Ali Afroozeh created SPARK-28716:
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             Summary: Add id to Exchange and Subquery's stringArgs method for 
easier identifying their reuses in query plans
                 Key: SPARK-28716
                 URL: https://issues.apache.org/jira/browse/SPARK-28716
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.4.3
            Reporter: Ali Afroozeh


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=#[id=#$id]] }}

Where {{2710}} is the id of the reused exchange.



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