andygrove commented on issue #5586:
URL: 
https://github.com/apache/datafusion-comet/issues/5586#issuecomment-5981492343

   Closing this as not planned. Since it was filed, #5766 made the codegen 
dispatcher decline structs with repeated field names, so mixing 
`CodegenDispatchFallback` into `CometCreateNamedStruct` would no longer route 
these through the dispatcher. Main now declines duplicate-name structs wherever 
they would reach Java Arrow, and the enclosing operator falls back to Spark. 
Running them in Comet would need the Arrow boundary changes from #5603, which 
we decided not to take on (see the closing comment there). The cases that still 
fail are tracked in #6251, #6591 and #6592.
   
   Thanks @RRXXZZYY for picking this up and for all the work in #5603.
   


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