alamb commented on issue #20195:
URL: https://github.com/apache/datafusion/issues/20195#issuecomment-4164483818

   
   > I imagine this would still imply having a way to route dynamic filters 
from partition 0 from the build to partition 0 from the probe right? even if 
it's not in the Dynamic Filter itself. I'm not sure if we have a way to know 
how to match these two (like having access to partition number) 
   
   What I was thinking about was that at planning time we could figure out if 
the partitions matched 1x1 and if so just create a specific dynamic filter for 
each partition
   


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