aho135 commented on PR #20314:
URL: https://github.com/apache/druid/pull/20314#issuecomment-5781373712

   @FrankChen021 I reverted propagation of the Cancel flag to the HepPlanner 
that was suggested 
[here](https://github.com/apache/druid/pull/20314#discussion_r3979110367). The 
code there didn't seem very clean since there was quite of bit of duplication 
with Calcite code. In my own testing with large IN clauses the planning time 
was dominated by the VolcanoPlanner. Curious if you've seen planning 
bottlenecks in the past in the HepPlanner that would justify the additional 
code.


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