You can use an expression parameter to define a group filter. An expression parameter is a parameter that contains a complete expression.
For example, an expression parameter might contain the expression
Employee_Salary > 1000
.
To parameterize the group filter, choose
New Parameter
in the
Group Filter Condition
field of the
Groups
tab. Define the parameter and enter the expression on the Expression Editor. An expression parameter cannot contain other parameters.
The following image shows the
Groups
tab in the transformation properties:
When you use an expression parameter, the Developer tool cannot validate the expression. If the expression is not valid at run time, the mapping might fail.