Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/12117#discussion_r58301788
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
---
@@ -491,40 +528,31 @@ class SessionCatalog(
}
/**
- * Rename a function.
- *
- * If a database is specified in `oldName`, this will rename the
function in that database.
- * If no database is specified, this will first attempt to rename a
temporary function with
- * the same name, then, if that does not exist, rename the function in
the current database.
- *
- * This assumes the database specified in `oldName` matches the one
specified in `newName`.
- */
- def renameFunction(oldName: FunctionIdentifier, newName:
FunctionIdentifier): Unit = {
--- End diff --
Users cannot rename a function (no API exposed). So, I just delete it.
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