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Posted to notifications@skywalking.apache.org by GitBox <gi...@apache.org> on 2022/02/28 12:57:22 UTC

[GitHub] [skywalking-banyandb] lujiajing1126 commented on pull request #87: Add groupBy to the measure query request

lujiajing1126 commented on pull request #87:
URL: https://github.com/apache/skywalking-banyandb/pull/87#issuecomment-1054229876


   In the current api design, as I understand, we can only have one single aggregation on a single field, `SELECT AVG(field_A) FROM measure_A GROUP BY tag_A`.
   
   An alternative approach would be to separate field projection as `one_of`,
   
   1. Direct Field Projection with a field name, `SELECT latency ...`
   2. Indrect Field Projection with a field name, aggregation method and an alias, e.g. `SELECT AVG(latency) as avg_latency,  MAX(latency) as max_latency ...`
   
   while `groupBy` is only a single tag name. WDYT?


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