dbaliafroozeh opened a new pull request #25434: [SPARK-28716] Add id to 
Exchange and Subquery's stringArgs method for easier identifying their reuses 
in query plans
URL: https://github.com/apache/spark/pull/25434
 
 
   ## What changes were proposed in this pull request?
   
   Add id to Exchange and Subquery's stringArgs method for easier identifying 
their reuses in query plans, for example:
   ```
   ReusedExchange d_date_sk#827, BroadcastExchange 
HashedRelationBroadcastMode(List(cast(input[0, int, true] as bigint))) 
[id=#2710] 
   ```
   Where `2710` is the id of the reused exchange.
   
   ## How was this patch tested?
   
   (Please explain how this patch was tested. E.g. unit tests, integration 
tests, manual tests)
   (If this patch involves UI changes, please attach a screenshot; otherwise, 
remove this)
   
   Please review https://spark.apache.org/contributing.html before opening a 
pull request.

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