Table of Contents

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  1. Preface
  2. Working with Transformations
  3. Aggregator Transformation
  4. Custom Transformation
  5. Custom Transformation Functions
  6. Data Masking Transformation
  7. Data Masking Examples
  8. Expression Transformation
  9. External Procedure Transformation
  10. Filter Transformation
  11. HTTP Transformation
  12. Identity Resolution Transformation
  13. Java Transformation
  14. Java Transformation API Reference
  15. Java Expressions
  16. Java Transformation Example
  17. Joiner Transformation
  18. Lookup Transformation
  19. Lookup Caches
  20. Dynamic Lookup Cache
  21. Normalizer Transformation
  22. Rank Transformation
  23. Router Transformation
  24. Sequence Generator Transformation
  25. Sorter Transformation
  26. Source Qualifier Transformation
  27. SQL Transformation
  28. Using the SQL Transformation in a Mapping
  29. Stored Procedure Transformation
  30. Transaction Control Transformation
  31. Union Transformation
  32. Unstructured Data Transformation
  33. Update Strategy Transformation
  34. XML Transformations

Transformation Guide

Transformation Guide

Lookup Ports

Lookup Ports

The Ports tab contains input and output ports. The Ports tab also includes lookup ports that represent columns of data to return from the lookup source. An unconnected Lookup transformation returns one column of data to the calling transformation in this port. An unconnected Lookup transformation has one return port.
The following table describes the port types in a Lookup transformation:
Ports
Type of Lookup
Description
I
Connected
Unconnected
Input port. Create an input port for each lookup port you want to use in the lookup condition. You must have at least one input or input/output port in each Lookup transformation.
O
Connected
Unconnected
Output port. Create an output port for each lookup port you want to link to another transformation. You can designate both input and lookup ports as output ports. For connected lookups, you must have at least one output port. For unconnected lookups, select a lookup port as a return port (R) to pass a return value.
L
Connected
Unconnected
Lookup port. The Designer designates each column in the lookup source as a lookup (L) and output port (O).
R
Unconnected
Return port. Use only in unconnected Lookup transformations. Designates the column of data you want to return based on the lookup condition. You can designate one lookup port as the return port.
The Lookup transformation also enables an associated expression property that you configure when you use a dynamic cache. The associated expression property contains the data to update the lookup cache. It can contain an expression to update the dynamic cache or it can contain an input port name.
Use the following guidelines to configure lookup ports:
  • If you delete lookup ports from a flat file lookup, the session fails.
  • You can delete lookup ports from a relational lookup if the mapping does not use the lookup port. This reduces the amount of memory the Integration Service needs to run the session.

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