? I think the value can be fetched by key directly.
who can help to tell me the reason, thanks.