memcached_exist - Man Page

#include <libmemcached/memcached.h>

Compile and link with -lmemcached

memcached_return_t <#_CPPv418memcached_return_t> memcached_exist(memcached_st <#_CPPv412memcached_st> *ptr, char *key, size_t *key_length)

memcached_return_t <#_CPPv418memcached_return_t> memcached_exist_by_key(memcached_st <#_CPPv412memcached_st> *ptr, char *group_key, size_t *group_key_length, char *key, size_t *key_length)

Parameters

• ptr -- pointer to an initialized memcached_st <#_CPPv412memcached_st> struct
• group_key -- the key namespace
• group_key_length -- length of the group_key without any terminating zero
• key -- the key to check
• key_length -- length of the key without any terminating zero

Returns

memcached_return_t <#_CPPv418memcached_return_t> indicating success

Added in version 0.53.

memcached_exist() can be used to check if a key exists.

MEMCACHED_SUCCESS <#_CPPv4N18memcached_return_t17MEMCACHED_SUCCESSE>

The key exists.

MEMCACHED_NOTFOUND <#_CPPv4N18memcached_return_t18MEMCACHED_NOTFOUNDE>

The key was not found.

memcached(1) <https://linux.die.net/man/1/memcached> libmemcached(3) <https://linux.die.net/man/3/libmemcached> memcached_strerror(3) <https://linux.die.net/man/3/memcached_strerror>

libmemcached(3).