Redis Getset Command

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Redis Getset Command

Redis Strings

Redis Getset command is used to set the value of a specified key and return the old value of the key.

Syntax

The basic syntax of redis Getset command is as follows:

redis 127.0.0.1:6379> GETSET KEY_NAME VALUE

Available Versions

>= 1.0.0

Return Value

Returns the old value of the given key. When the key has no old value, i.e., the key does not exist, it returns nil.

When the key exists but is not of string type, it returns an error.

Example

First, set the value of mykey and truncate the string.

redis> GETSET db mongodb # No old value, returns nil(nil)
redis> GET db "mongodb"
redis> GETSET db redis # Returns old value mongodb"mongodb"
redis> GET db "redis"

Redis Strings