Available since: 1.0.0
Time complexity: O(N) where N is the number of keys to check.
ACL categories:
@keyspace
@read
@fast
Returns if key
exists.
The user should be aware that if the same existing key is mentioned in the arguments multiple times, it will be counted multiple times. So if somekey
exists, EXISTS somekey somekey
will return 2.
Integer reply, specifically the number of keys that exist from those specified as arguments.
key
arguments.