Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/22979#discussion_r232486778
--- Diff: docs/sql-migration-guide-upgrade.md ---
@@ -9,6 +9,8 @@ displayTitle: Spark SQL Upgrading Guide
## Upgrading From Spark SQL 2.4 to 3.0
+ - Since Spark 3.0, to parse decimals in locale specific format from CSV,
set the `locale` option to proper value.
--- End diff --
While we are here, let's format the migration guide item format as others.
like ..
In Spark version 2.4 and earlier, it only deals with locale specific
decimal notation like `,`. Since Spark 3.0, the locale can be set by `locale`
and default locale is ....
Please feel free to change as you think is righter
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