Determine if a keys exists¶
SYNOPSIS¶
- #include <libmemcached/memcached.h>
Compile and link with -lmemcached
-
memcached_return_t
memcached_exist
(memcached_st *ptr, char *key, size_t *key_length)¶
-
memcached_return_t
memcached_exist_by_key
(memcached_st *ptr, char *group_key, size_t *group_key_length, char *key, size_t *key_length)¶ - Parameters
ptr -- pointer to an initialized
memcached_st
structgroup_key -- the key namespace
group_key_length -- length of the
group_key
without any terminating zerokey -- the key to check
key_length -- length of the
key
without any terminating zero
- Returns
memcached_return_t
indicating success
New in version 0.53.
DESCRIPTION¶
memcached_exist()
can be used to check if a key exists.
RETURN VALUE¶
MEMCACHED_SUCCESS
The key exists.
MEMCACHED_NOTFOUND
The key was not found.