EXISTS

EXISTS key

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.

Examples #

SET key1 "Hello"
EXISTS key1
EXISTS nosuchkey
SET key2 "World"
EXISTS key1 key2 nosuchkey

History #

3.0.3

Accepts multiple `key` arguments.