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English
  • Common Content for Data Engineering 10.4.0
  • All Products

Table of Contents

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  1. Preface
  2. Mappings
  3. Mapplets
  4. Mapping Parameters
  5. Where to Assign Parameters
  6. Mapping Outputs
  7. Generate a Mapping from an SQL Query
  8. Dynamic Mappings
  9. How to Develop and Run a Dynamic Mapping
  10. Dynamic Mapping Use Cases
  11. Mapping Administration
  12. Export to PowerCenter
  13. Import From PowerCenter
  14. Performance Tuning
  15. Pushdown Optimization
  16. Partitioned Mappings
  17. Developer Tool Naming Conventions

Developer Mapping Guide

Developer Mapping Guide

Back Next

Step 3. Configure the Exp_Output Expression Transformation

Step 3. Configure the Exp_Output Expression Transformation

Add an Expression transformation Exp_Output to the mapping. Create a dynamic port to get the output ports from the Exp_TRIM transformation. Create another dynamic port to get the ports from the Read transformation and define input rules to include only the unused ports.
  1. From the Exp_TRIM transformation, drag the
    DynamicTrim
     dynamic port to the All Ports group in the Exp_Output transformation.
    The Developer tool creates a dynamic port
    DynamicTrim
     in the Exp_Output transformation.
  2. From the Read_Customer_FF transformation, drag the All Ports group to the All Ports group in the Exp_Output transformation.
    The Developer tool creates a dynamic port
    From_Read_Customer_FF
     in the Exp_Output transformation.
    The following image shows the two dynamic ports in the Exp_Output transformation.
    The mapping contains a Read transformation and two Expression transformations. The Exp_TRIM transformation has a dynamic port to receive columns from the Read transformation and a dynamic output port. The Exp_Output transformation has a dynamic port to receive columns from the dynamic output port in the Exp_TRIM transformation and another dynamic port to receive columns from the Read transformation.
  3. Right-click the From_Read_CUSTOMER_FF dynamic port, and select
    Edit Input Rules
    .
    The
    Input Rules
     dialog box appears.
  4. Click the
    New
     icon to add an input rule.
  5. Select
    Exclude
     in the
    Operator
     column.
  6. Select
    Type
     in the
    Selection Criteria
     column.
  7. Click the
    Details
     arrow to select the data type you want to include.
  8. In the
    Input Rule Detail: By Type
     dialog box, select
    string
     data type from the list.
  9. Verify the
    Port Preview
     area to ensure that string ports do not appear.
    The following image shows the updated input rule and the ports in the
    Port Preview
     area of the
    Input Rule
     dialog box:
    In the Input Rules dialog box for the From_Read_CUSTOMER_FF dynamic port, add an input rule to exclude ports of type string.
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