Redis Msetnx Command

Redis Strings (string)

The Redis Msetnx command is used to set one or more keys at the same time when all the given keys do not exist-value pair.

Syntax

The basic syntax of the Redis Msetnx command is as follows:

redis 127.0.0.1:6379> MSETNX key1 value1 key2 value2 .. keyN valueN 

Available Versions

>= 1.0.1

Return Value

When all keys are successfully set, return 1 . If all given keys fail to set (at least one key already exists), then return 0 .

Online Examples

# MSETNX on non-existing keys
redis> MSETNX rmdbs "MySQL" nosql "MongoDB" key-value-store "redis"
(integer) 1
redis> MGET rmdbs nosql key-value-store
1) "MySQL"
2) "MongoDB"
3) "redis"
# MSET has an existing key among the given keys
redis> MSETNX rmdbs "Sqlite" language "python"  # rmdbs key already exists, operation failed
(integer) 0
redis> EXISTS language                          # language has not been set due to the atomicity of MSET
(integer) 0
redis> GET rmdbs                                # rmdbs has not been modified
"MySQL"

Redis Strings (string)