CF.MEXISTS key item [item ...]
Available in:
Redis Stack / Bloom 1.0.0
Time complexity:
O(k * n), where k is the number of sub-filters and n is the number of items

Determines whether one or more items were added to a cuckoo filter.

This command is similar to CF.EXISTS, except that more than one item can be checked.

Required arguments


is key name for a cuckoo filter.


One or more items to check.

Return value

Returns one of these replies:

  • Array reply of Integer reply - where "1" means that, with high probability, item was already added to the filter, and "0" means that key does not exist or that item had not added to the filter. See note in CF.DEL.
  • [] on error (invalid arguments, wrong key type, etc.)


redis> CF.INSERT cf ITEMS item1 item2
1) (integer) 1
2) (integer) 1
redis> CF.MEXISTS cf item1 item2 item3
1) (integer) 1
2) (integer) 1
3) (integer) 0

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