Example: Invoking an SQL UDF From a Derived Table - Teradata Database - Teradata Vantage NewSQL Engine

This example invokes the SQL UDF value_expression in the select list of the derived table dt.

     SELECT *
     FROM (SELECT a1, test.value_expression(3,4), c1
           FROM t1
           WHERE a1>b1) AS dt (a,b,c);

This example invokes the SQL UDF value_expression in the WHERE clause of the derived table dt.

     SELECT *
     FROM (SELECT a1, b1, c1
           FROM t1
           WHERE test.value_expression(b1,c1)>10) AS dt (a,b,c);