venkata91 commented on PR #4928:
URL: https://github.com/apache/calcite/pull/4928#issuecomment-4433264481

   > I personally would not mind implementing all of them and documenting the 
breaking change. That's how it's supposed to work. If the upgrade path for 
users is not difficult, we should describe it for users in the release notes.
   > 
   > However, Calcite uses semantic versioning, so this kind of change should 
be officially prohibited. But I don't see any Calcite 2.0 release on the 
horizon, so I don't think this can be postponed indefinitely.
   
   Okay in that case, let me fix it for the other Nodes as well `LogicalWindow` 
and `LogicalSnapshot` and add a test to prevent it from getting missed later. 
But this doesn't prevent users from using `instanceof` approach later right 
even after we document this as a breaking change in `Release Notes`?


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