BF.EXISTS key item
Available in: Redis Stack
Time complexity: O(k), where k is the number of hash functions used by the last sub-filter
Determines whether an item may exist in the Bloom Filter or not.
Parameters
- key: The name of the filter
- item: The item to check for
Return
Integer reply - where "1" value means the item may exist in the filter, and a "0" value means it does not exist in the filter.
Examples
redis> BF.EXISTS bf item1
(integer) 1
redis> BF.EXISTS bf item_new
(integer) 0