cloud-fan 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_r402086061
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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:
We only add a migration guide if we change behavior BY DEFAULT.
We can mention it in release notes though, to promote this feature.
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