[GitHub] [pinot] ankitsultana opened a new issue, #9325: [multistage] Support for Serving Multi-Stage Query from the Same Replica Group

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

ankitsultana opened a new issue, #9325:
URL: https://github.com/apache/pinot/issues/9325

   There are a few use-cases where we'd like to serve a query for all tables involved in a multi-stage query from the same replica-group. Examples:
   
   1. Colocated Join
   2. Self-Join for Upsert Tables (strictReplicaGroup routing won't work since BaseInstanceSelector uses an auto-incrementing requestId)
   
   One rough idea to support this is:
   
   1. Pass Pinot Broker requestId to BaseInstanceSelector instead of using its own auto-incrementing requestId.
   2. To pass requestId from Broker Request Handlers to the BaseInstanceSelector, add requestId to BrokerRequest.
   
   cc: @walterddr @Jackie-Jiang 


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