Rich-T-kid commented on issue #9136:
URL: https://github.com/apache/arrow-rs/issues/9136#issuecomment-5397577927

   @Dandandan I believe this issue is closed by 
https://github.com/apache/arrow-rs/pull/9755/changes it implements  
`copy_rows_by_filter` for primitive types -> 
https://github.com/apache/arrow-rs/pull/9755/changes#diff-8a6fd525b04e9dc9c4fd8a9713ad6fc8fcb90b0218ba89470106ac3e95d983a5R183
 which writes the filtered array directly to `InProgressPrimitiveArray.current` 
which is the output. this is 1 copy which is inevitable. 


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