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[SPARK-33911][SQL][DOCS][2.4] Update the SQL migration guide about changes in HiveClientImpl #30933

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[SPARK-33911][SQL][DOCS][2.4] Update the SQL migration guide about changes in HiveClientImpl #30933

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6 changes: 6 additions & 0 deletions docs/sql-migration-guide-upgrade.md
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Expand Up @@ -7,6 +7,12 @@ displayTitle: Spark SQL Upgrading Guide
* Table of contents
{:toc}

## Upgrading from Spark SQL 2.4.7 to 2.4.8

- In Spark 2.4.8, `AnalysisException` is replaced by its sub-classes that are thrown for tables from Hive external catalog in the following situations:
* `ALTER TABLE .. ADD PARTITION` throws `PartitionsAlreadyExistException` if new partition exists already
* `ALTER TABLE .. DROP PARTITION` throws `NoSuchPartitionsException` for not existing partitions

## Upgrading from Spark SQL 2.4.5 to 2.4.6

- In Spark 2.4.6, the `RESET` command does not reset the static SQL configuration values to the default. It only clears the runtime SQL configuration values.
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