LucaCanali opened a new pull request #26519: [SPARK-29894][SQL][WEBUI] Add Codegen Stage Id to Spark plan graphs in Web UI SQL Tab URL: https://github.com/apache/spark/pull/26519 ### What changes were proposed in this pull request? The Web UI SQL Tab provides information on the executed SQL using plan graphs and by reporting SQL execution plans. Both sources provide useful information. Physical execution plans report Codegen Stage Ids. This PR adds Codegen Stage Ids to the plan graphs. ### Why are the changes needed? It is useful to have Codegen Stage Id information also reported in plan graphs, this allows to more easily match physical plans and graphs with metrics when troubleshooting SQL execution. Example snippet to show the proposed change: https://issues.apache.org/jira/secure/attachment/12985837/snippet__plan_graph_with_Codegen_Stage_Id_Annotated.png Example of the current state: https://issues.apache.org/jira/secure/attachment/12985838/snippet_plan_graph_before_patch.png ### Does this PR introduce any user-facing change? This PR adds Codegen Stage Id information to SQL plan graphs in the Web UI/SQL Tab. ### How was this patch tested? Added a test + manually tested
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