16.20 - SQL UDFs and SQL Cursors - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Detailed Topics

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Release Date
March 2019
Content Type
Programming Reference
Publication ID
B035-1184-162K
Language
English (United States)

You can invoke SQL UDFs from within an SQL cursor. The rules for invoking an SQL UDF from within a cursor are the same as those for any other expression specified within an SQL cursor (see Teradata Vantage™ SQL Stored Procedures and Embedded SQL , B035-1148 for details).

This example invokes an SQL UDF in the WHERE clause of a SELECT request in a cursor.

DECLARE ex1 CURSOR FOR
  SELECT *
  FROM t1
  WHERE df2.common_value_expression(t1.a1, t1.b1) > 1
  ORDER BY t1.a1;

This example invokes an SQL UDF in an UPDATE request in a cursor.

DECLARE ex3 CURSOR FOR
  UPDATE t1 SET b1 = df2.common_value_expression(t1.a1, t1.b1)
  WHERE c1 > 10;