BF.ADD
Syntax
BF.ADD key item
- Available in:
- Redis Stack / Bloom 1.0.0
- Time complexity:
- O(k), where k is the number of hash functions used by the last sub-filter
Adds an item to a Bloom filter.
This command is similar to BF.MADD, except that only one item can be added.
Required arguments
key
is key name for a Bloom filter to add the item to.
If key does not exist - a new Bloom filter is created with default error rate, capacity, and expansion (see BF.RESERVE).
item
is an item to add.
Return value
Returns one of these replies:
- Integer reply - where "1" means that the item has been added successfully, and "0" means that such item was already added to the filter (which could be wrong)
- [] on error (invalid arguments, wrong key type, etc.) and also when the filter is full
Examples
redis> BF.ADD bf item1
(integer) 1
redis> BF.ADD bf item1
(integer) 0