[GitHub] [pinot] kishoreg commented on issue #7213: Support generic sliding window aggregations

[GitBox <gi...@apache.org>]

kishoreg commented on issue #7213:
URL: https://github.com/apache/pinot/issues/7213#issuecomment-1012483684


   @amrishlal 
   
   Can you please address the comments from @Jackie-Jiang  in the design doc? This is a complex feature and the design doc is mostly describing how Pinot operators work. It will help me a lot if you can expand on the following topics
   - How will the Window Operator work
   - Current proposed solution of pulling all records into a broker is not a scalable solution. Pulling all records into a single broker memory is not going to scale.
   - Without a distributed solution, the response times are going to be orders of magnitude slower than running it via Presto/Trino connector
   - In a typical database, Window operators are built on solid distributed partitioning, sorting primitives, and have some commonalities with primitives needed JOIN. Adding Joins first and then the window function is better in terms of sequencing.
   - Nothing related to the design but the estimates in the design doc gives me a feeling that we are grossly underestimating the complexity here
   
   Overall I am +1 on adding this feature but -1 on the design.
   


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