milenkovicm commented on PR #1647:
URL: 
https://github.com/apache/datafusion-ballista/pull/1647#issuecomment-4365906094

   > I’m not sure the current AQE implementation is suitable. It might eagerly 
repartition both sides of the join.
   > 
   > We’ll likely need a rule for optimising broadcast join replanning as 
stages progress and new statistics are gathered.
   > 
   > To support this, I believe we should step back from the current AQE 
implementation. Instead of eagerly splitting the entire plan into stages, we 
should focus on the independent, executable parts of the plan. I’ve considered 
this as an alternative to the current approach but now I feel we have a 
compelling reason to do it.
   > 
   > This should simplfy design making planning and reoptimization simpler
   
   updated AQE in #1649


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