SQL UDF Function Examples | Teradata Vantage - Example: Defining the Function and Query - Advanced SQL Engine - Teradata Database

Consider the following function definition and query:

   CREATE FUNCTION Test.MyUDF (a INT, b INT, c INT)
   RETURNS INT
   LANGUAGE SQL
   CONTAINS SQL
   DETERMINISTIC
   SQL SECURITY DEFINER
   COLLATION INVOKER
   INLINE TYPE 1
   RETURN a + b - c;
   SELECT Test.MyUDF(t1.a1, t2.a2, t3.a3) FROM t1, t2, t3;

The user executing the SELECT statement must have the following privileges:

• SELECT privilege on tables t1, t2, and t3, their containing databases, or on the columns t1.a1, t2.a2, and t3.a3.
• EXECUTE FUNCTION privilege on MyUDF or on the database named Test.

The privileges of the creator or owner are not checked since the UDF does not reference any database objects in its definition.