alamb commented on issue #19487:
URL: https://github.com/apache/datafusion/issues/19487#issuecomment-3751729661

   > With a _very_ brief search, I wasn't able to find if datafusion regularly 
computes statistics for batches (are batches and micro partitions 1-1?) or if 
there is a default algorithm for various non-numeric data types.
   
   It does not compute statistics for RecordBatches
   
   It computes statistics at planning time for Partition (basically entire 
ExecutionPlans, possibly partitioned by value)
   
   


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