The initial version is not binary safe. Due to the way the MySQL Memcache plugins works there are restrictions related to separators.
Prepared statements and asynchronous queries are not supported. Result set meta data support is limited.
The mapping information for tables accessible via Memcache is not cached
in the plugin between requests but fetched from the MySQL server each time
a MySQL connection is associated with a Memcache connection. See
mysqlnd_memcache_set for details.