[jira] [Created] (SPARK-47289) Allow extensions to log extended information in explain plan

["Parth Chandra (Jira)" <ji...@apache.org>]

Parth Chandra created SPARK-47289:
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             Summary: Allow extensions to log extended information in explain plan
                 Key: SPARK-47289
                 URL: https://issues.apache.org/jira/browse/SPARK-47289
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 4.0.0
            Reporter: Parth Chandra


With session extensions, Spark planning can be extended to apply additional rules and modify the execution plan. If an extension replaces a node in the plan, the new node will be displayed in the plan. However, it is sometimes useful for extensions provided extended information to the end user to explain the impact of the extension. For instance an extension may automatically enable/disable some feature that it provides and can provide this extended information in the plan. 
The proposal is to optionally turn on extended plan information from extensions. Extensions can add additional planning information via a new interface that internally uses a new TreeNodeTag, say 'explainPlan'.



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