By the end of this chapter you will be able to:

You will also learn how to use an internal variable, _pipeName.

In this exercise you will produce a single list of updates to customers' Cable TV packages. Customers can update their packages both through a customer care system and in shops. You will bring all these updates together into a single list.

Read in data sets from files

For this exercise you need two files from the zip file you downloaded in  2 Using Excel Templates, step 5. The files contain updates from the two sources: the customer care system and the shop.

• <path>\train\inputData\ChannelPackages\CustomerCareUpdates\CustomerCareUpdates.txt
• <path>\train\inputData\ChannelPackages\ShopUpdates\ShopUpdates.txt

1. Create a new model with the Name, Channel Package Check.
2. Add a file collector to your model and load the data as follows:
   1. From the model toolbar, drag a 

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       into the model.
   2. PhixFlow displays the settings tab for the new file collector. Set the Name to Customer Care Updates.
   3. In the model, hover your mouse pointer over the Channel Package Check file collector to display the context toolbar and click 

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      .
   4.  Navigate to the directory <path>\train\inputData\ChannelPackages\CustomerCareUpdates.
   5. Select the file CustomerCareUpdates.txt, click Open, then click

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      .
   6. PhixFlow adds a new stream table to the model, called CustomerCareUpdate CustomerCareUpdates.
   7. In the model, hover over the new CustomerCareUpdates stream table and click  

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   8. Check the data is loaded. There should be 8 lines of data, with columns for Customer Ref, Sales Date and Package.
   9. Now the data is loaded into the streamtable, set the stream table to 

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       .
3. Add another file collector to your model and repeat the process described in step 2. This above, this time:
   1. Set the file collector Name to Shop Updates.
   2. Upload <path>\train\inputData\ChannelPackages\ShopUpdates\ShopUpdates.txt.
   3. PhixFlow loads 7 rows of data to this streamtable.
   4. Remember to set the steam to table to 

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      .

Screenshot of the Channel Package Check model so far:

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Combine the data sets

1. Create a new stream table in your model and populate its attributes.:
   1. Hover over CustomerCareUpdates and click 

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      .
   2. In the settings, set the Name to  Combined Updates.
   3. In the model, show the stream table attributes for CustomerCareUpdates .
   4. Select all the attributes and drag them into the properties for the Combined Updates stream table. Drop them into the Attributes section.
   5. Click 

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      .
2. To save your model, in the model toolbar click 

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   . 
3. Connect the ShopUpdates stream  table to the Combined Updates stream. table:
   1. Hover over ShopUpdates and click 

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      .

   2. Click Combined Updates to link the pipe to the streamtable.

      Info
      When you connect streamstables, PhixFlow automatically adds a reference to the input pipe name. This appears in the attribute expression. To merge this data successfully,  you must update the attribute expressions to remove the in. prefix; see step 4 below.

      
      

4. Fix all the attribute expressions.
   1. Double-click on Combined Updates to open its settings tab. For each attribute:
   2. In the Attributes section, double-click on an attribute to open its settings.
   3. In the Basic Settings section, edit the Expression to remove in. and click 

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5. In the Combined Updates stream table settings tab, click 

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    to save and close.
6. In the model, hover your mouse pointer over Combined Updates and click 

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   .
7. When the stream table has run, check that the stream table has:
   • the columns CustomerRef, Sales Date and Package
   • 15 rows
   • all cells have data.
     The stream default view:
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Snapshot of the Chanel Package Check model so far:

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Record the source for each update

You will now update your settings to record the source for each update, in the set of combined updates. To do this:

1. To update the name of the pipe from the CustomerCareUpdates stream table to the Combined Updates stream table:
   1. In the model, click on the pipe to open its settings tab.
   2. Set Name to CC.
   3. Click 

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       to save and close the pipe settings.
2. Update the name of the pipe from the ShopUpdates file collector to the ShopUpdates stream table.
   
   1. In the model, click on the pipe to open its settings tab.
   2. Set Name to shop
   3. Click 

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       to save and close pipe settings.
3. Double-click the stream table Combined Updates to open its settings tab.
4. In the Attributes section, click

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    add a new attribute and set:
   1.  Name: Source.

   2. Expression:

      Code Block
      if (_pipeName == "CC", "Customer Care" , "Shop" )

      
      

   3. Click 

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       to save and close the attribute settings.
5. To make Source the first attribute in the streamtable, drag it to the top of the attributes list.
6. Click 

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    to save and close the stream table settings.
7. Run analysis on Combined Updates.
8. Check the output data set and make sure that the source has been recorded on each record correctly.