LakshSingla commented on PR #15020:
URL: https://github.com/apache/druid/pull/15020#issuecomment-1734217183

   Let's note this comment somewhere as the assumption while optimizing the 
filter. This might not be intuitive for someone who is just messing with that 
part of the code, and since its implicitly baked into the code, it would be 
good to add it as a comment. 
   
   Also, if we can, then let's add a check that there is no multiple nesting of 
the filtered data sources. 
   This shouldn't take extra runtime, and at the cost of increased code 
complexity, we make sure that the queries don't silently pass with incorrect 
pruning like earlier. 


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