Driver Implementation
- Topk result:
topk: a sorted list of a topk item
statistics: (optional) query result statistics.
additional_series: (optional) a list of additional series (e.g. the total series).
- Topk item:
tags: a map tag_name -> tag_value
value: the integral value for the topk item on the specified time range
A timeseries driver must implement the API described below.