[GitHub] [spark] cloud-fan opened a new pull request #24626: [SPARK-27747][SQL] add a logical plan link in the physical plan

[GitBox <gi...@apache.org>]

cloud-fan opened a new pull request #24626: [SPARK-27747][SQL] add a logical plan link in the physical plan
URL: https://github.com/apache/spark/pull/24626
 
 
   ## What changes were proposed in this pull request?
   
   It's pretty useful if we can convert a physical plan back to a logical plan, e.g., in https://github.com/apache/spark/pull/24389
   
   This PR introduces a new feature to `TreeNode`, which allows `TreeNode` to carry some extra information via a mutable map, and keep the information when it's copied.
   
   The planner leverages this feature to put the logical plan into the physical plan.
   
   ## How was this patch tested?
   
   a test suite that runs all TPCDS queries and checks that some common physical plans contain the corresponding logical plans.

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