jamesyfshao commented on issue #4261: implement upsert support on pinot URL: https://github.com/apache/incubator-pinot/issues/4261#issuecomment-497497405 summary on 1st discussion of upsert design (May 15th): 1. @Jackie-Jiang points out that current design of rewriting queries for upsert table is problematic as this cause too much overhead in pinot query process with so many or-conditions. We should look into method to reduce the query overhead in upsert table 2. We should look into message delivery from coordinator service to pinot server. @Jackie-Jiang proposed methods on re-using existing download API on coordinator service to deliver messages from coordinator to server for unified API. 3. How to handle kafka topic partition change. @mcvsubbu suggested that we should look into how to handle accidental expand of kafka topic if that happens.
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