Jefffrey commented on PR #18137:
URL: https://github.com/apache/datafusion/pull/18137#issuecomment-3565499853

   > > > I was actually thinking we need to delegate the execution to 
array_concat if input is arrays rather than implementing it again
   > > 
   > > 
   > > @EeshanBembi did you look into the feasibility of this suggestion?
   > 
   > Hey @Jefffrey , I implemented delegating the execution to use array_concat!
   
   I'm still having trouble seeing how this is happening in the PR 🤔 
   
   From what I can see, the code to handle concat of arrays is still entirely 
new (or perhaps copied as is). In my mind I was thinking something along the 
lines of using `simplify` to convert the function to the array concat version, 
instead of duplicating that code here. But I haven't got hands on with this yet 
so perhaps there is some sort of limitation that prevents this?


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