Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/19649#discussion_r149845572
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/events.scala
---
@@ -62,6 +62,16 @@ case class DropDatabasePreEvent(database: String)
extends DatabaseEvent
case class DropDatabaseEvent(database: String) extends DatabaseEvent
/**
+ * Event fired before a database is altered.
+ */
+case class AlterDatabasePreEvent(database: String) extends DatabaseEvent
--- End diff --
Sure, I will update the title.
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