[GitHub] [spark] maropu commented on a change in pull request #28097: [SPARK-31325][SQL][Web UI] Control a plan explain mode in the events of SQL listeners via SQLConf

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maropu commented on a change in pull request #28097: [SPARK-31325][SQL][Web UI] Control a plan explain mode in the events of SQL listeners via SQLConf
URL: https://github.com/apache/spark/pull/28097#discussion_r402081054
 
 

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 File path: docs/sql-migration-guide.md
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 @@ -23,8 +23,11 @@ license: |
 {:toc}
 
 ## Upgrading from Spark SQL 3.0 to 3.1
+
   - Since Spark 3.1, grouping_id() returns long values. In Spark version 3.0 and earlier, this function returns int values. To restore the behavior before Spark 3.0, you can set `spark.sql.legacy.integerGroupingId` to `true`.
 
+  - Since Spark 3.1, the `formatted` query explain mode is used in the events (e.g., `SparkListenerSQLExecutionStart` and `SparkListenerSQLAdaptiveExecutionUpdate`) of SQL listeners. To restore the behavior before Spark 3.0, you can set `spark.sql.queryDescriptionModeInListeners` to `extended`.
 
 Review comment:
   Ur, yea. I added this because I thought user applications could listen to `SparkListenerSQLExecutionStart` and this PR changed the content in the event. But, I don't have a strong opinion on this, so I'll remove it.

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