IgorBerman commented on PR #31754:
URL: https://github.com/apache/spark/pull/31754#issuecomment-2064149586

   this change might create confusion when looking at TreeNode.sql()
   currently columns are not always have backticks
   i.e. instead of `column`.`nestedColumn` we will have column.`nestedColumn`
   so currently there is no difference between this and 
tableName.`nestedColumn` i.e. not clear if column is qualifier or column
   I'm not sure what ANSI says regarding this.
   


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