hanahmily commented on issue #13811:
URL: https://github.com/apache/skywalking/issues/13811#issuecomment-4236083924

   > For testing the distributed TopN query, my entry point was 
banyand/dquery/topn.go. However, at this entry point, there was no pushdown.
   
   Aggregation is carried out solely on the liaison node. Each data node sends 
back its pre-aggregation list, and the liaison node completes the final 
aggregation. This aggregation process happens during the write phase on each 
data node, not during querying. That's the reason why there is no push-down. 


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