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Dir : /opt/redis-7/src/commands/
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Dir : //opt/redis-7/src/commands/pfcount.json

{
    "PFCOUNT": {
        "summary": "Returns the approximated cardinality of the set(s) observed by the HyperLogLog key(s).",
        "complexity": "O(1) with a very small average constant time when called with a single key. O(N) with N being the number of keys, and much bigger constant times, when called with multiple keys.",
        "group": "hyperloglog",
        "since": "2.8.9",
        "arity": -2,
        "function": "pfcountCommand",
        "command_flags": [
            "READONLY",
            "MAY_REPLICATE"
        ],
        "acl_categories": [
            "HYPERLOGLOG"
        ],
        "key_specs": [
            {
                "notes": "RW because it may change the internal representation of the key, and propagate to replicas",
                "flags": [
                    "RW",
                    "ACCESS"
                ],
                "begin_search": {
                    "index": {
                        "pos": 1
                    }
                },
                "find_keys": {
                    "range": {
                        "lastkey": -1,
                        "step": 1,
                        "limit": 0
                    }
                }
            }
        ],
        "arguments": [
            {
                "name": "key",
                "type": "key",
                "key_spec_index": 0,
                "multiple": true
            }
        ],
        "reply_schema": {
            "description": "The approximated number of unique elements observed via PFADD",
            "type": "integer"
        }
    }
}