yezhizi commented on issue #3217:
URL: https://github.com/apache/kvrocks/issues/3217#issuecomment-3570115276
> Since there are no samples in the filtered region, should it return a
single `NaN` or should it return TWA for all empty buckets `20-30, 30-40,
40-50,......80-90`. In this case all the TWA is same for all the buckets.
It should return TWA for all bucket ranges, which is different from other
aggregators.
```
127.0.0.1:6379> ts.range test1 - +
1) 1) (integer) 10
2) 34
2) 1) (integer) 95
2) 34
127.0.0.1:6379> ts.range test1 20 90 AGGREGATION TWA 10 EMPTY
1) 1) (integer) 20
2) 34
2) 1) (integer) 30
2) 34
3) 1) (integer) 40
2) 34
4) 1) (integer) 50
2) 34
5) 1) (integer) 60
2) 34
6) 1) (integer) 70
2) 34
7) 1) (integer) 80
2) 34
8) 1) (integer) 90
2) 34
127.0.0.1:6379> ts.range test1 20 90 AGGREGATION SUM 10 EMPTY
(empty array)
```
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