maropu commented on a change in pull request #30156: URL: https://github.com/apache/spark/pull/30156#discussion_r512695698
########## File path: docs/sql-migration-guide.md ########## @@ -49,6 +49,8 @@ license: | - In Spark 3.1, we remove the built-in Hive 1.2. You need to migrate your custom SerDes to Hive 2.3. See [HIVE-15167](https://issues.apache.org/jira/browse/HIVE-15167) for more details. - In Spark 3.1, loading and saving of timestamps from/to parquet files fails if the timestamps are before 1900-01-01 00:00:00Z, and loaded (saved) as the INT96 type. In Spark 3.0, the actions don't fail but might lead to shifting of the input timestamps due to rebasing from/to Julian to/from Proleptic Gregorian calendar. To restore the behavior before Spark 3.1, you can set `spark.sql.legacy.parquet.int96RebaseModeInRead` or/and `spark.sql.legacy.parquet.int96RebaseModeInWrite` to `LEGACY`. + + - In Spark 3.1, when `spark.sql.legacy.transformationPadNullWhenValueLessThenSchema` is true, Spark will pad NULL value when scrip transformation's output value size less then schema size in default-serde mode. If false, we will keep behavior as before. Review comment: Could you describe what's `behavior as before`? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
