dwsmith1983 commented on PR #5867:
URL: 
https://github.com/apache/datafusion-comet/pull/5867#issuecomment-5779025979

   > Are you and @LinSimon-901101 happy for this one to carry that too?
   
   Yes. This pull request already routes `map_from_arrays` through the 
dispatcher and rewrites `map_from_arrays_dedup_policy.sql` the same way, so 
#5844's remaining pieces can rebase on top like #5875's. On Spark 3.4.3 the 
LAST_WIN fixture here reads its arrays from parquet with the nested vectorized 
reader left at its default, and the 3.4 run you did came back green, so the 
data avoids SPARK-48019.
   
   > Could you cite those numbers here and say plainly that the lookup-only 
regression is accepted in exchange for keeping the projection in Comet?
   
   Added to the description under a Performance heading, with the 65,536-row 
figures from #5875 and the tradeoff stated as you put it.
   
   The four inline points are addressed in 0d61cac1e, with a reply on each 
thread. The SQL file suite passes on Spark 3.5 with the new column-fed 
`arrays_zip` query, and the regenerated compatibility guide shows the reworded 
reasons and the new `array_append` note.
   


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