mapleFU commented on PR #41546:
URL: https://github.com/apache/arrow/pull/41546#issuecomment-2096069246

   Sure, I can add it for this case(DeltaLengthByteArrayEncoder statistics) . 
However these value is "estimated", we use this during set a page-size-limit 
and check if limit exceeds. How could I elaborate the number since it could be 
larger or smaller than the values? ( it's smaller than exact values for dict + 
byte-array, and this doesn't affect the `ColumnStats` in parquet)


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