namanjain24-sudo commented on PR #25527:
URL: https://github.com/apache/datafusion/pull/25527#issuecomment-6452314698

   Apologies for the stray comment — a benchmark report meant for a different 
repository that I posted here by mistake. Removing it; please ignore the 
notification.
   
   On the PR itself: closing it as I said I would. @alexandrefimov, thank you 
for the two rounds of review — the unregistered `equal` anchor and the old-plan 
regression were both real, and the switch to `SwitchExpression` came directly 
out of that. @alamb, the size objection was fair; this ended up bigger than the 
bug warrants.
   
   The underlying mismatch is still there (Substrait's trailing column is a 
grouping-set index, DataFusion's `__grouping_id` is a bitmask), so I've left 
the analysis and the tests on the branch for anyone who wants them. Happy to 
reopen, or to split it consumer-first, if a Substrait maintainer ever wants to 
pick it up.
   


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