Working with Router Transformation and Aggregator Transformation

Solution

1. Import Items, Orders, Order-Items and Stores tables from the database. 
2. Calculate order amount for each order for each store.
3. Route the output based on store_id and load the data in different tables created for each store.
4. Retrieve store wise order details.

Create a Mapping

I. Create Sources and Targets

1. Import source tables from the database (Items, Orders, Order-Items and Stores).
2. Create three target tables as shown below and name them as follows.

• Tgt_KAUAIFRANCHISE_x
• Tgt_MAUIFRANCHISE_x
• Tgt_OAHUFRANCHISE_x

The ports in all three target tables are as shown below

II. Drag Sources and Targets into the Mapping

1. Drag all the source tables into the Mapping Designer.
2. Create the Source Qualifier transformation and link the sources to the transformation.

III. Create an Aggregator Transformation

1. Drag all columns from Source qualifier into the transformation and group on Store_id and Order_id.
2. Create an output port ORDER_AMOUNT.
3. Create the expression: SUM(PRICE * QUANTITY - DISCOUNT)
4. Change PRICE, QUANTITY and DISCOUNT to input ports only.

IV. Create a Router Transformation

1. To create a Router transformation

• Select TRANSFORMATION | CREATE and select Router from the drop down, or
• Click the icon from the Transformation toolbar. 

The router transformation will generate three groups : Kauai, Maui, Oahu and a default group.

Link columns from each group to the respective targets. For example, the ports under the Kauai group are linked to the Tgt_KAUAIFRANCHISE_x target. This target table contains the order details for the store where store id = 2014.

V. Load the Target

1. Create a Workflow with the name wf_StoresOrders_x.
2. Create a session task with the name s_StoresOrders_x.
3. Run the Workflow.
4. Monitor the Workflow.
5. Verify the results for target table Tgt_KAUAIFRANCHISE_x, Tgt_MAUIFRANCHISE_x, Tgt_OAHUFRANCHISE_x