HLEN
Syntax
HLEN key
- Available since:
- Redis Open Source 2.0.0
- Time complexity:
- O(1)
- ACL categories:
-
@read
,@hash
,@fast
,
Returns the number of fields contained in the hash stored at key
.
Examples
Return information
Integer reply: the number of fields in the hash, or 0 when the key does not exist.