Renames either the overloaded calling function name or specific function name for an external function.
You must have both of the following privileges to rename an external UDF.
- DROP FUNCTION on the external UDF or its containing database.
- CREATE FUNCTION on the database that contains the external UDF.
If the function is a row-level security UDF, you must also have the CONSTRAINT DEFINITION privilege to execute RENAME FUNCTION.
Before renaming a row-level security UDF, you must use ALTER CONSTRAINT to drop or replace the UDF in any CONSTRAINT objects that specify the UDF.