Ted-Jiang commented on issue #4398:
URL: 
https://github.com/apache/arrow-datafusion/issues/4398#issuecomment-1328987954

   > we do not buffer the predicate column in memory after we have generated 
the selection
   Yes just like you mentioned it is an exact filter.
   > Would this be accomplished by simply making the filter pushdown exact?
   Sounds like a reasonable solution,seems miss this part in row filter.


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