Parameter

The Parameter processor retrieves parameters from one input and applies them to another flow. This allows flows to be developed and reused with different sets of parameters. Parameters can be maintained independent of the flows.

To understand the interaction of parameters, we need to understand the sequence of a flow. When we want to view data from a Result, the request is sent from the Result back up the flow to the source or sources. The source(s) then push the records back down the flow to the Result. The Parameter processor intercepts the original request as it travels up the flow and inserts the necessary parameter values. These are then available to processors further up the flow (towards the source). With this understanding, we can see that Parameter processors are often used close to the Result-end of the flow, so that they can propagate parameters to all upstream processors.

Add Parameter

To add a Parameter processor, select the button on the menu bar and click on the location in the designer diagram. Use the Flow connector to connect the Parameter processor and another processors together.

In DataSource1, select the desired field(s) as the lookup parameter(s). The lookup parameters will be used to lookup records in DataSource2.

Edit Concat

There are two ways to access a Parameter processor.

• Double-click on the processor
• Right-click on the processor and select “Properties” option from the pop-up menu

To edit a Parameter processor, right-click and select “Properties” or double-click on the processor to display “Parameter Wizard”.

The “Iterate” field when selected allows you to propagate parameters to all upstream processors. By default, it is not selected.

Delete Concat

To remove a Parameter processor from the designer diagram, select the desired Parameter processor, then either:

• Click on the “delete” key on your keyboard
• Right-click on display the pop-up menu and select the “Delete Graphic” option

Pop-up Menu

Right-click on the Concat processor and a pop-up menu will appear.

There are three functions in the pop-up menu:

Function	Description
Properties	Launches the Parameter Wizard that allows you to edit the “Iterate” field.
View Output	Switches to the “Data” tab, which displays the records after the lookup operation.
Delete Graphic	Deletes the Parameter processor.