{ "TOUCH": { "summary": "Returns the number of existing keys out of those specified after updating the time they were last accessed.", "complexity": "O(N) where N is the number of keys that will be touched.", "group": "generic", "since": "3.2.1", "arity": -2, "function": "touchCommand", "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 } } } ], "arguments": [ { "name": "key", "type": "key", "key_spec_index": 0, "multiple": true } ], "reply_schema": { "description": "the number of touched keys", "type": "integer", "minimum": 0 } } }