mapleFU commented on PR #37469:
URL: https://github.com/apache/arrow/pull/37469#issuecomment-1714301521

   > That is indeed what you were saying as the test shows! That behaviour 
strikes me as quite unintuitive!
   
   Cause I'm the author of that behavior lol
   
   When disable collect statistics, currently it would be hard to collect the 
`ColumnIndex`, because `ColumnIndex` relies on `Statistics`.
   
   Also, by the way, by default, if column index is enabled, the page header 
statistics will not be written. (Since spec says if column index exists, page 
header is not tent to be written)
   


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