HSETNX
HSETNX key field value
- Available since
- 2.0.0
- Time complexity
- O(1)
- ACL categories
- @write, @hash, @fast
Sets field
in the hash stored at key
to value
, only if field
does not
yet exist.
If key
does not exist, a new key holding a hash is created.
If field
already exists, this operation has no effect.
Examples #
HSETNX myhash field "Hello"
HSETNX myhash field "World"
HGET myhash field