dssysolyatin commented on PR #4620:
URL: https://github.com/apache/calcite/pull/4620#issuecomment-3545998626

   I’m okay to merge this PR if:
   
   1 The specifications for `RelShuttle` methods will be clearly defined. Right 
now, it has visitors for both `org.apache.calcite.rel.core` (two of them) and 
`org.apache.calcite.rel.logical` (the rest).
   2. The test that @xiedeyantu mentioned (which was actually a very good 
suggestion) is written based on this specification. 
   
   This will help us avoid forgetting new visit methods and ensure all existing 
methods work correctly, so any breaking changes will happen in only one 
release. It doesn’t matter to me if it is a separate Jira/PR or not


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