Memcached prepend Command

Syntax:

prepend The basic syntax format of the command is as follows:

prepend key flags exptime bytes [noreply]
value

The parameters are described as follows:

• key Key value key-value In the structure key Used to find cached values

• flags Can include integer parameters for key-value pairs, which clients use to store additional information about key-value pairs

• exptime Length of time to save key-value pairs in the cache (in seconds, 0 means forever)

• bytes Number of bytes stored in the cache

• noreply (optional): this parameter tells the server that there is no need to return data

• value The stored value (always in the second line) (which can be directly understood as key-value In the structure value )

Example

Examples are as follows:

• First we store a key in Memcached runoob Whose value is memcached .

• Then, we use the get Command to retrieve the value.

• Then, we use the prepend The command before the key is runoob Append “redis” to the value of

• Finally, we will use the get Command to retrieve the value.

set runoob 0 900 9
memcached
STORED
get runoob
VALUE runoob 0 9
memcached
END
prepend runoob 0 900 5
redis
STORED
get runoob
VALUE runoob 0 14
redismemcached
END

Output

If the data is added successfully, the output:

STORED

Output information description:

• STORED Output after being saved successfully

• NOT_STORED The key does not exist on Memcached

• CLIENT_ERROR Execution error.