HLEN
Return the number of fields in a hash.
HLEN keyComplexity
O(1)
Complexity and compatibility are read out of kevy's implementation, not copied from Redis's reference. Several genuinely differ.
Redis compatibility
Compatible
Behaves as Redis does.
See also
HDELHEXISTSHEXPIREHGETHGETALLHINCRBYHKEYSHMGETHMSETHPERSISTHPEXPIREHPEXPIREATHPTTLHSCANHSETHSETNXHTTLHVALS