Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22237#discussion_r223700226
--- Diff: docs/sql-programming-guide.md ---
@@ -1890,6 +1890,10 @@ working with timestamps in `pandas_udf`s to get the
best performance, see
# Migration Guide
+## Upgrading From Spark SQL 2.4 to 3.0
+
--- End diff --
shall we update the guide too?
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