Determine if a keys exists.¶
+Determine if a keys exists¶
SYNOPSIS¶
-#include <libmemcached/memcached.h>
+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
(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)¶
- - -+
New in version 0.53.
- -
+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
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
indicating success- ptr -- pointer to an initialized
Compile and link with -lmemcached
+New in version 0.53.
+DESCRIPTION¶
-memcached_exist()
can be used to check to see if a key exists. No value is returned if the key exists, or does not exist, on the server.
memcached_exist()
can be used to check if a key exists.
RETURN¶
-memcached_exist()
sets error to
-to MEMCACHED_SUCCESS
upon finding that the key exists.
-MEMCACHED_NOTFOUND
will be return if the key is not found.
HOME¶
-To find out more information please check: -http://libmemcached.org/
+RETURN VALUE¶
+-
+
MEMCACHED_SUCCESS
+- The key exists. +
MEMCACHED_NOTFOUND
+- The key was not found. +
SEE ALSO¶
-memcached(1) libmemcached(3) memcached_strerror(3)
+- © Copyright 2011-2020 Brian Aker, Michael Wallner + © Copyright