You can filter the values for each field in a VALUE or OUTER_VALUE test to exclude rows that do not satisfy the test condition. For example, you want to exclude telephone extension numbers that contain fewer than three characters. Apply the following conditions to the VALUE test:

Table A.EXT = Table B.EXT
Condition A =
LENGTH(EXT)<3
Condition B =
LENGTH(EXT)<3

The filter condition you enter for a test differs from the WHERE clause you enter for a table pair. Data Validation Option applies the WHERE clause to all tests in the table pair, before it joins the tables. It applies the test filter condition after it joins the tables. You might want to use a test filter condition instead of a filter condition in the WHERE clause when the filter condition does not remove a large percentage of rows. This can improve performance if you run one test on the table pair.

Data Validation Option does not check the condition syntax. Any valid PowerCenter expression, including expressions that use PowerCenter functions, is allowed. If the PowerCenter syntax is not valid, a mapping installation error occurs when you run the test.

To enter a filter condition for either field, enter the filter condition in the

Condition A

or

Condition B

field. Because the PowerCenter Integration Service processes the filter condition, it must use valid PowerCenter syntax. Enter the field name in the filter condition, for example, Emp_ID > 0. Do not include the WHERE keyword.