ulysses-you commented on a change in pull request #28840:
URL: https://github.com/apache/spark/pull/28840#discussion_r442622091
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
##########
@@ -1341,6 +1341,16 @@ class SessionCatalog(
functionRegistry.registerFunction(func, info, builder)
}
+ /**
+ * Unregister a temporary or permanent function from a session-specific
[[FunctionRegistry]]
+ */
+ def unregisterFunction(name: FunctionIdentifier, ignoreIfNotExists:
Boolean): Unit = {
Review comment:
Not used. If the function not exists, `refresh function` will throw
exception.
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