comphead commented on PR #5748:
URL: 
https://github.com/apache/arrow-datafusion/pull/5748#issuecomment-1489020087

   > > > The analyzer is assigning incorrect nullability flags to the right 
side of the join. I wonder if we shouldn't fix this inst
   > > 
   > > 
   > > I believe the story is that @comphead plans to fix this in a follow on 
PR. Is that accurate @comphead ?
   > 
   > @alamb This comment of mine was on an original version of this PR which 
tried to address the issue by weakening the compatibility check; @comphead 
followed the suggestion in the comment to rewrite the fix by changing the 
analyzer instead -- so all is good!
   > 
   > Note: for the case of LEFT join, the right side must be nullified (that's 
what the comment talks about). A follow on PR will handle RIGHT and FULL OUTER 
joins where the left side will have to be adjusted as well.
   > 
   > -- Michael
   
   Right, for RIGHT/FULL OUTER joins I will create a follow up PR. This one is 
too overloaded :) 


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