You can define an expression parameter that contains a join condition. You can choose the parameter as the join condition in the Joiner transformation.
To use a parameter for the join condition, select the parameter condition type on the Join tab.
The following image shows where to select the parameter condition type:
You can browse for an existing parameter or you can create a parameter. To create a parameter, click
New
and define the parameter. Create the expression in the expression editor.
An expression parameter cannot contain other parameters. If you embed a parameter in an expression parameter, the Data Integration Service issues a runtime validation error.