TTL
Return a key's remaining TTL in seconds (-1 no TTL, -2 missing).
TTL 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
DELEXISTSEXPIREEXPIREATPERSISTPEXPIREPEXPIREATPTTLRENAMERENAMENXTYPEUNLINK