lujiajing1126 edited a comment on pull request #2:
URL: https://github.com/apache/skywalking-banyandb/pull/2#issuecomment-847696572


   As we discussed this morning, the following changes are applied,
   
   - Add type system to `Pair`, so now we have `StrPair` and `IntPair`
   - Simplify `Entity`: move `duration`, `trace_id` to fields since these names 
should be defined in a Schema.
   - Remove `count` in response: we do not have statistics so far.
   - Add `projection` to select key names.
   - Rename `EntityCriteria`.
   - Add `offset` with `limit` to support paging scenario.
   - Also move `duration`, `trace_id` to fields which are indexed and add 
comments.
   
   Besides, I suppose `Range` operation is vague: it is not clear for inclusive 
or exclusive at the edges. What's your opinion?
   
   It should be a fixed size array with length 2. But this feature seems not to 
be support in all languages.
   
   Any other suggestion is welcome.


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