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Binbin authored
XREADGROUP can output a misleading error message regarding use of the $ special ID. Here is the example (with some newlines): ``` redis> xreadgroup group workers worker1 count 1 streams mystream (error) ERR Unbalanced XREAD list of streams: for each stream key an ID or '$' must be specified. redis> xreadgroup group workers worker1 count 1 streams mystream $ (error) ERR The $ ID is meaningless in the context of XREADGROUP: you want to read the history of this consumer by specifying a proper ID, or use the > ID to get new messages. The $ ID would just return an empty result set. redis> xreadgroup group workers worker1 count 1 streams mystream > 1) 1) "mystream" 2) 1) 1) "1673544607848-0" 2) 1) "n" 2) "1" ``` Note that XREADGROUP first returns an error with the following problems in it: - Command name in the error should be XREADGROUP not XREAD. - It recommends using $ as an option for a stream ID, then when y...
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