peter-toth commented on PR #8891:
URL: 
https://github.com/apache/arrow-datafusion/pull/8891#issuecomment-1937619683

   In the last few commits:
   - I unified "transform" traversal logics of `transform_down`, 
`transform_up`, `transform`, `rewrite` with the help of macros.
   - Fixed `Jump` behaviour in "visit" and "transform" traversals and added 
tests for it
   - Added docs to important macros and functions
   - Added consitent parameter names in all APIs
   
   I hope the above makes the current state clear and useful, just let me know 
if you have any questions.
   
   I did not touch the base of "visit" and "transform" APIs 
(`TreeNode::apply_children()` / `TreeNode::map_children()`). Please feel free 
to suggest changes in comments or PRs to further refine the PR.


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