SELECT plproxy.memcached_set('aaa', '222',  2 );
ERROR:  invalid byte sequence for encoding "UTF8": 0x00
HINT:  This error can also happen if the byte sequence does not match the encoding expected by the server, which is controlled by "client_encoding".

CREATE OR REPLACE FUNCTION plproxy.memcached_set(skey text, val text, ttl integer) RETURNS TEXT AS $$
    CLUSTER 'queries'; RUN ON ANY;
    SELECT banner.memcached_set($ 1 , $ 2 , $ 3 );
$$ LANGUAGE plproxy;

CREATE OR REPLACE FUNCTION banner.memcached_set(skey text, svalue text, ttl integer) RETURNS integer AS $$

import memcache


cl = memcache.Client(["127.0.0.1:11211",])

if int(ttl) ==  0 :
   s =  cl.set(skey,svalue)
elif int(ttl) ==  1 :
   import time
   from datetime import datetime, timedelta
   nextday = datetime.now().date() + timedelta( 1 )
   nextday_stamp = int(time.mktime(nextday.timetuple()))
   s = cl.set(skey, svalue, nextday_stamp)
else:
   s = cl.set(skey, svalue, ttl)

if s:
   return  1 
else:
   return  0 
 
$$
LANGUAGE plpythonu;