zhannngchen commented on PR #11205:
URL: https://github.com/apache/doris/pull/11205#issuecomment-1195385680

   @EmmyMiao87 can you help to review the code change of Planer?
   Basically,  when user enabled unique key merge-on-write, we don't need to 
merge the data with same keys to ensure which row is latest, old row is marked 
as deleted in DeleteBitmap. So we can enable pre-aggregation to accelerate the 
query execution, just like processing data in duplicate keys table.


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