{ "XRANGE": { "summary": "Returns the messages from a stream within a range of IDs.", "complexity": "O(N) with N being the number of elements being returned. If N is constant (e.g. always asking for the first 10 elements with COUNT), you can consider it O(1).", "group": "stream", "since": "5.0.0", "arity": -4, "function": "xrangeCommand", "history": [ [ "6.2.0", "Added exclusive ranges." ] ], "command_flags": [ "READONLY" ], "acl_categories": [ "STREAM" ], "key_specs": [ { "flags": [ "RO", "ACCESS" ], "begin_search": { "index": { "pos": 1 } }, "find_keys": { "range": { "lastkey": 0, "step": 1, "limit": 0 } } } ], "reply_schema": { "description": "Stream entries with IDs matching the specified range.", "type": "array", "uniqueItems": true, "items": { "type": "array", "minItems": 2, "maxItems": 2, "items": [ { "description": "Entry ID", "type": "string", "pattern": "[0-9]+-[0-9]+" }, { "description": "Data", "type": "array", "items": { "type": "string" } } ] } }, "arguments": [ { "name": "key", "type": "key", "key_spec_index": 0 }, { "name": "start", "type": "string" }, { "name": "end", "type": "string" }, { "token": "COUNT", "name": "count", "type": "integer", "optional": true } ] } }