Hi, Drillers, I am pretty new to Drill and I am trying to understand the work flow of drill query execution. When I am reading on the fragment section in http://drill.apache.org/docs/drill-query-execution/, I have some questions:
1. It looks to me that major fragment is like a spark stage in concept, and there will be shuffle between major fragments? 2. There will be one or multiple minor fragments within each major fragment, it looks to me that it is similar to Spark pipeline in one stage（there can be many operators in one stage if there is no shuffle involved） 3. When I run the Drill locally(start with drill-embedded), and run the following query select name, max(age) from hdfs.`user`.`/people.json` group by name order by name desc limit 2 The above query should involve shuffle,so that there should be at least 2 major fragments, but I find that there is only one major fragment from the drill web ui. Not sure whether my above understanding is right. Thanks!
