{ "EXISTS": { "summary": "Determines whether one or more keys exist.", "complexity": "O(N) where N is the number of keys to check.", "group": "generic", "since": "1.0.0", "arity": -2, "function": "existsCommand", "history": [ [ "3.0.3", "Accepts multiple `key` arguments." ] ], "command_flags": [ "READONLY", "FAST" ], "acl_categories": [ "KEYSPACE" ], "command_tips": [ "REQUEST_POLICY:MULTI_SHARD", "RESPONSE_POLICY:AGG_SUM" ], "key_specs": [ { "flags": [ "RO" ], "begin_search": { "index": { "pos": 1 } }, "find_keys": { "range": { "lastkey": -1, "step": 1, "limit": 0 } } } ], "reply_schema": { "description": "Number of keys that exist from those specified as arguments.", "type": "integer" }, "arguments": [ { "name": "key", "type": "key", "key_spec_index": 0, "multiple": true } ] } }