2010YOUY01 commented on issue #18976:
URL: https://github.com/apache/datafusion/issues/18976#issuecomment-3588255448

   Just to provide a bit of background:
   
   Suppose we have a Parquet file with an existing sort order of event_time ASC.
   Now we want to benchmark workloads that read the tail of the file using a 
query such as:
   ```sql
   select *
   from t
   order by event_time desc
   limit 10
   ```
   
   This is used to evaluate the optimizations in the linked issue/PRs.


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