使用Azure Redis缓存（启用了TimeSeries模块的Enterprise E10），可以通过调用以下命令来检索键“12345678：5”的时间序列中的所有时间戳：

$ TS.RANGE 12345678:5 - +
 1) 1) (integer) 1693407731665
    2) 1
 2) 1) (integer) 1693407731694
    2) 1
 3) 1) (integer) 1693407731745
    2) 1
 4) 1) (integer) 1693407731771
    2) 1
...
18) 1) (integer) 1693407732075
    2) 1
19) 1) (integer) 1693407732103
    2) 1
20) 1) (integer) 1693407732127
    2) 1

但我只对最近30分钟（1800000毫秒）的时间戳/值感兴趣。
因此，我通过Lua脚本计算时间戳“start”和“now”：

$ EVAL "local time = redis.call('TIME'); local now = time[1] * 1000 + time[2] / 1000; local start = now - tonumber(ARGV[1]); return { tonumber(ARGV[1]), start, now }" 1 12345678:5 1800000
1) (integer) 1800000
2) (integer) 1693493878001
3) (integer) 1693495678001

然后我尝试使用Lua脚本调用TS.RANGE：

$ EVAL "local time = redis.call('TIME'); local now = time[1] * 1000 + time[2] / 1000; local start = now - tonumber(ARGV[1]); local tsrange = redis.call('TS.RANGE', KEYS[1], start, now); return tsrange" 1 12345678:5 1800000
(error) ERR Error running script (call to f_a99152dc66083038fe6d6b9b6acef33495ef1960): @user_script:1: ERR TSDB: wrong fromTimestamp

请告诉我，我做错了什么？
我的真实的背景是，我尝试在我的C# web应用中调用TS.ADD和TS.RANGE（自动过期似乎并不真正工作，所以我不能只调用TS.RANGE key - +，但必须显式地指定TS.RANGE的fromTimestamp，toTimestamp参数）：

private static readonly TimeSpan RETENTION_TIME = TimeSpan.FromMinutes(30);
// The script returns 0 if there are 20 or more timestamps in the past 30 min (1800000 ms).
// Otherwise it adds a new timestamp to the time series at the key and returns 1.
private const string LUA_SCRIPT =
@"
local sum = 0
local time = redis.call('TIME')
-- the final timestamp for TS.RANGE command in milliseconds
local now = time[1] * 1000 + time[2] / 1000
-- the start timestamp for TS.RANGE command in milliseconds
local start = now - tonumber(ARGV[1])
local tsrange = redis.call('TS.RANGE', KEYS[1], start, now)

for i = 1, #tsrange do
    -- calculate a sum of all values stored in the time series, from start to now
    sum = sum + tsrange[i][2]['ok']

    -- if there are enough timestamps in the time period, then just return 0
    if (sum >= 20) then
        return 0
    end
end

-- otherwise add the current timestamp and the value 1 to the time series
redis.call('TS.ADD', KEYS[1], '*', 1, 'RETENTION', ARGV[1], 'ON_DUPLICATE', 'SUM', 'ENCODING', 'UNCOMPRESSED')
return 1
";

private static async Task<bool> AddTimestampAsync(IDatabase db, string key, long retentionTime)
{
    RedisResult result = await db.ScriptEvaluateAsync(LUA_SCRIPT, new RedisKey[] { key }, new RedisValue[] { retentionTime });
    // return true if the Lua script returns 1, otherwise false
    return result.Type == ResultType.Integer && (int)result == 1;
}

我希望我不必通过修改上面的for循环和逐个比较每个时间戳来解决我的问题。